CN204592020U - A kind of modified model photoelectricity absolute value encoder bearing assembling structure - Google Patents
A kind of modified model photoelectricity absolute value encoder bearing assembling structure Download PDFInfo
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- CN204592020U CN204592020U CN201520064307.8U CN201520064307U CN204592020U CN 204592020 U CN204592020 U CN 204592020U CN 201520064307 U CN201520064307 U CN 201520064307U CN 204592020 U CN204592020 U CN 204592020U
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Abstract
The utility model discloses a kind of modified model photoelectricity absolute value encoder bearing assembling structure, the flange comprising main shaft, be assemblied in the bearing on main shaft and be assemblied in outside described bearing; Described main shaft is provided with the shaft shoulder, and described flange is provided with convex shoulder, and described bearing is installed in the installation position of the shaft shoulder and convex shoulder formation, and the described shaft shoulder carries out spacing to bearing inner race, and described convex shoulder carries out spacing to bearing outer ring.The utility model casts out the locking form of shaft clip, simplifies installation step, perfectly eliminates axial float and the radial-play of main shaft; Bearing outer ring is optimized for transition fit with coordinating of flange endoporus simultaneously, fully takes into account the structure of bearing, add the working life of bearing; Three-in-one assembly structure integrity is strong, and integral rigidity is good, substantially increases the mechanical location precision of optical code wheel, thus make the measuring accuracy of encoder entirety and positioning precision more accurate.
Description
Technical field
The utility model relates to encoder field, specifically, is related specifically to a kind of modified model photoelectricity absolute value encoder bearing assembling structure.
Background technique
Absolute value formula rotary photoelectric encoder, because its each position is definitely unique, anti-interference, without the need to power-failure memory, be applied to the angle in various industrial system, length measuring and positioning control more and more widely, the code-disc of absolute optical encoder there is many roads groove, per pass groove is successively with 2 lines, 4 lines, 8 lines, 16 lines ... layout, like this, in each position of encoder, by reading the logical of per pass groove, secretly, obtain unique 2 scale codings (Gray code) of one group of n-1 power from the zero degree side of 2 to 2, this is just called n position absolute encoder, such encoder is determined by the mechanical location of code-disc, the uniqueness of each position that absolute type encoder is determined by mechanical location, it is without the need to memory, without the need to looking for reference point, and need not count always, when need location aware, when just go to the position of reading it, like this, the noiseproof feature of encoder, the reliability of data substantially increases.
Ensure that the Automatic manual transmission position of optical code wheel is the key point of absolute type rotary photoelectric encoder, be related to the reading accuracy of encoder, be related to its positioning error and measurement error, the factor affecting code-disc mechanical location mainly contains: axial float and radial-play, so for clamping flange type photoelectric encoder, because code-disc is fixed on main shaft, under the prerequisite of machining accuracy that can ensure main shaft, the assembling of bearing just seems particularly important, and this is also the Focal point and difficult point place of present optical rotary encoder structural design; How to ensure bearing and main shaft, the cooperating structure of flange can be eliminated overall axial float and radial-play, or be controlled within the margin of error allowed, and is a difficult problem for present all encoder designer facings.
At this moment, just need the structure designing a set of main shaft and flange for clamping flange type photoelectric encoder, can with bearing fit after the radial-play of axle and axial float are controlled within scope, better ensure the mechanical location of optical code wheel.
See Fig. 1, bearing inner race and the main shaft 3 of existing a kind of bearing assembling structure are interference fit, and main shaft 3 is not to bearing inner race limited location, flange 2 is same with bearing outer ring is interference fit, also not to the outer ring limited location of bearing 1, first such design is unfavorable for the assembling of bearing 1, the bad assurance in position of bearing 1, next is that the interference fit of bearing outer ring and flange is easy to cause damage to bearing, increase ball friction, cause temperature too high, the most important thing is that the superposition designing several degree of adaptability like this causes the accumulation of error, complete machine is made to there is larger axial float and radial-play, cause the reduction of code-disc reading accuracy.
See Fig. 2, existing another kind of bearing assembling structure is at spindle mounted shaft clip, with rigid bearing 1 inner ring, improve the axial float of the related main shaft 3 of bearing to a certain extent, but shaft clip is easy to elastic strain occurs, and has the existence of stress when assembling, and adds risk when fixing inner ring, this kind of scheme can not eliminate the radial-play of axle equally, and adds the difficulty of assembling; There is the problem of outer ring and flange 2 endoporus interference fit in this scheme, has the risk that bearing life reduces equally.
