CN1049413A - Finely and widely adjusting means of microscope - Google Patents
Finely and widely adjusting means of microscope Download PDFInfo
- Publication number
- CN1049413A CN1049413A CN 89102436 CN89102436A CN1049413A CN 1049413 A CN1049413 A CN 1049413A CN 89102436 CN89102436 CN 89102436 CN 89102436 A CN89102436 A CN 89102436A CN 1049413 A CN1049413 A CN 1049413A
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- gear
- rotating shaft
- wheel
- microscope
- pivoted arm
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Abstract
The present invention is a kind of focusing of microscope mechanism with the thick fine adjustment of coaxial-type and overload slipping protection function; it is characterized in that: the coaxial adjusting of rough micro-moving mechanism; adopted the elementary errors gear drive; form by two pairs of meshing gears and a planet pivoted arm; two pairs of meshing gears are selected different modulus values respectively for use, make two centre wheel Z
1, Z
3Between reference diameter form a micro-difference, to obtain bigger reduction gear ratio; This mechanism also is added with overload protection function.This mechanism has compact conformation, good manufacturability, and reduction gear ratio is big, advantages such as sensitivity height.This mechanism is applicable to multiple microscopes such as biology, metallographic, polarisation.
Description
The invention belongs to the optical microscope field, specifically a kind of focusing of microscope mechanism with the thick fine adjustment of coaxial-type and overload slipping protection function.
At present, external middle-and-high-ranking microscope has generally adopted coaxial finely and widely adjusting means, and the kind of drive that this mechanism adopts usually has: worm and gear, planet circular system, gear set etc.Though adopt the mechanism of these kinds of drive that preferable performance is all arranged, ubiquity complex structure, technological requirement height, the more high weak point of cost.Domestic a kind of coaxial-type rough micro-moving mechanism governor motion, employing be the early production gear set structure of Japanese Olympus, coarse motion partly comprises coarse motion handwheel, rotating shaft, gear and tooth bar; Fine motion partly comprise fine motion manually, connecting rod, four pairs of meshing gears, three rotating shafts, gear and tooth bars.Owing to be the gear set transmission, can not obtain bigger speed ratio, gearing mesh often, poor sensitivity, return difference are also big.Volume is big simultaneously, complex structure, and processing time consuming is taken material.
Purpose of the present invention then is the problem at above-mentioned existence, has proposed a kind ofly have that volume is little, compact conformation, good manufacturability, reduction gear ratio are big, highly sensitive, the coaxial-type rough micro-moving mechanism focus adjusting mechanism of economical and efficient, and is added with overload slipping protection performance.
Technical solution of the present invention:
Gear (4), trim ring (6), steel ball, lining ring (7) and butterfly spring (8) are housed on rotating shaft (5) cylindrical successively; Thrust bearing (9), coarse motion friction pulley (10), dead center wheel (3), steel ball, driven centre wheel (1), anti-moving-coil (11) and hexagonal nut (12) are housed successively on rotating shaft (5) right side; Be equipped with on the rotating shaft right side: sliding bearing (13) and coarse motion handwheel (14).The horizontal string of link rod (15) is in rotating shaft (5) center pit, and left end is fixing with screw and fine motion handwheel (16), and right-hand member is fixing with screw and pivoted arm wheel (17), heavily joins planet wheel (2), is installed on the pivoted arm wheel (17) with screw and clamping plate (18).Entire mechanism is being supported by sliding bearing (13) and thrust bearing (9), and is fastened on the microscope mirror holder with screw.
In order to obtain bigger reduction gear ratio, the kind of drive has adopted the elementary errors gear drive.The elementary errors gear drive is to select different modulus values respectively for use by two pairs of meshing gears, makes the planetary gear transmission of a micro-difference △ D of reference diameter formation of two centre wheels.Promptly two pairs of planet wheel reference diameters equate D
2=D
' 2Two central gear reference diameters have a difference, △ D=D
1-D
3, when pivoted arm H turns round, heavily join gear Z
2, Z
' 2Be synchronized with the movement its angular velocity Wz=Wz ', Z around two centre tooth crop rotation planets
2With driven centre wheel Z
1Engagement, because there is a micro-difference △ D in two centre wheel reference diameters, and dead center wheel Z
3Be fixing non-rotating, so driven centre wheel Z
1Relative fixed centre wheel Z
3One micro-angular velocity W must be arranged
1Gyration.This micro-angular velocity W
1Can satisfy of the requirement of this mechanism than the big retarding ratio.Like this, only two pairs of meshing gears of need can be realized the purpose than the big retarding ratio.In order to adapt to this method, when selecting different modulus value for use, speed ratio commonly used and required gear teeth ordered series of numbers are in Fig. 1, Fig. 2, Fig. 3 with this mechanism.
