CN102168748A - Backlash-free worm and gear revolving speed reducing mechanism - Google Patents
Backlash-free worm and gear revolving speed reducing mechanism Download PDFInfo
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- CN102168748A CN102168748A CN201010113585XA CN201010113585A CN102168748A CN 102168748 A CN102168748 A CN 102168748A CN 201010113585X A CN201010113585X A CN 201010113585XA CN 201010113585 A CN201010113585 A CN 201010113585A CN 102168748 A CN102168748 A CN 102168748A
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Abstract
The invention discloses a backlash-free worm and gear revolving speed reducing mechanism. Two pairs of worms in a box body are mounted in an integral worm bearing eccentric sleeve; the two pairs of worms are divided into two parts and are meshed with an intermediate output worm gear via an elongated hole of the eccentric sleeve; a driving shaft gear at the input end is meshed and rotated with a gear transmission system connected to a gear retainer; the gear transmission system can be radically linked with the worm; an adjusting screw, a location frame and an automatic worm distance adjuster are connected to an adjusting end; and the adjusting screw is rotated to pass through the location frame, so that an initial gap of an inclined toothed surface of the meshed part of the worm and gear can be eliminated, the automatic screw distance adjuster can eliminate the meshed gap of the subsequent inclined toothed surface caused by mechanical wear during the mechanism operation, and the backlash-free revolving output of the worm gear is realized through the gapless meshing of the inclined toothed surface of the meshed part of the worm and gear. The mechanism serving as a backlash-free precise revolving and location executing mechanism can be widely applied to precision optical sighting, numerical control machining and servo control systems related to the field of mechanical transmission.
Description
Affiliated technical field
The present invention relates to a kind of no backlash worm and gear rotary decelerating mechanism, belong to mechanical transmission fields, be applied to that precision optics is sighted, digital control processing, servocontrol, accurately revolution, location actuator.
Background technique
At present, known worm and gear rotary decelerating mechanism mainly is made of worm gear and worm screw, existing worm and gear rotary decelerating mechanism is subjected to the factor affecting of machining accuracy, technology, process aspect, there is the meshing gap of pitch face in varying degrees in the meshing position of worm and gear, and the worm gear gyroscopic output has the different backlash of degree.Used in the title, the backlash that causes of mechanical wear strengthens gradually, the revolution of worm and gear rotary decelerating mechanism, Location accuracy further reduce thereupon, exist pitch face gap and gap to strengthen gradually even if raising machining accuracy grade or regular replacing component also can't fundamentally solve and cause the revolution of worm and gear rotary decelerating mechanism, Location accuracy to continue the problem that reduces.
Summary of the invention
For solve the output backlash problem that worm and gear rotary decelerating mechanism exists always, the invention provides a kind of output does not have backlash worm and gear rotary decelerating mechanism.This no backlash worm and gear rotary decelerating mechanism not only can eliminate easily because the worm gear that machining accuracy of manufacturing, technology, technological factor cause is exported initial backlash, and can eliminate the follow-up backlash that mechanical wear in the using process forms automatically, this no backlash worm and gear rotary decelerating mechanism can keep high-precision rotary, the long-acting operation of location technology state automatically.
The present invention solves the scheme that its technical problem adopts:
Constituent element and structure connect:
Worm screw, the worm bearing eccentric bushing, eccentric lead ring and worm gear: two are all dextrad or left-hand worm screw and are fastened in separately the integrated type worm bearing eccentric bushing by a pair of tapered roller bearing and locking nut respectively, worm bearing eccentric bushing medial side cornice has the prolate perforate, two ends are installed with eccentric lead ring respectively, each eccentric lead ring all has an eccentric circular hole that the throw of eccentric same diameter is identical, worm bearing sleeve pipe two ends and eccentric circular hole are connected and fixed, eccentric opening eccentric direction unanimity, make two worm shaft bearing sleeves form the integrated type eccentric bushing, the worm axis in the worm bearing eccentric bushing is by the eccentric circle center of circle of the eccentric lead ring in two ends.Two worm screws see through the side prolate perforate and the worm gear of worm bearing eccentric bushing separately respectively in the worm gear both sides meshing, two worm shafts to parallel to each other and with worm-wheel shaft to vertical.The worm bearing eccentric bushing is connected and installed in the trepanning on rotary decelerating mechanism casing both sides by the eccentric lead ring at two ends, the eccentric circular hole eccentric direction at two ends and worm gear parallel to an axis, and the casing intermediate portion is installed worm gear.