The defect of both structures above-mentioned is:
1) from structural, this two schemes bearing outer ring all adopts interference fit with coordinating of flange, consider machining error and mismatch error, the cooperation of bearing outer ring and flange can make bearing outer ring have certain deformation quantity to a certain extent, has influence on the structure of bearing, increases pivoting friction, and ball is impacted, cause bearing to produce radial shifting amount, thus have influence on code-disc reading accuracy, affect location and the measurement error of encoder.
2) from technical, the first scheme has just carried out interference fit to bearing, there is not a location to Internal and external cycle, therefore well can not eliminate the axial float of bearing, thus drive the change in location of main shaft and optical code wheel, cause the inaccurate of reading accuracy, although first scheme has a positioning action to bearing inner race to a certain extent, but shaft clip is easy to produce elastic strain when assembling main shaft, produce stress, superpose the error of location, therefore the error of axial float can not be avoided excessive.
3) from manufacturability, the first assembly structure cannot be located bearing, very easily produces positional deviation, affect the assembling of complete machine, require high to running in bearings frock in compacting bearing process, and bad operation; Although the second assembly structure has certain fixation to bearing inner race, also there is the deviation of position during bearing assemble, and shaft clip not easily clamping on axle, be unfavorable for assembling.
To sum up, existing encoder bearing fit structural design all well can not control the device for elimination of axial-and radial-play of main shaft, thus can not fix the mechanical location of code-disc, affects optical module to the reading of code-disc and the positioning precision of complete machine and measurement error.
Model utility content
The purpose of this utility model is for deficiency of the prior art, provides a kind of modified model photoelectricity absolute value encoder bearing assembling structure, to solve the problem.
The technical problem that the utility model solves can realize by the following technical solutions:
A kind of modified model photoelectricity absolute value encoder bearing assembling structure, the flange comprising main shaft, be assemblied in the bearing on main shaft and be assemblied in outside described bearing; Described main shaft is provided with the shaft shoulder, and described flange is provided with convex shoulder, and described bearing is installed in the installation position of the shaft shoulder and convex shoulder formation, and the described shaft shoulder carries out spacing to bearing inner race, and described convex shoulder carries out spacing to bearing outer ring.
Preferably, described bearing outer ring and main shaft adopt interference fit.
Preferably, described bearing outer ring and flange adopt transition fit, interstitital texture glue-line between bearing outer ring and flange fitting surface.
Compared with prior art, the beneficial effects of the utility model are as follows:
1) on structural, the utility model has abandoned the interference fit of flange and bearing outer ring, avoid causing rigid injury to bearing, the structure of main shaft and flange is limited in bearing on fixed position, eliminate the axial float because assembly error produces, ensure that from structure the stability that three coordinates.
2) on technical, the utility model considers the fixing of bearing enclose, and give up the form of traditional shaft clip, adopt the fit form meeting bearing clearance, give full play to the effect of bearing in whole encoder, having had sufficient guarantee to the mechanical location of optical component and reading accuracy, is the innovation point to clamping flange type photoelectricity absolute value encoder bearing assemble.
3) in manufacturability, the utility model adopts Trinitarian structural design, bearing is fully located, and once assemble, the transition fit face interstitital texture glue of bearing flange, improve the rigidity of complete machine, perfectly eliminate complete machine axial float and radial-play, be once breakthrough design the optical rotary encoder having superelevation to require concerning mechanical location.
Accompanying drawing explanation
Fig. 1 is one of structural representation of existing bearing assemble described in the utility model.
Fig. 2 is the structural representation two of existing bearing assemble described in the utility model.
Fig. 3 is modified model photoelectricity absolute value encoder bearing assembling structure schematic diagram described in the utility model.
Fig. 4 a is the limit structure schematic diagram of main shaft described in the utility model.
Fig. 4 b is the spacing principle schematic of main shaft described in the utility model.
Fig. 5 a is the limit structure schematic diagram of flange described in the utility model.
Fig. 5 b is the spacing principle schematic of flange described in the utility model.
Fig. 6 is the three-in-one assembly structure schematic diagram described in model utility.
Number in the figure illustrates: bearing 1, flange 2, main shaft 3, the shaft shoulder 4.
Embodiment
The technological means realized for making the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the utility model further.
See Fig. 3, the utility model is by main shaft 3 increasing by one for carrying out the spacing shaft shoulder 4 to bearing inner race, and on flange 2, increase by one for carrying out spacing convex shoulder to bearing 1 outer ring, bearing enclose can be positioned by said structure completely, cast out the locking form of shaft clip, simplify installation step, perfectly eliminate axial float and the radial-play of main shaft; Bearing outer ring is optimized for transition fit with coordinating of flange endoporus simultaneously, fully takes into account the structure of bearing, add the working life of bearing; Three-in-one assembly structure integrity is strong, and integral rigidity is good, substantially increases the mechanical location precision of optical code wheel, thus make the measuring accuracy of encoder entirety and positioning precision more accurate.
See Fig. 4 a and Fig. 4 b, the design of main shaft 3 takes into full account the restriction to bearing inner race, its integrated design only need carry out foolproof installation to bearing, without the need to considering the positional factor of bearing 1, simplify installation step, and the design increases antiwhip, greatly reduce the risk of axial float, for Trinitarian assembling provides technical guarantee.
See Fig. 5 a and Fig. 5 b, the design of flange 2 fundamentally compensate for bearing outer ring without fixing defect, and bearing 1 is coordinated with flange 2 be optimized, consider bearing 1 play 0.003-0.018m (GB/T4604-1993), according to bearing 1 and flange 2 inner hole tolerance range (GB/T 275-1993), select the transition fit of J7, add structure glue at both fitting surfaces and coordinate rigidity to strengthen it, thus promote overall rigid, the basic existence eliminating radial-play.
See Fig. 6, the shaft shoulder of main shaft 1 can carry out spacing and fixing to inner ring, during assembling, direct pressing puts in place, need not consider the position of bearing; Flange 2 directly carries out spacing and fixing to bearing outer ring, and be filled between the two by structure glue, substantially increase the rigid of ligand entirety, axial float can well be eliminated to the locking of bearing in such two ends, Trinitarian cooperation then can avoid radial play very well, the perfect difficult problem solving the design of current encoder bearing assembling structure.
More than show and describe basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. a modified model photoelectricity absolute value encoder bearing assembling structure, the flange comprising main shaft, be assemblied in the bearing on main shaft and be assemblied in outside described bearing; It is characterized in that: described main shaft is provided with the shaft shoulder, described flange is provided with convex shoulder, and described bearing is installed in the installation position of the shaft shoulder and convex shoulder formation, and the described shaft shoulder carries out spacing to bearing inner race, and described convex shoulder carries out spacing to bearing outer ring.
2. modified model photoelectricity absolute value encoder bearing assembling structure according to claim 1, is characterized in that: described bearing outer ring and main shaft adopt interference fit.
3. modified model photoelectricity absolute value encoder bearing assembling structure according to claim 1, is characterized in that: described bearing outer ring and flange adopt transition fit, interstitital texture glue-line between bearing outer ring and flange fitting surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520064307.8U CN204592020U (en) | 2015-01-29 | 2015-01-29 | A kind of modified model photoelectricity absolute value encoder bearing assembling structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520064307.8U CN204592020U (en) | 2015-01-29 | 2015-01-29 | A kind of modified model photoelectricity absolute value encoder bearing assembling structure |
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| CN204592020U true CN204592020U (en) | 2015-08-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540180A (en) * | 2018-12-25 | 2019-03-29 | 倍赫曼工业技术(天津)有限公司 | Single-bearing photoelectric encoder |
| CN109827598A (en) * | 2019-03-29 | 2019-05-31 | 上海康比利仪表有限公司 | A kind of assembling structure of rotary encoder |
| CN110260895A (en) * | 2019-06-19 | 2019-09-20 | 倍赫曼工业技术(天津)有限公司 | A kind of photoelectric encoder |
| CN111289018A (en) * | 2020-03-06 | 2020-06-16 | 长春荣德光学有限公司 | Encoder of integrated bearing |
| CN111664189A (en) * | 2019-03-07 | 2020-09-15 | 舍弗勒技术股份两合公司 | Rolling Bearing Assembly |
-
2015
- 2015-01-29 CN CN201520064307.8U patent/CN204592020U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540180A (en) * | 2018-12-25 | 2019-03-29 | 倍赫曼工业技术(天津)有限公司 | Single-bearing photoelectric encoder |
| CN109540180B (en) * | 2018-12-25 | 2024-10-29 | 东菱技术有限公司 | Single-bearing photoelectric encoder |
| CN111664189A (en) * | 2019-03-07 | 2020-09-15 | 舍弗勒技术股份两合公司 | Rolling Bearing Assembly |
| CN109827598A (en) * | 2019-03-29 | 2019-05-31 | 上海康比利仪表有限公司 | A kind of assembling structure of rotary encoder |
| CN110260895A (en) * | 2019-06-19 | 2019-09-20 | 倍赫曼工业技术(天津)有限公司 | A kind of photoelectric encoder |
| CN111289018A (en) * | 2020-03-06 | 2020-06-16 | 长春荣德光学有限公司 | Encoder of integrated bearing |
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Granted publication date: 20150826 Termination date: 20200129 |