Objective tube breaks observed section during for fear of focusing of microscope, and the present invention is added with overload slipping protection function.General assembly (TW) with the slide plate lift component acts on upward generation driving force M of gear (4), owing under the reacting force of butterfly spring (8), exist certain friction force between gear (4) and the rotating shaft (5), so gear (4) can not slide with rotating shaft (5) surface in contact, if continue to increase driving force M+M ', when increasing to the formed friction force in maximal friction countershaft (5) center that can overcome between gear (4) and rotating shaft (5) surface apart from Mf, gear (4) slides with rotating shaft (5) surface beginning constant speed.Then the slipping protection effect plays in mechanism.At this moment, the driving force M ' that the back increases, the maximum pressure that bears of observed section exactly.Regulate the axial location of driven centre wheel (1) on rotating shaft (5) right-hand member screw thread, just the size of the reacting force Q of scalable butterfly spring (8) and friction force are apart from the size of Mf.During the dress school, can on microscope stage, place the weight that a weight equates with M ', regulate the axial location of driven centre wheel (1).Can the constant speed downslide be as the criterion until worktable.After mixing up, load onto anti-moving-coil (11), tighten hexagonal nut (12), the slipping protection function is promptly adjusted and is finished.Under the effect of butterfly spring (8), also produce sliding friction moment Mf ' and rolling friction moment Mf respectively between coarse motion friction pulley (10) and the thrust bearing (9) and between dead center wheel (3) and the driven centre wheel (1) ".Can get Mf '＞Mf+Mf according to friction force apart from calculating fraction ".
Microscopical coarse motion is regulated by rotating coarse motion handwheel (14) or coarse motion friction pulley (10) and is realized.Coarse motion handwheel (14) is to be fastened in the rotating shaft (5) with the fastening screw, the revolution of formation one, and being speedup form by planet circular system, coarse motion friction pulley (10) connects with rotating shaft (5), because planet circular system generally all has self-locking performance when speedup, so it is the same with coarse motion handwheel (14) to rotate coarse motion friction pulley (10), all directly by rotating shaft (5), gear (4), tooth bar members such as (20) is realized the coarse motion regulatory function of worktable.
Fine motion handwheel (16) and pivoted arm wheel (17) are screwed on link rod (15) and become one.According to elementary errors gear drive principle, rotate pivoted arm wheel (17) or fine motion handwheel (16), two centre wheels begin to relatively rotate, because coarse motion friction pulley (10) and dead center wheel (3) adopt interference fit, then two members become one.Under the effect of Mf ', keep stationary state in friction force with thrust bearing (9).And the micro-angular velocity of driven centre wheel (1) is by rotating shaft (5), gear (4), and tooth bars (20) etc. are realized the fine motion regulatory function of worktable.
Domestic and international existing microscope coaxial-type is thick relatively at present in the present invention, and the fine motion focus adjusting mechanism has following advantage: because this mechanism only can reach the purpose of big retarding ratio with two pairs of meshing gears, thereby driving error is few, and speed ratio is reliable, and is highly sensitive; This mechanism is thick, fine motion is focused and overload slipping protection function can both work in the omnidistance any position of guide rail, thereby applied widely, easy to operate; Coarse motion handwheel position, this mechanism left side still has enough positions, also can set up the spacing device that waits of pre-focusing; This mechanism element simple shape, quantity is few; Everyways such as material, processing technology, machine tool there is not specific (special) requirements.Thereby good manufacturability, the dress appearance of a school is easy, and it is convenient to implement, economical and efficient; This mechanism is not only applicable to multiple microscopes such as biology, full phase, polarisation, can be used in other exact instrument and the precision optical machinery yet.