Live axle, actuation gear, intermediate gear, driven gear and gear retainer: at this nothing backlash worm and gear rotary decelerating mechanism input end, by bearing live axle of location and installation on casing, live axle fixed installation actuation gear, two identical intermediate gears are respectively by bearing and jack shaft connection separately, and two worm screw ends fixedly mount identical driven gears.Two intermediate gears are by the meshing connection of gear retainer, and distance between shafts is two intermediate gear reference radius sums.Actuation gear and an intermediate gear are by the meshing connection of gear retainer, and distance between shafts is actuation gear and intermediate gear reference radius sum.The driven gear of this intermediate gear and homonymy worm screw end is by the meshing connection of gear retainer, and distance between shafts is intermediate gear and driven gear reference radius sum.Another intermediate gear and opposite side driven gear are by the meshing connection of gear retainer, and distance between shafts is intermediate gear and driven gear reference radius sum.
Locating stud, position shelf, adjustment silk and automatic worm screw range regulator: this nothing backlash worm and gear rotary decelerating mechanism adjusts end, and symmetry is mounted with two locating studs in the inner part two worm bearing eccentric bushing ends, two alignment pin to the worm screw parallel to an axis.The position shelf guiding groove is set in the middle of the casing adjustment end, and vertical through holes is the internal thread threaded pipe in the middle of the position shelf.Adjust silk and be divided into two-part up and down: partly for adjusting screw mandrel, the screw mandrel lower end is an optical axis to sub-body, and top is the screw mandrel that is shaped on the internal thread threaded pipe; Adjust silk top, top for adjusting the termination, the bottom is and adjustment silk internal thread pipe thread fit screw rod that the bottom screw mandrel is connected and fixed by locking nut and bottom adjustment screw mandrel after screwing in and adjusting silk internal thread threaded pipe.Adjust silk outer silk screw thread and position shelf internal thread screw-thread fit, adjust silk and screw in and pass position shelf, two ends are connected with casing, and position shelf is connected and installed in the casing adjustment end guiding groove by screwing in the adjustment silk, and two locating studs then insert and are fixed in the perforate of position shelf both sides.Automatically the worm screw range regulator is connected and installed in the position shelf both sides by the axle journal bolt, and afterburning end is connected to each other by elastomeric connector, and adjustment end in both sides props up locating stud with lasting, balanced, stable as stress.
The method of operation and action principle:
Input end: axle shaft gear rotates, two mutual meshing intermediate gears of meshing drive rotate, two intermediate gear meshing drive driven gear rotations on one side separately respectively, driven gear rotates in conjunction with the both sides worm screw, two synchronous meshing turbine rotation of worm screw that are all dextrad or left-hand.Live axle, can only rotate in mechanism's casing input end by the bearing location and installation, can not move radially.The driven gear of intermediate gear and actuation gear, worm screw end and intermediate gear are each other by the meshing connection of gear retainer, if worm screw moves radially, two intermediate gears can moving radially and take place radially to link with worm screw under gear retainer interconnect function, and each keeps original distance between shafts (mutually meshing gear compound graduation circle radius sum) constant in the moving process, thereby the worm shaft spacing changes to a certain extent and do not influence the meshing running of the interlock of input end gear.
