CN104565333A - Method for automatically eliminating limited angle gear backlash - Google Patents

Method for automatically eliminating limited angle gear backlash Download PDF

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Publication number
CN104565333A
CN104565333A CN201410853028.XA CN201410853028A CN104565333A CN 104565333 A CN104565333 A CN 104565333A CN 201410853028 A CN201410853028 A CN 201410853028A CN 104565333 A CN104565333 A CN 104565333A
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CN
China
Prior art keywords
gear
pinion
tooth
gap
loading
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CN201410853028.XA
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Chinese (zh)
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CN104565333B (en
Inventor
周通
龙波
吴辉
周马盛
钟小兵
郑昌盛
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西南技术物理研究所
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Priority to CN201410853028.XA priority Critical patent/CN104565333B/en
Publication of CN104565333A publication Critical patent/CN104565333A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/12Arrangements for adjusting or for taking-up backlash not provided for elsewhere
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/12Arrangements for adjusting or for taking-up backlash not provided for elsewhere
    • F16H2057/121Arrangements for adjusting or for taking-up backlash not provided for elsewhere using parallel torque paths and means to twist the two path against each other

Abstract

The invention discloses a method for automatically eliminating limited angle gear backlash, and aims to provide a compact limited angle gear backlash eliminating mechanism which is simple and compact in structure and capable of realizing gear transmission without backlash, improving gear transmission precision, reducing cost and improving assembling capacity. The technical scheme for implementing the method includes that one of a driving gear and a driven gear which are engaged with each other is divided into a main sector gear and an auxiliary sector gear, a fixed main gear working portion and the loaded auxiliary gear are sectored, a bottom arc of a small end sector of the loaded auxiliary gear fits with a cylindrical surface of a gear rotating shaft cylinder, inclined hole grooves (7) are formed in sectors of the fixed main gear and the loaded auxiliary gear, and gear tension springs (4) keeping a tension state are mounted in the inclined hole grooves, the fixed main gear and the loaded auxiliary gear are connected together by loading the sector of the auxiliary gear through the gear tension springs, and the fixed main gear and the loaded auxiliary gear are mutually staggered to form a certain circumference angle and engaged with the driven gear in opposite directions.

Description

The method of automatic elimination limit corner gear tooth side gap
Technical field
The present invention relates to a kind of method of automatic elimination limit corner gear tooth side gap, be applicable to the Gapless gear transmission carrying out finite angle in limited bulk space.
Background technique
Gear transmission is a kind of primary drive mode being widely used in various mechanical system and equipment.Gear drive is control and measurement mechanism common in electronic product, and gear-driven precision directly has influence on the control and measurement performance of product.Gear drive is when single-direction transmission, and transmission accuracy is higher.But in some servo electric systems, the return difference that the backlash of ordinary gear causes can make servo-system response lag.Gear itself has the geometry entity of complicated shape and the transmission component of rotation motion as one, and it produces skew with the tangent to periphery direction that datum hole center is the center of circle relative to desirable position and transmits rotation.Gear pair circumferential backlash is by feed error during design, the composition such as the foozle of single gear itself and drive centre distancc error.The accuracy of manufacturing of gear itself, to service behaviour, the bearing capacity of whole machine and all have a great impact working life.There is various driving error in the servo-system of gear transmission chain, these errors roughly can divide angled transmission error and Linear transmission error.The driving error of the above-mentioned type all with gear transmission process in take turns running clearance have much relations.In servo-system working procedure, inevitably by the above-mentioned propagation of error produced by wheel running clearance.According to its service condition, gear transmission should meet the requirement of the following aspects.(1) transmit movement accuracy and require that gear transmits motion more exactly, velocity ratio is constant.Namely require that the angular errors of gear in one turn is no more than certain limit.(2) robust motion is transmitted.Require gear transmission stable movement, to reduce shock and vibration and noise.The change of instantaneous speed ratio when namely requiring that limiting gear rotates.(3) load diatibution uniformity.When requiring working gear, face is wanted evenly, and to make gear, reason load diatibution is irregular and make contact stress excessive when transferring power, causes flank of tooth premature abrasion.Contact precision, except comprising face uniformity, also comprises area of contact and contact position.(4) rationality of transmission sideshake.When requiring working gear, between non-working flank, leave certain gap, with lubrication oil, compensate some errors when Yin Wendu, dimensional changes caused by resiliently deformable and processing, assembling.The accuracy of manufacturing of gear and backlash are mainly determined according to the purposes of gear and operating conditions.For the gear of indexing drive, the kinematic accuracy of major requirement gear is higher; For high speed motive force transmission gear, in order to reduce impact and noise, stable working precision is had higher requirements; For the gear of heavy-duty low-speed transmission, then require that the flank of tooth has higher contact precision, to ensure the unlikely premature abrasion of gear; For the gear of commutate transmission and reading mechanism, then strictly should control backlash, if desired, must gap be eliminated.By the restriction of machining accuracy, there is deviation in flank of tooth pattern, and gear transmission is difficult to the back lash avoided because tooth profile error and alignment error etc. cause.When needs drived control object (or measurand) reciprocating rotation, due to the existence of back lash, gear transmission chain is made to produce backlash, and bring larger departure or measurement error, control accuracy is produced and has a strong impact on, therefore, needing the occasion transmitting High-precision angle information or position information, suitable error control method must be adopted, to improve transmission accuracy, reach better operational effect.Common hysterisis error controlling method has: double-motor anti-backlash method, double bevel gear backlash method, and Gear center apart from adjusting method, to be turned round/spring loads split gear and to disappear gap method, and friction disappears gap method etc.The removing method of gear backlash is a lot.In order to address this problem, people design a lot of ways.But from the method for known elimination backlash, always there is such or such deficiency in them, as complex structure, size is large, bearing capacity is poor, can not auto-compensation etc.Recent decades, about the research of gear clearance elimination is comparatively deep, research method is summed up, and the main method of elimination conventional in engineering or reduction backlash has:
1. adjust centre distance method: control backlash by the centre distance changing driving gear and driven gear rotating shaft.The shortcoming of this method the skimming wear of gear can be made to increase after adjustment centre distance, even there will be the phenomenon of killing when adjusting excessive.
2. contact hairspring method: lay hairspring by last ring in Transmitted chains, produce reaction torque, make all parts in Transmitted chains all keep one-way compression, gear makes the flank of tooth be in one flank gearing state all the time in forward or reverse process, thus eliminates backlash to the impact of backlash.The major defect of this method still has in Transmitted chains that backlash exists, carry-over moment is little, is mainly applicable in miniature instrument.
3. eccentric bushing (axle) adjusting method a: gear in intermeshing a pair gear is contained on motor output shaft, and motor is arranged on eccentric shaft, by the corner of rotating eccentric sleeve (axle), regulate the centre distance of two engaging gears, eliminate backlash during cylindrical gears forward and backward.Feature is that structure is simple, but its sideshake can not auto-compensation.