Fig. 1 be the present invention not equal modulus value m be 0.3 and 0.4, ratio of gear iH
1With the number of teeth z table of comparisons.
Annotate: 1 heavily joins planet wheel Z
2And Z
' 2The number of teeth get 3 and 4 common multiple, its reference diameter equates.
In 2 two pairs of meshing gears, the gear die numerical value that the number of teeth is many is 0.3, and the module that the number of teeth is few is 0.4.
Fig. 2 be the present invention not equal modulus value m be 0.4 and 0.5, ratio of gear iH
1With the tooth number Z table of comparisons.
Annotate: 1 heavily joins planet wheel Z
2And Z
' 2The number of teeth get 4 and 5 common multiple, its reference diameter equates.
In 2 two pairs of meshing gears, the gear die numerical value that the number of teeth is many is 0.4, and the module that the number of teeth is few is 0.5.
Fig. 3 be the present invention not equal modulus value m be 0.5 and 0.6, ratio of gear iH
1With the tooth number Z table of comparisons.
Annotate: 1 heavily joins planet wheel Z
2And Z
' 2The number of teeth get 5 and 6 common multiple, its reference diameter equates.
In 2 two pairs of meshing gears, the gear die numerical value that the number of teeth is many is 0.5, and the gear die numerical value that the number of teeth is few is 0.6.
Fig. 4 is a structural representation of the present invention.
Fig. 5 is transmission principle figure of the present invention.
Embodiment:
Require 1. coarse motion range of adjustment 20mm.2. fine motion range of adjustment 20mm, the fine motion handwheel returns and circles, and the worktable lifting value is 0.2mm, scale value 0.002mm.3. worktable lifting need have overload slipping protection function.
Microscope coaxial-type shown in Figure 4 is thick, the fine motion focus adjusting mechanism then designs according to above-mentioned requirements.Coarse motion handwheel external diameter is 45mm, and fine motion handwheel external diameter is 23mm.The determining of inner parameter pressed row step preface: 1. select gear (4) modulus m4=0.5 tooth number Z 4=26, reference diameter D
4=13mm.When 2. regulating, because driven centre wheel (1) is to belong to revolution synchronously with gear (4), returns and circle, the lifting value of worktable equals the circumference D of gear (4) reference circle
4π ≈ 40.84mm.
Pivoted arm wheel (17) and fine motion handwheel (16) are combined into one revolution, return according to designing requirement and to circle, the worktable lifting value is 0.2mm, and the relative ratio of pivoted arm wheel (17) and driven centre wheel (1) equals to return separately the ratio of the corresponding lifting value of the aftertable that circles, i.e. iH
1=(D4 π)/0.2 ≈ 204.2
3. the different modulus values of two meshing gears get 0.4,0.5 respectively in the elementary errors gear drive, and with reference to Fig. 2, pivoted arm wheel (17) and driven centre wheel (1) relative ratio iH1 select 205 nearby for use.In Fig. 5, select Z1=41, Z respectively for use
1=16, Z
' 1=20, Z
3=51; D
1=20.5, D
2=8, D
' 2=8, D
3=20.4; m
1=0.5, m
2=0.5, m
' 2=0.4, m
3=0.4.D wherein
1, D
2, D
' 2, D
3And m
1, m
2, m
' 2, m
3Be respectively gear Z
1, Z
2, Z
' 2, Z
3Corresponding reference diameter and modulus.