Adjust end: rotation is adjusted silk and is adjusted a termination, makes the upper and lower mobile promotion locating stud of position shelf, can rotary worm bearing eccentric bushing by moving up and down locating stud, and the worm bearing eccentric bushing rotates along eccentric lead ring cylindrical, drives worm screw generation radial displacement.Locating stud moving up and down among a small circle causes the worm bearing eccentric bushing to drive two worm screws main direction taking place for along two worm screw axial planes and perpendicular to axial direction moving horizontally, do overall radial in the worm screw certain limit and move at input end and allow, and do not influence the meshing running of interlock of input end gear.Its direction that moves horizontally of worm screw is in opposite directions, and this moving horizontally changed the worm shaft spacing, has played the effect that changes the meshing gap of pitch face, the meshing position of worm and gear equally.Silk is adjusted in rotation, adjusts the initial meshing gap of pitch face that locating stud can be eliminated the meshing position of worm and gear by position shelf.Because of the horizontal Adjustable Range design load of worm screw smaller, it only is 1/tens of eccentric lead ring throw of eccentric, when worm screw is cooked Horizontal displacement in this moving range, vertical displacement can take place simultaneously, because of the vertical displacement amount too small relatively, so have only 1/tens of level amount to ignore, i.e. the vertical displacement of the interior worm screw of worm screw spacing adjustment range does not influence the normal operation of worm and gear rotary decelerating mechanism.Aforementioned for realizing that by adjusting silk and position shelf the crack that initially disappears of the meshing position of worm and gear pitch face is meshing.Locating stud is bigger apart from the distance in the eccentric lead ring center of circle, be designed to tens times of eccentric opening throw of eccentric in the eccentric lead ring (being the throw of eccentric of worm screw in eccentric lead ring), by the leverage principle, afterburning end elastomeric connector does not need very big make stress and can promote the locating stud action by automatic worm screw range regulator, realize the Horizontal displacement of worm screw by the rotation of worm bearing eccentric bushing, and it is meshing with the meshing position of maintenance worm and gear pitch face zero-clearance at this worm and gear rotary decelerating mechanism revolution locating stud that effectively props up all the time in service, by eliminating pitch face gap, the meshing position of worm and gear, realize that worm gear does not have the backlash gyroscopic output, accurately locate.At in mechanism's running persistency mechanical wear taking place, continue to play a role by automatic worm screw range regulator, it is meshing that the meshing position of worm and gear pitch face remains zero-clearance, guarantees that this mechanism can long-acting operation under the high precision technology state of no backlash revolution, location output.
The invention has the beneficial effects as follows: the solution of the invention existing turbine and worm rotary decelerating mechanism turn round because of existing the output backlash to cause, Location accuracy is difficult to improve, precision continues the technical barrier that descends in the follow-up using process.This nothing backlash turbine and worm rotary decelerating mechanism does not need to improve the batch process manufacturing that manufacture cost that the machining accuracy grade promptly can be relatively low realizes high precision apparatus under existing machinery processing technique, process conditions.
The present invention for big gun take aim at, stable, the control location of the camera lens optical axis of overlength focus optical system, image are followed the tracks of in the fields such as guidance, navigation, aviation, space, precision optics is sighted and safety precaution, digital control processing, servocontrol, the raising of the precision rotating of product, system, location, control technique and innovation, development have important function in the fields such as intelligent robot.
Description of drawings
The present invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is worm screw, worm gear and the worm bearing eccentric bushing structural drawing among the present invention.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B-B sectional view of Fig. 1.
Fig. 4 is live axle, actuation gear, jack shaft, intermediate gear, driven gear and the gear retainer structural drawing among the present invention.
Fig. 5 is the A-A sectional view of Fig. 4.
Fig. 6 is the B-B sectional view of Fig. 4.
Fig. 7 is locating stud, position shelf, adjustment silk and the automatic worm screw range regulator structural drawing among the present invention.
Fig. 8 is the A-A sectional view of Fig. 7.
Fig. 9 is the B-B sectional view of Fig. 7.
Figure 10 is the embodiment's plan view among the present invention.
Figure 11 is the A-A sectional view of Figure 10.
Figure 12 is the B-B sectional view of Figure 10.
Figure 13 is the embodiment's side view among the present invention.
Figure 14 is the A-A sectional view of Figure 13.
Among the figure: 1. casing, 2. worm screw, 3. worm bearing eccentric bushing, 4. prolate perforate, 5 eccentric lead rings, 6. locating stud, 7. tapered roller bearing, 8. worm gear, 9. live axle, 10. actuation gear, 11. intermediate gears, 12. bearings, 13. jack shaft, 14. driven gears, 15. gear retainers, 16 position shelfs, 17. adjust silk, 18. locking nuts, 19. automatic worm screw range regulator, 20. elastomeric connectors, 21. guiding grooves.
Embodiment
In Fig. 1, Fig. 2, Fig. 3, two worm screw (2), a pair of tapered roller bearing (7), locking nut (18-1), worm bearing eccentric bushing (3) are connected in the same way, two worm screws (2) see through prolate perforate (4) in worm gear (8) both sides meshing with worm gear (8), and worm bearing eccentric bushing (3) is connected and installed in the trepanning on rotary decelerating mechanism casing (1) both sides by the eccentric lead ring (5) at two ends.
In Fig. 4, Fig. 5, Fig. 6, live axle (9), actuation gear (10) are installed on the casing by bearing (12-1), intermediate gear (11) is by bearing (12-2) and jack shaft (13) connection separately, two worm screws (2) end fixed installation driven gear (14), actuation gear (10), intermediate gear (11), driven gear (14) are by the meshing connection of gear retainer (15).
In Fig. 7, Fig. 8, Fig. 9, two worm bearing eccentric bushings (3) adjustment is held in the inner part, and symmetry is mounted with two locating studs (6), position shelf (16) is connected and installed in the casing adjustment end guiding groove (21) by screwing in adjustment silk (17), two locating studs (6) insert position shelf (16) both sides perforate, automatically worm screw range regulator (19) is connected and installed in position shelf (16) both sides, props up locating stud (6) by elastomeric connector (20).
In Figure 11, Figure 12, Figure 14, input end: live axle (9), actuation gear (10) rotate, two mutual meshing intermediate gears of meshing drive (11) rotate, two intermediate gears (11) meshing drive driven gear (14) rotation on one side separately respectively, driven gear (14) rotates in conjunction with both sides worm screw (2), two the synchronous meshing turbine of worm screw (2) (8) rotations in the same way.Live axle (9) passes through bearing (12-1) location and installation in mechanism's casing (1) input end, can not move radially, intermediate gear (11) passes through the meshing connection of gear retainer (15) each other with the driven gear (14) and the intermediate gear (11) of actuation gear (10), worm screw (2) end, if worm screw (2) moves radially, two intermediate gears (11) can be with the moving radially and take place radially to link of worm screw (2) under gear retainer (15) interconnect function, and each keeps original distance between shafts constant in the moving process.Adjust end: rotation is adjusted silk (17) and is adjusted the termination, make the upper and lower mobile promotion locating stud of position shelf (16) (6), can rotary worm bearing eccentric bushing (3) by moving up and down locating stud (6), worm bearing eccentric bushing (3) rotates along eccentric lead ring (5) cylindrical, drives worm screw (2) the radial level displacement takes place.Its direction that moves horizontally of worm screw (2) is in opposite directions, and this moving horizontally changed worm screw (2) distance between shafts, has played the effect in the meshing gap of pitch face, the meshing position of change worm gear (8) worm screw (2) equally.Silk (17) is adjusted in rotation, adjusts the initial meshing gap of pitch face that locating stud (6) can be eliminated the meshing position of worm gear (8) worm screw (2) by position shelf (16), realizes initial no backlash revolution, location output; At in mechanism's running persistency mechanical wear taking place, afterburning end elastomeric connector (20) can promote locating stud (6) action by automatic worm screw range regulator (19), and at this worm and gear rotary decelerating mechanism revolution locating stud (6) that effectively props up all the time in service, to keep the meshing position of worm and gear pitch face zero-clearance meshing, guarantee that this mechanism can long-acting operation under the high precision technology state of no backlash revolution, location output.
Claims (9)
1. no backlash worm and gear rotary decelerating mechanism, the mutual structure of worm gear, worm screw, worm bearing eccentric bushing, live axle, actuation gear, intermediate gear, driven gear, gear retainer, locating stud, position shelf, adjustment silk and automatic worm screw range regulator connects in the casing, it is characterized in that: can adjust the worm shaft spacing by rotating the adjustment silk, eliminate the initial meshing gap of pitch face, the meshing position of worm and gear by adjusting the worm shaft spacing, realize initial zero backlash of worm gear gyroscopic output; In this rotary decelerating mechanism running, the worm screw range regulator is eliminated the follow-up meshing gap of pitch face, the meshing position of worm and gear that causes owing to mechanical wear by adjusting the worm shaft spacing automatically automatically, keeps the no backlash revolution operation of this rotary decelerating mechanism.
2. according to the described no backlash worm and gear rotary decelerating of right 1. mechanism, it is characterized in that: two are all dextrad or left-hand worm screw and are mounted in separately the integrated type worm bearing eccentric bushing by a pair of tapered roller bearing and locking nut separately, it is identical that these worm bearing eccentric bushing two ends are installed with throw of eccentric, the eccentric lead ring of eccentric direction unanimity, worm axis is the eccentric circle center of circle by the eccentric lead ring in worm bearing eccentric bushing two ends separately all, cover body sidewall middle part with the Vertical direction of eccentric lead ring eccentric direction on have along the prolate hole of body length direction lengthening.
3. according to the described no backlash worm and gear rotary decelerating of right 1. mechanism, it is characterized in that: two worm screws worm bearing eccentric bushing by separately respectively are installed in parallel in the worm gear both sides, worm and wheel is meshing mutually through the prolate hole of worm bearing eccentric bushing sidewall, and the worm bearing eccentric bushing is connected and installed in the trepanning on rotary decelerating mechanism casing both sides by the eccentric lead ring at body two ends.
4. according to the described no backlash worm and gear rotary decelerating of right 1. mechanism, it is characterized in that: when the worm bearing eccentric bushing rotated with the eccentric lead ring at body two ends, the worm screw that is installed in the cover moved radially thereupon.
5. according to the described no backlash worm and gear rotary decelerating of right 1. mechanism, it is characterized in that: the casing input end is by live axle of bearing location and installation, live axle is by a drive gear teeth unification intermediate gear, two the meshing both sides of mutual meshing intermediate gear difference driven gears, linking two is installed on the common meshing worm gear revolution of worm screw in the same way in the worm bearing eccentric bushing, is connected and fixed by the gear retainer between the meshing mutually gear of input end.
6. according to the described no backlash worm and gear rotary decelerating of right 1. mechanism, it is characterized in that: under being connected and fixed of gear retainer, being immovable point by the actuation gear axle center of radial location by bearing, intermediate gear and driven gear can be done the interlock radial displacement in company with two worm screws in it moves radially scope, meshing annexation remains unchanged between each gear.
7. according to the described no backlash worm and gear rotary decelerating of right 1. mechanism, it is characterized in that: worm bearing eccentric bushing adjustment end is equipped with locating stud, promotes the worm bearing eccentric bushing by locating stud and rotates along eccentric lead ring worm screw is radially moved.
8. according to the described no backlash worm and gear rotary decelerating of right 1. mechanism, it is characterized in that: adjust silk and make that position shelf is upper and lower to be moved by rotating, position shelf promotes locating stud and moves.
9. according to the described no backlash worm and gear rotary decelerating of right 1. mechanism, it is characterized in that: the worm screw range regulator is answered by elastomeric connector automatically, prop up locating stud to adjust end, promote the worm bearing eccentric bushing and drive worm screw and do level and move in opposite directions by locating stud being applied lasting, stable, the balanced stress of doing, keep worm gear not have backlash revolution operation by eliminating the pitch face gap all the time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010113585 CN102168748B (en) | 2010-02-25 | 2010-02-25 | Backlash-free worm and gear revolving speed reducing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010113585 CN102168748B (en) | 2010-02-25 | 2010-02-25 | Backlash-free worm and gear revolving speed reducing mechanism |
Publications (2)
| Publication Number | Publication Date |
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| CN102168748A true CN102168748A (en) | 2011-08-31 |
| CN102168748B CN102168748B (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010113585 Expired - Fee Related CN102168748B (en) | 2010-02-25 | 2010-02-25 | Backlash-free worm and gear revolving speed reducing mechanism |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335064A (en) * | 2013-07-04 | 2013-10-02 | 济南若泰数控科技有限公司 | Automatic clearance-removing double-worm speed reducer |
| CN103742600A (en) * | 2013-12-13 | 2014-04-23 | 中国航空工业集团公司北京航空精密机械研究所 | Large-load speed reducing and gap removing mechanism with plane secondary enveloping ring worm gear pairs |
| CN104493638A (en) * | 2014-12-30 | 2015-04-08 | 深圳市创世纪机械有限公司 | 360-degree dividing device for clamp-arm type tool changer |
| CN104812526A (en) * | 2012-12-18 | 2015-07-29 | 金成坤 | Rotary table device having multi-worm shaft |
| CN104948672A (en) * | 2015-07-01 | 2015-09-30 | 王烽 | Gapless worm gear worm rod speed reducer |
| CN106457499A (en) * | 2014-05-19 | 2017-02-22 | 金成坤 | Rotary index table apparatus |
| CN109569971A (en) * | 2018-12-26 | 2019-04-05 | 中山松德新材料装备有限公司 | The turntable of coating machine overturns structure |
| CN112540349A (en) * | 2020-11-16 | 2021-03-23 | 西安应用光学研究所 | Lodging mechanism of photoelectric and radar detection device |
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| JP2002067991A (en) * | 2000-09-04 | 2002-03-08 | Koyo Seiko Co Ltd | Motor-driven power steering device |
| CN101025216A (en) * | 2006-02-22 | 2007-08-29 | 中国科学院长春光学精密机械与物理研究所 | Micro-regulation mechanism for regulation clearance between worm gear driving pairs |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104812526A (en) * | 2012-12-18 | 2015-07-29 | 金成坤 | Rotary table device having multi-worm shaft |
| CN103335064A (en) * | 2013-07-04 | 2013-10-02 | 济南若泰数控科技有限公司 | Automatic clearance-removing double-worm speed reducer |
| CN103335064B (en) * | 2013-07-04 | 2017-11-10 | 济南若泰数控科技有限公司 | A kind of automatic anti-backlash twin worm reductor |
| CN103742600A (en) * | 2013-12-13 | 2014-04-23 | 中国航空工业集团公司北京航空精密机械研究所 | Large-load speed reducing and gap removing mechanism with plane secondary enveloping ring worm gear pairs |
| CN106457499A (en) * | 2014-05-19 | 2017-02-22 | 金成坤 | Rotary index table apparatus |
| CN104493638A (en) * | 2014-12-30 | 2015-04-08 | 深圳市创世纪机械有限公司 | 360-degree dividing device for clamp-arm type tool changer |
| CN104948672A (en) * | 2015-07-01 | 2015-09-30 | 王烽 | Gapless worm gear worm rod speed reducer |
| CN109569971A (en) * | 2018-12-26 | 2019-04-05 | 中山松德新材料装备有限公司 | The turntable of coating machine overturns structure |
| CN112540349A (en) * | 2020-11-16 | 2021-03-23 | 西安应用光学研究所 | Lodging mechanism of photoelectric and radar detection device |
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|---|---|
| CN102168748B (en) | 2013-05-15 |
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Effective date of registration: 20170504 Address after: 266000 No. 1 Changjiang Road, Jiaozhou economic and Technological Development Zone, Shandong, Qingdao Patentee after: QIHANG LAUNCHING TECH Co.,Ltd. Address before: 266300, East Building 1, building 1, building 226, No. 13, Zhengzhou East Road, Jiaozhou, Shandong Patentee before: Bi Hejun |
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Granted publication date: 20130515 |