4. biplate thin gear side set adjusting method: in intermeshing a pair gear, make wide gear for, another forms with the thin gear of two panels.In work, the left flank of a thin gear and the right flank of another thin gear is made to be close to the arranged on left and right sides of wide gear teeth groove respectively, to eliminate backlash, dead band is there will not be time reverse, concrete regulating measures is: circumferential spring has respectively opened several circumferential arc grooves on two web gears, and on the end face of two gears the short column of mounting spring.Make two web gear dislocation under the action of the spring and eliminate backlash.The pulling force of the spring in this structural type must be enough to overcome driving torque and just can work.Because the method is subject to circumferential arc groove and spring sizes restriction, therefore be only applicable to Machine Tools Electric actual training device, reading device and be not suitable for drive unit.Adjustable extension spring is equipped with lug on two web gears, and one end of spring is hooked on lug, and the other end is hooked on screw.The extrusion of the pulling force size using nuts adjusting screw of spring, uses nut check after adjusting again.This thin slice side set regulating mechanism, is characterized in relatively simple for structure, but adjustment is more time-consuming, and backlash can not auto-compensation, and axial dimension is comparatively large, and structure owes compact.
Require high application at transmission accuracy, mostly adopt above split gear side set to eliminate the method in gap.In the typical apply of such mechanism, fixing master gear and rotating shaft connect firmly, and the processing of fixing master gear side, slightly larger than the cylinder of the diameter of axle, loads pinion and processes onesize circular hole by its coaxial sleeve on this cylinder, and keep fitting with fixing master gear.Meanwhile, for ensure arbitrarily angled within the scope of 360 ° on can eliminate backlash preferably, generally all leading, loading on pinion face and 2 ~ 4 groups of springs are along the circumferential direction installed, with provide eliminate backlash force pulling force, number of springs is more, complex structure, and size is large.
And in more industrial control and measurement application, control object or measurand often only need in less limited range reciprocating rotation, most of flank of tooth is had to be positioned at outside slewing area in master then fixed thereon, loading pinion, from having neither part nor lot in engagement, waste processing and cost of material, and in the product of part body limited space, these teeth are not only completely useless, also can take larger space, and easy and peripheral member formation interference, be unfavorable for that space utilization and assembling realize, limit the application of mechanism.Along with the lifting of clearance elimination gear operating mode complexity, prior art clearance elimination gear can not meet the needs of the dynamics of mechanic electric system characteristic research containing backlash gear mechanism.
Summary of the invention
The object of the invention is the deficiency existed for prior art, there is provided a kind of mode simple, compact structure, can realize gear transmission without back lash, improve gear-driven precision, and can reduce costs, improve the method for the automatic elimination limit corner gear tooth side gap of assembling.
The technical solution used in the present invention: in intermeshing driving gear, driven gear is made the tooth sector that through-thickness is divided into major and minor two panels,: driving gear or driven gear are made up of with the loading pinion 2 being parallel to fixing master gear 6 the fixing master gear 6 connected firmly on rotary gear shaft cylinder 1, fixing master gear 6 working portion and loading pinion 2 are set to fan-shaped, load circular arc laminating rotary gear shaft cylinder 1 cylndrical surface bottom pinion 2 small end covering of the fan; Described fixing master gear with the sector of loading pinion 2 make inclined hole groove 7, the gear extension spring 4 keeping extended state is installed in inclined hole groove 7, fixing master gear 6 and loading pinion 2 link together along inclined hole groove 7 two ends by gear extension spring 4 respectively, fixing master gear 6 and load pinion 2 and mutually to stagger the angle of circumference of several angle, engages from direction in opposite directions with driven gear 5 simultaneously.
The present invention has following beneficial effect compared to prior art:
The present invention installs the gear extension spring keeping extended state in the sector inclined hole groove 7 of described fixing master gear with loading pinion, master gear and loading pinion is fixed along inclined hole oblique pull by gear extension spring, can provide load pinion relatively fix master gear along the circumferential direction force pulling force, ensure main, load pinion all can engage with driven gear 5 simultaneously, without reversing drive gap, the adhesive force loading side cylinder table top on arc surface and fixing master gear bottom pinion covering of the fan can be provided again, thus restriction loads pinion and fixing master gear can only to stagger coaxially several angle in circumference, ensure that the accuracy of mesh of positive and negative two sense of rotation.
Method is simple, compact structure, compact, is convenient to install.The present invention adopts the main driven tooth sectional wheel engagement of non-full circle, and can reduce volume, implementation structure is compact.Size and number of components can be effectively reduced, and can reduce costs.The loading pinion 2 connecting firmly fixing master gear on rotary gear shaft cylinder 6 and be parallel to fixing master gear 6 is adopted to stagger the angle of circumference composition driving gear of several angle, need not too improve Gear Processing precision and assembly precision, gear transmission can be realized without back lash, greatly improve gear-driven precision, and then improve the control accuracy of control object or the measuring accuracy to measurand.The main driven tooth of non-full circle can reduce processing cost and material, can make compact structure and weight reduction, is beneficial to the layout of small space.Be applicable to the control and measurement mechanism of narrow space.Gear extension spring oblique pull, finite angle gear eliminates gap and transmission accuracy to provide the power of both direction ensure that.Load pinion 2 can only with fixing master gear 6, to stagger coaxially several angle in circumference, and there will not be circular runout, no matter thus make loading pinion 2 and fixing master gear 6 rotate forward or in counter rotation, all can ensure the accuracy of mesh of driving gear and driven gear 5.
Accompanying drawing explanation
Fig. 1 is compact type finite angle gear clearance eliminating machine three-dimensional view of the present invention.
Fig. 2 is the STRUCTURE DECOMPOSITION figure of driving gear.
Fig. 3 is the pulling force decomposing schematic representation of gear extension spring and active, driven gear engagement position partial enlarged drawing.
In figure: 1 driving gear rotating shaft cylinder, 2 load pinion, 3 stop screws, 4 gear extension springs, 5 driven gears, 6 fixing master gears, 7 inclined hole grooves.
Embodiment
In order to make the object of embodiments of the invention, technological scheme and advantage clearly understand, below in conjunction with embodiment and accompanying drawing, embodiments of the invention are further described in detail.At this, schematic description and description of the present invention is only for explaining the present invention, but not as a limitation of the invention.
Consult Fig. 1, Fig. 2.Pair of rotary axes line is fixed, intermeshing gear, is respectively driving gear and driven gear 5.Wherein, driving gear is made up of biplate, and gear shape is identical, and effective working portion is fan-shaped.Main tooth and the secondary tooth of driving gear all can adopt straight tooth column tooth, and driven gear 5 is the same.Bottom secondary tooth, cylndrical surface is identical with side cylinder table terrace radius on main tooth, and coaxially assembles, and can rotate around this cylinder, stagger several angle, and stop screw limits its maximum rotation scope, and reality can ensure the tooth that staggers.First in intermeshing driving gear, driven gear is made the tooth sector that through-thickness is divided into major and minor two panels, driving gear (also can be driven gear) is made up of with the loading pinion 2 being parallel to fixing master gear 6 the fixing master gear 6 connected firmly on rotary gear shaft cylinder 1, fixing master gear 6 working portion and loading pinion 2 are set to fan-shaped, load circular arc laminating driving gear rotating shaft cylinder 1 cylndrical surface bottom pinion 2 small end covering of the fan; The fixing master gear 6 of driving gear and the sector of loading pinion 2 make inclined hole groove 7, the gear extension spring 4 keeping extended state is installed in inclined hole groove 7, fixing master gear 6 and loading pinion 2 link together along inclined hole groove 7 two ends by gear extension spring 4 respectively, fixing master gear 6 and load pinion 2 and mutually to stagger the angle of circumference of several angle, engages from direction in opposite directions with driven gear 5 simultaneously.Fixing master gear 6 and load pinion 2 and mutually to stagger several angle, this angular range should ensure at least can to stagger a profile of tooth width in circumference.Two stop screws 3 are symmetrical in and load pinion 2 covering of the fan both sides, fixing master gear 6 and loading pinion 2 being linked together, avoiding fixing master gear 6 and loading pinion 2 departing from by loading pinion 2 covering of the fan.Stop screw 3 is by loading the via hole on pinion 2 covering of the fan, appropriate gap is reserved with between two via holes, to ensure that loading pinion 2 can fix master gear 6 relatively in limited angular range, arc surface and the cylinder table top connected firmly on the rotary gear shaft cylinder 1 of fixing master gear bottom free revolute pair tooth 2 small end covering of the fan are coaxially fitted.
Consult Fig. 3.Be shaped with loading gear extension spring 3 in inclined hole groove 7 at the corresponding position of described fixing master gear sector and loading pinion, provide oblique pulling at work.Oblique pulling can be analyzed to the power of both direction, a circumferentially tangential horizontal component, a radial component along radial direction.Horizontal component provides fixing master gear 6 in rotation process, load and force pulling force between pinion 2, no matter make fixing master gear 6, loading pinion 2 rotate forward or in counter rotation, all make fixing master gear 6 and load pinion 2 to keep engaging with driven gear 5 simultaneously; Radial component forces arc surface and rotary gear shaft cylinder cylinder table top bottom loading pinion 2 small end covering of the fan to fit tightly in the course of the work, thus restriction load pinion 2 can only with fixing master gear 6, to stagger coaxially several angle in circumference, and there will not be circular runout, no matter thus make loading pinion 2 and fixing master gear 6 rotate forward or in counter rotation, all can ensure the accuracy of mesh of driving gear and driven gear 5.After two panels tooth sector relatively rotates certain number of teeth, gear extension spring compresses, then fan-shaped split gear is engaged with driven gear, the radius of curvature of contact points place two tooth sector equals two cylindrical end face circle radius in same point contact respectively, and the engagement of any time is counted along with the difference of structural parameter in cyclically-varying.Due to the effect of gear extension spring, the gear teeth of split gear contact with two flanks of driven gear respectively and engage, and reach the effect of the gap that disappears, improve transmission accuracy.

Claims (9)

1. automatically eliminate the method for limit corner gear tooth side gap for one kind, it is characterized in that comprising the steps: intermeshing driving gear, make through-thickness and be divided into master for one in driven gear, the tooth sector of secondary two panels, driving gear (or driven gear) is made up of the fixing master gear (6) connected firmly on rotary gear shaft cylinder (1) and the loading pinion (2) that is parallel to fixing master gear (6), fixing master gear (6) working portion and loading pinion (2) are set to fan-shaped, load circular arc laminating rotary gear shaft cylinder (1) cylndrical surface bottom pinion (2) small end covering of the fan, described fixing master gear with the sector of loading pinion (2) make inclined hole groove (7), the gear extension spring (4) keeping extended state is installed in inclined hole groove (7), gear extension spring (4) will be fixed master gear (6) along inclined hole groove (7) and load pinion (2) and link together, fixing master gear (6) and load pinion (2) and mutually to stagger the angle of circumference of several angle, while, engages from direction in opposite directions with driven gear (5).
2. the as claimed in claim 1 method automatically eliminating limit corner gear tooth side gap, is characterized in that: fixing master gear (6) and to load the mutual offset angular of pinion (2) be at least to stagger a profile of tooth width in circumference.
3. the method automatically eliminating limit corner gear tooth side gap as claimed in claim 1, it is characterized in that: gear extension spring (4) one end is by loading pinion (2) inclined hole groove (7), and one end connects firmly fixes master gear (6) in the upper oblique pull of fixing master gear (6) inclined hole groove (7).
4. the method automatically eliminating limit corner gear tooth side gap as claimed in claim 1, it is characterized in that: stop screw (3) is by loading the via hole on pinion (2) covering of the fan, appropriate gap is reserved with, to ensure that loading pinion (2) relatively can be fixed master gear (6) and stagger in limited angular range between two via holes.
5. the method automatically eliminating limit corner gear tooth side gap as claimed in claim 1, is characterized in that: gear extension spring (3) provides oblique pulling at work.
6. the as claimed in claim 4 method automatically eliminating limit corner gear tooth side gap, is characterized in that: oblique pulling is decomposed into the power of both direction, a circumferentially tangential horizontal component, a radial component along radial direction.
7. the method automatically eliminating limit corner gear tooth side gap as claimed in claim 5, it is characterized in that: horizontal component provides fixing master gear (6) in rotation process, load and force pulling force between pinion (2), make main fixing master gear (6), load pinion (2) no matter rotating forward or in counter rotation, all making fixing master gear (6) and load pinion (2) to keep engaging with driven gear (5) simultaneously.
8. the method automatically eliminating limit corner gear tooth side gap as claimed in claim 5, it is characterized in that: radial component forces in the course of the work and loads arc surface and rotary gear shaft cylinder cylinder table top bottom pinion (2) small end covering of the fan and fit tightly, restriction loading pinion (2) can only to be staggered several angle in circumference coaxially with fixing master gear (6).
9. the method automatically eliminating limit corner gear tooth side gap as claimed in claim 1, it is characterized in that: when after two panels tooth sector (2, the 6) several angle that staggers, fan-shaped split gear (2,6) engages with driven gear (5) by gear extension spring (4) tension, the radius of curvature of contact points place two tooth sector equals two cylindrical end face circle radius in same point contact respectively, and the engagement of any time is counted along with the difference of structural parameter in cyclically-varying.
CN201410853028.XA 2014-12-31 2014-12-31 The automatic method for eliminating limit corner gear tooth side gap CN104565333B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104930177A (en) * 2015-05-28 2015-09-23 常州华达科捷光电仪器有限公司 Structure used for eliminating gear gap
CN104930161A (en) * 2015-05-28 2015-09-23 常州华达科捷光电仪器有限公司 Fine tuning structure
CN105277142A (en) * 2015-11-13 2016-01-27 兰州飞行控制有限责任公司 High-precision hand-cranking low-speed rotating table
CN105881973A (en) * 2016-05-19 2016-08-24 温州巨凯机械有限公司 Perforating device of paper bag making machine
CN107061635A (en) * 2016-01-13 2017-08-18 纳博特斯克有限公司 Geared system and output gear wheel plate

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JPH02164623A (en) * 1988-12-19 1990-06-25 Mitsubishi Motors Corp Power sheet for vehicle
EP1516782A1 (en) * 2003-09-19 2005-03-23 Saia-Burgess Murten AG Actuator for a headlamp
DE102009010458A1 (en) * 2009-02-13 2010-08-19 Automotive Lighting Reutlingen Gmbh Motor vehicle headlight, has multi-stage gear comprising two gear trains that are coupled to circuit and statically deformed against each other by flexible clamping element, and light module mounted on housing
DE102011016634A1 (en) * 2010-04-09 2012-05-16 Magna Auteca Ag Electric actuator for turning headlamp of motor vehicle, has toothed segment with toothing that is movably positioned with respect to output shaft such that toothing is biased against teeth of pinion in engagement direction
CN202441839U (en) * 2012-03-01 2012-09-19 北京机械设备研究所 Axially-limited anti-backlash gear
CN102996757A (en) * 2012-12-11 2013-03-27 北京遥测技术研究所 Double gear backlash structure for staggered teeth regulation spring force

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Publication number Priority date Publication date Assignee Title
JPH02164623A (en) * 1988-12-19 1990-06-25 Mitsubishi Motors Corp Power sheet for vehicle
EP1516782A1 (en) * 2003-09-19 2005-03-23 Saia-Burgess Murten AG Actuator for a headlamp
DE102009010458A1 (en) * 2009-02-13 2010-08-19 Automotive Lighting Reutlingen Gmbh Motor vehicle headlight, has multi-stage gear comprising two gear trains that are coupled to circuit and statically deformed against each other by flexible clamping element, and light module mounted on housing
DE102011016634A1 (en) * 2010-04-09 2012-05-16 Magna Auteca Ag Electric actuator for turning headlamp of motor vehicle, has toothed segment with toothing that is movably positioned with respect to output shaft such that toothing is biased against teeth of pinion in engagement direction
CN202441839U (en) * 2012-03-01 2012-09-19 北京机械设备研究所 Axially-limited anti-backlash gear
CN102996757A (en) * 2012-12-11 2013-03-27 北京遥测技术研究所 Double gear backlash structure for staggered teeth regulation spring force

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104930177A (en) * 2015-05-28 2015-09-23 常州华达科捷光电仪器有限公司 Structure used for eliminating gear gap
CN104930161A (en) * 2015-05-28 2015-09-23 常州华达科捷光电仪器有限公司 Fine tuning structure
CN105277142A (en) * 2015-11-13 2016-01-27 兰州飞行控制有限责任公司 High-precision hand-cranking low-speed rotating table
CN107061635A (en) * 2016-01-13 2017-08-18 纳博特斯克有限公司 Geared system and output gear wheel plate
CN105881973A (en) * 2016-05-19 2016-08-24 温州巨凯机械有限公司 Perforating device of paper bag making machine

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