4. checking computations: in train shown in Figure 4, because Z
3Being fast pulley, (is n
3=0) so to take turns is the cyclic train of delegation's star-wheel for this.Thereby:
I1H=1-
=1-(± (Z
2Zn)/(Z
1In-1)) try to achieve and be i1H=1-i
H 13, and
(I
2I
3)/(Z
1Z
2)=(16 * 51)/and (41 * 20)=204/205, so i1H=1-204/205=1/205 or iH1=205 promptly circle Z when pivoted arm H returns
1Just changeing 1/205 changes, and its worktable lifting value is 40.84/205, approximates 0.1992mm(and design theory and requires to differ 0.0008mm) pivoted arm is carved with 100 mean lines on taking turns, and scale value approximates 0.002mm.(requiring to differ 0.000008mm) with theory
Claims (3)
1, the coarse motion part is by the coarse motion handwheel, rotating shaft, gear and tooth bar, the fine motion part is by the fine motion handwheel, connecting rod, meshing gear, rotating shaft, the finely and widely adjusting means of microscope that gear and tooth bar are formed, it is characterized in that in the middle of rotating shaft (5), on the cylindrical gear (4) being housed successively, trim ring (6), steel ball, lining ring (7) and butterfly spring (8), thrust bearing (9) is housed successively on the rotating shaft right side, coarse motion friction pulley (10), dead center wheel (3), steel ball, driven centre wheel (1), anti-moving-coil (11) and hexagonal nut (12) are equipped with sliding bearing (13) and coarse motion handwheel (14) in the rotating shaft left side; The horizontal string of link rod (15) is in shaft central hole, and left end is fixing with screw and fine motion handwheel (16), and right-hand member is fixing with screw and pivoted arm wheel (17); Heavily joining planetary gear (2) is installed on the pivoted arm wheel (17) with screw and clamping plate (18); Entire mechanism is supported by sliding bearing (13) and thrust bearing (9), and is fastened on the microscope mirror holder with screw.
2, finely and widely adjusting means of microscope according to claim 1 is characterized in that fine motion is regulated to be made up of two pairs of meshing gears and a planet pivoted arm, and two pairs of meshing gears are selected different modulus values respectively for use, two centre wheel Z
1Z
3Between reference diameter a micro-difference, △ D=D are arranged
1-D
3
3, finely and widely adjusting means of microscope according to claim 1 is characterized in that rough micro-moving mechanism is regulated and the overload slipping protection is all used an auxiliary spindle, gear, tooth bar and guide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102436 CN1019920C (en) | 1989-08-11 | 1989-08-11 | Finely and widely adjusting means of microscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102436 CN1019920C (en) | 1989-08-11 | 1989-08-11 | Finely and widely adjusting means of microscope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1049413A true CN1049413A (en) | 1991-02-20 |
| CN1019920C CN1019920C (en) | 1993-02-17 |
Family
ID=4854710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89102436 Expired - Fee Related CN1019920C (en) | 1989-08-11 | 1989-08-11 | Finely and widely adjusting means of microscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019920C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062186A (en) * | 2009-11-16 | 2011-05-18 | 林郁忍 | Coarse adjustment and fine adjustment linear moving mechanism |
| CN102539803A (en) * | 2011-12-30 | 2012-07-04 | 杭州浙大优创科技有限公司 | Detection platform for milk somatic cells |
| CN103135221A (en) * | 2012-12-31 | 2013-06-05 | 麦克奥迪实业集团有限公司 | Eccentric sleeve and heavy load rough-fine adjustment coaxial microscope |
| CN105717622A (en) * | 2016-04-18 | 2016-06-29 | 苏州市汉诺威升降台有限公司 | Lifting mechanism used for microscope condenser |
| CN105911669A (en) * | 2016-05-17 | 2016-08-31 | 宁波舜宇电子有限公司 | Focusing structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253484B (en) * | 2011-06-07 | 2012-05-23 | 宁波湛京光学仪器有限公司 | Coaxial coarse/fine focusing structure for microscope platform adjustment |
-
1989
- 1989-08-11 CN CN 89102436 patent/CN1019920C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062186A (en) * | 2009-11-16 | 2011-05-18 | 林郁忍 | Coarse adjustment and fine adjustment linear moving mechanism |
| CN102539803A (en) * | 2011-12-30 | 2012-07-04 | 杭州浙大优创科技有限公司 | Detection platform for milk somatic cells |
| CN103135221A (en) * | 2012-12-31 | 2013-06-05 | 麦克奥迪实业集团有限公司 | Eccentric sleeve and heavy load rough-fine adjustment coaxial microscope |
| CN103135221B (en) * | 2012-12-31 | 2015-12-02 | 麦克奥迪实业集团有限公司 | A kind of eccentric adjusting sleeve and heavy load slightly finely tune coaxial microscope |
| CN105717622A (en) * | 2016-04-18 | 2016-06-29 | 苏州市汉诺威升降台有限公司 | Lifting mechanism used for microscope condenser |
| CN105911669A (en) * | 2016-05-17 | 2016-08-31 | 宁波舜宇电子有限公司 | Focusing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1019920C (en) | 1993-02-17 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |