CN105952848A - Double-eccentric-shaft small-tooth-difference NN type planetary reducer - Google Patents

Double-eccentric-shaft small-tooth-difference NN type planetary reducer Download PDF

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Publication number
CN105952848A
CN105952848A CN201610321209.7A CN201610321209A CN105952848A CN 105952848 A CN105952848 A CN 105952848A CN 201610321209 A CN201610321209 A CN 201610321209A CN 105952848 A CN105952848 A CN 105952848A
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gear
double
eccentric shaft
eccentric
centrage
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CN201610321209.7A
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CN105952848B (en
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李敏
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/08—Profiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • F16H2001/323—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear comprising eccentric crankshafts driving or driven by a gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • F16H2001/327—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear with orbital gear sets comprising an internally toothed ring gear

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)

Abstract

The invention discloses a double-eccentric-shaft small-tooth-difference NN type planetary reducer. The double-eccentric-shaft small-tooth-difference NN type planetary reducer comprises a double-eccentric shaft, an eccentric duplicate gear, a first inner gear and a second inner gear; a middle section part of the eccentric shaft includes a left end part and a right end part; the center line of the left end part is spaced from the center line of the eccentric shaft by a first distance; the center line of the right end part is spaced from the center line of the eccentric shaft by a second distance; the eccentric duplicate gear includes a left end gear and a right end gear, and is driven by the eccentric shaft to revolve around the center line of the eccentric shaft; meanwhile, the left end gear rotates around the center line of the left end part, and the right end gear rotates around the center line of the right end part; the left end gear is engaged with and disengaged from teeth of the first inner gear in sequence when rotating; the first inner gear and the left end gear have a gear difference; the right end gear is engaged with and disengaged from teeth of the second inner gear in sequence when rotating; and the second inner gear and the right end gear have a gear difference. The double-eccentric-shaft small-tooth-difference NN type planetary reducer has a double-eccentric effect on one eccentric shaft, so that the reducer is more compact in structure and more stable in operation.

Description

A kind of double-eccentric shaft few teeth difference NN type planetary reduction gear
Technical field
The present invention relates to decelerator technical field, particularly relate to a kind of double-eccentric shaft few teeth difference NN type planet and subtract Speed device.
Background technology
Decelerator, for playing coupling rotating speed and the effect of transmission moment between prime mover and working machine, its Main purpose is to reduce rotating speed, increase torque.Existing decelerator can be divided into worm screw according to drive mechanism difference Decelerator, planet-cycloid reducer, planetary reduction gear and harmonic speed reducer etc., they are each applicable to difference Place.
Worm reducer volume is excessive, planet-cycloid reducer structure is the most complicated, and harmonic speed reducer has Flexbile gear is constantly making high frequency distortions, the shortcoming of the easy fatigue rupture of thin-walled, and therefore, the most more common is Planetary reduction gear.
Effect that planetary reduction gear mainly utilizes number of gear teeth difference to bring realizes above-mentioned reduction rotating speed, increase The effect of moment.Planetary speed reducer with small tooth number difference is the one of planetary reduction gear, and it mainly utilizes has number of teeth phase The external gear of difference realizes reduction rotating speed with the engaging tooth wheel set of internal gear composition, increases the effect of moment.
A kind of " few teeth difference disclosed in existing little tooth difference speed reducer, such as Publication No. CN102221069A Decelerator ", it arranges eccentric spindle nose in power shaft one end, utilizes swing bevel gear and fixed cone gear to strengthen Rotating ratio, but this kind of structure is due to only with side eccentric structure, when running up, eccentric the moment of inertia Excessive, cause noise in operating excessive, vibration more violent.
And for example a kind of " Double-eccentric shaft small tooth difference speed reducer " disclosed in Publication No. CN2458461A, it leads to Cross the stationarity that two eccentric shafts are set to improve motion, but its structure is the most complicated.
Summary of the invention
The technical problem to be solved is, for the above-mentioned deficiency of prior art, proposes one Compact conformation, the double-eccentric shaft few teeth difference NN type planetary reduction gear operated steadily.
The present invention solves its technical problem and employed technical scheme comprise that, proposes a kind of double-eccentric shaft few teeth difference NN Type planetary reduction gear, comprising:
Double-eccentric shaft, is connected with power shaft, including left section of portion, center section part and right section of portion；Described double inclined The center section part of mandrel includes left part and right part, described left part centrage and double-eccentric shaft centerline First distance, described right part centrage and double-eccentric shaft centerline second distance；
Eccentric duplicate gear, including left end gear and right-hand member gear；Described eccentric duplicate gear is by double bias Axle drives with left end gear around double-eccentric shaft centrage revolves round the sun while around the centrage rotation of described left part, right-hand member Gear is around the centrage rotation of described right part；
First internal gear, described left end gear time rotational engages successively with the tooth of described first internal gear and de- Open；It is poor to there is tooth in described first internal gear and left end gear；
Secondary annulus, is connected with export structure, described right-hand member gear time rotational and described secondary annulus Tooth engage successively and disengage；It is poor to there is tooth in described secondary annulus and right-hand member gear.
Further, described first internal gear or secondary annulus maintain static.
Further, described left end gear, right-hand member gear, the first internal gear and the profile of tooth of secondary annulus It is S-shaped.
Further, described left part centrage and right part centrage are respectively in double-eccentric shaft centrage two Side.
Further, described eccentric duplicate gear forms bearing block relative to the side of double-eccentric shaft；A described left side All it is rotatably assorted by the first rolling bearing between end tooth wheel and right-hand member gear and double-eccentric shaft.
Further, left section of portion of described double-eccentric shaft is rolled by left circular cone with described first internal gear inner circle Sub-bearing is rotatably assorted, and right section of portion of described double-eccentric shaft is rolled by right circular cone with described secondary annulus inner circle Sub-bearing is rotatably assorted.
Further, the centrage of described left taper roll bearing and right taper roll bearing is eccentric with double Shaft centre line overlaps.
Further, the extended line of described left taper roll bearing raceway and right taper roll bearing raceway Extended line be all intersected on double-eccentric shaft centrage.
Further, the outer inner round side of described first internal gear forms bearing block, described first internal gear cylindrical It is rotatably assorted by the second rolling bearing between outside inner side and secondary annulus cylindrical.
Further, described few teeth difference NN type planetary reduction gear left end is additionally provided with left sealing ring and by a left side The end cover that sealing ring is fixing, right-hand member is additionally provided with right sealing ring.
The present invention realizes double eccentric effect on a double-eccentric shaft, is coordinated by double eccentric duplicate gears Double-eccentric shaft operates, and then on the basis of realizing slowing down so that the structure of decelerator of the present invention is the compactest And operating is the most steady.
Accompanying drawing explanation
Fig. 1 is the perspective view of decelerator in a preferred embodiment of the present invention；
Fig. 2 is the left view schematic diagram of decelerator in a preferred embodiment of the present invention；
Fig. 3 is that in a preferred embodiment of the present invention, the right side of decelerator regards schematic diagram；
Fig. 4 is the schematic side view of decelerator in a preferred embodiment of the present invention；
Fig. 5 is A-A sectional view in Fig. 4；
Fig. 6 is the perspective view of double-eccentric shaft.
Detailed description of the invention
The following is the specific embodiment of the present invention and combine accompanying drawing, technical scheme is made further Description, but the present invention is not limited to these embodiments.
The orientation such as left and right, upper and lower described in the present embodiment is only used for conveniently understanding, not as to this Apply for the restriction of the concrete position relation of each structure.The present embodiment middle left and right, upper and lower orientation according to Fig. 1- Orientation shown in Fig. 5 understands.Wherein left side and right side can be understood to the input side of decelerator respectively And outlet side.
Refer to Fig. 1-Fig. 6, in this preferred embodiment, double-eccentric shaft few teeth difference NN type planetary reduction gear master Double-eccentric shaft 100 to be included, eccentric duplicate gear the 200, first internal gear 300 and secondary annulus 400.
The double-eccentric shaft 100 of the present embodiment includes left section of portion 110, center section part 120 and right section of portion 130. Left section of portion 110 is all generally cylindrical with right section of portion 130, and has identical centrage, i.e. double-eccentric shaft The centrage O-0 of 100 entirety.Center section part 120 extends the most laterally and defines left part 121 and the right side End 122, and the centrage O of left part 1211-O1It is upwardly deviated from centrage O-O the first distance, right-hand member The centrage O in portion 1222-O2It is deflected downwardly centrage O-O second distance.Thus, double-eccentric shaft 100 shape Become double bias.
Eccentric duplicate gear 200 includes left end gear 210 and right-hand member gear 220, left end gear 210 equally Corresponding with the left part 121 of double-eccentric shaft center section part 120, right part 122 respectively with right-hand member gear 220. The side of the eccentric relative double-eccentric shaft of duplicate gear 200 forms bearing block, thus, left end gear 210 inner circle Outside side and left part 121, and outside right-hand member gear 220 inner circle side and right part 122 between all pass through First rolling bearing 10 is rotatably assorted.
When double-eccentric shaft 100 rotates, by two first rolling bearings 10, rotation is transferred to eccentric duplex-gear Wheel 200.First rolling bearing 10 the most also makes eccentric duplicate gear 200 have stable support, can disappear Except from the interference to drive mechanism of the axially and radially load, maintaining body operating is stable.
After rotation is passed to eccentric duplicate gear 200 by double-eccentric shaft 100, eccentric duplicate gear 200 is whole Body revolves round the sun around eccentric shaft 100 centrage O-O；In eccentric duplicate gear 200 entirety around double-eccentric shaft 100 While centrage O-O revolution, left end gear 210 engages successively with the tooth of the first internal gear 300 and disengages, Owing to the first internal gear 300 is fixed on body, hence in so that left end gear 210 is around left part 121 Centrage O1-O1Rotation.Left end gear 210 is around left part 121 centrage O1-O1Time rotational makes right-hand member Gear 220 is around right part 122 centrage O2-O2Rotation, and engage successively with secondary annulus 400 and de- Open so that secondary annulus rotates output.
It is poor to there is the number of teeth in left end gear 210 and the first internal gear 300.When number of teeth difference is 1 tooth, the Promotion left end gear 210 is turned over 1 tooth by internal gear 300 certainly；If assuming, left end gear 210 number of teeth is Z1, then when eccentric duplicate gear revolves round the sun 1 week, left end gear rotation 1/Z1Turn.
In like manner, right-hand member gear 220 time rotational, engage successively with the tooth of secondary annulus 400 and disengage, Make right-hand member gear 220 poor with the number of teeth of secondary annulus 400 and left end gear 210 and the first internal gear 300 Number of teeth difference equal.
It is envisioned that ground, it is possible to secondary annulus 400 is fixed, and the first internal gear 300 is as output Gear.
This double-eccentric shaft few teeth difference NN type planetary reduction gear is reduced rotating speed by number of teeth difference, is improved rotating shaft Effect；Unstable by the rotation that causes when double eccentric structures are to overcome double-eccentric shaft only one end bias, The problem that noise is big.
Due to left end gear 210 and the first internal gear 300, right-hand member gear 220 and secondary annulus 400 it Between often engagement and disengaging, in order to reduce contact impact, increase the contact strength between gear；In the present embodiment, Left end gear 210, right-hand member gear the 220, first internal gear 300, the profile of tooth of secondary annulus 400 are S Shape.And S-shaped gear also has flexibility, it is possible to decrease Dedenda's bending stress, improve the output loading of decelerator.
It is further preferable that each S-shaped gear of the present embodiment can use 25 degree of profile of tooth pressure angle gears, to enter Once improve bending strength, reduce contact impact, the contact strength increased between gear.
Taper roll bearing is passed through between double-eccentric shaft 100 and the first internal gear 300, secondary annulus 400 It is rotatably assorted；That is, pass through with the first internal gear 300 inner circle outside left section of portion 110 of double-eccentric shaft 100 Left taper roll bearing 20 is rotatably assorted, outside the right part 120 of double-eccentric shaft 100 and secondary annulus 400 inner circles are rotatably assorted by right taper roll bearing 30.
In a preferred embodiment, left taper roll bearing 20 and the centrage of right taper roll bearing 30 Overlap with the centrage O-O of double-eccentric shaft 100 so that bearing can bear the connected load (footpath acted on simultaneously To and axial load).It is further preferable that left taper roll bearing 20 and right taper roll bearing 30 raceway Extended line be intersected on centrage O-O, it is achieved real rolling and low friction.
In order to improve load torque and the robust motion of transmission, the first internal gear 300 and secondary annulus It is rotatably assorted also by rolling bearing between 400.The i.e. first outer inner round side of internal gear 300 forms bearing block, By second axis of rolling between outside the described first outer inner round side of internal gear 300 and secondary annulus cylindrical 400 Hold 40 to be rotatably assorted.
Second rolling bearing 40 makes secondary annulus 400 have stable support, can eliminate from axle simultaneously To with the radial load interference to drive mechanism, maintaining body steady running.
In a preferred embodiment, the most peripherally disposed on the outer circumference surface of secondary annulus 400 have Multiple for connecting other equipment to export the connecting hole 410 of power.
It addition, in order to balance gravity motion that double-eccentric shaft bias causes and that eccentric mass produces is centrifugal used Property power, is also drilled with balance pipe on double-eccentric shaft 100.
This double-eccentric shaft few teeth difference NN type planetary reduction gear as industrial equipment actually used time, also need ensure Greasy property between each bearing and part, in order to prevent dust etc. from falling into inside decelerator, also at decelerator Left end is provided with left sealing ring 50 and for the sealing ring end cap 60 that left sealing ring is fixing；At decelerator Right-hand member arranges right sealing ring 70.
The input flange 80 saying that decelerator and motor link together it is additionally provided with at decelerator left end.
Specific embodiment described herein is only to present invention spirit explanation for example.Institute of the present invention Belong to those skilled in the art described specific embodiment to make various amendment or supplement Or use similar mode to substitute, but without departing from the spirit of the present invention or surmount appended claims Defined scope.

Claims (10)

1. a double-eccentric shaft few teeth difference NN type planetary reduction gear, it is characterised in that: including:
Double-eccentric shaft, is connected with power shaft, including left section of portion, center section part and right section of portion；Described double inclined The center section part of mandrel includes left part and right part, described left part centrage and double-eccentric shaft centerline First distance, described right part centrage and double-eccentric shaft centerline second distance；
Eccentric duplicate gear, including left end gear and right-hand member gear；Described eccentric duplicate gear is by double bias Axle drives with left end gear around double-eccentric shaft centrage revolves round the sun while around the centrage rotation of described left part, right-hand member Gear is around the centrage rotation of described right part；
First internal gear, described left end gear time rotational engages successively with the tooth of described first internal gear and de- Open；It is poor to there is tooth in described first internal gear and left end gear；
Secondary annulus, is connected with export structure, described right-hand member gear time rotational and described secondary annulus Tooth engage successively and disengage；It is poor to there is tooth in described secondary annulus and right-hand member gear.
Double-eccentric shaft few teeth difference NN type planetary reduction gear the most according to claim 1, its feature exists In: described first internal gear or secondary annulus maintain static.
Double-eccentric shaft few teeth difference NN type planetary reduction gear the most according to claim 1, its feature exists In: the profile of tooth of described left end gear, right-hand member gear, the first internal gear and secondary annulus is S-shaped.
Double-eccentric shaft few teeth difference NN type planetary reduction gear the most according to claim 1, its feature exists In: described left part centrage and right part centrage are respectively in double-eccentric shaft centrage both sides.
Double-eccentric shaft few teeth difference NN type planetary reduction gear the most according to claim 1, its feature exists In: described eccentric duplicate gear forms bearing block relative to the side of double-eccentric shaft；Described left end gear and right-hand member All it is rotatably assorted by the first rolling bearing between gear and double-eccentric shaft.
The most according to claim 1 or 5, double-eccentric shaft few teeth difference NN type planetary reduction gear, it is special Levy and be: left section of portion of described double-eccentric shaft is turned by left taper roll bearing with described first internal gear inner circle Dynamic cooperation, right section of portion of described double-eccentric shaft is turned by right taper roll bearing with described secondary annulus inner circle Dynamic cooperation.
Double-eccentric shaft few teeth difference NN type planetary reduction gear the most according to claim 6, its feature exists In: the centrage of described left taper roll bearing and right taper roll bearing and double-eccentric shaft centrage weight Close.
Double-eccentric shaft few teeth difference NN type planetary reduction gear the most according to claim 7, its feature exists In: the extended line of described left taper roll bearing raceway and the extended line of right taper roll bearing raceway are all handed over It is compiled on double-eccentric shaft centrage.
Double-eccentric shaft few teeth difference NN type planetary reduction gear the most according to claim 1, its feature exists In: the outer inner round side of described first internal gear forms bearing block, in the outer inner round side and second of described first internal gear It is rotatably assorted by the second rolling bearing between outside top circle.
Double-eccentric shaft few teeth difference NN type planetary reduction gear the most according to claim 1, its feature exists In: described few teeth difference NN type planetary reduction gear left end is additionally provided with left sealing ring and is fixed by left sealing ring End cover, right-hand member is additionally provided with right sealing ring.
CN201610321209.7A 2016-05-16 2016-05-16 A kind of double-eccentric shaft few teeth difference NN type planetary reduction gear Active CN105952848B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106352024A (en) * 2016-11-25 2017-01-25 许昌学院 Single-eccentric short transmission chain speed reducer
CN108679167A (en) * 2018-07-06 2018-10-19 华南理工大学 A kind of fewer differential teeth planetary line gear retarder
CN109737187A (en) * 2019-03-11 2019-05-10 南京高速齿轮制造有限公司 A kind of deceleration device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87200923U (en) * 1987-01-16 1988-02-24 任乔圭 Secondary eccentric contained speed-reducer with small tooth number difference
CN2260921Y (en) * 1996-06-12 1997-08-27 李振凯 Involut less-progressive-error external-gear output type speed reducer
CN202251727U (en) * 2011-08-29 2012-05-30 浙江恒丰泰减速机制造有限公司 Precise cycloid oscillating tooth transmission reducer
CN102777545A (en) * 2012-08-15 2012-11-14 中国航天科技集团公司烽火机械厂 Aircraft and long-service-life electric steering engine thereof
CN205639487U (en) * 2016-05-16 2016-10-12 李敏 Poor NN type planet gear of few tooth of two eccentric shafts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN87200923U (en) * 1987-01-16 1988-02-24 任乔圭 Secondary eccentric contained speed-reducer with small tooth number difference
CN2260921Y (en) * 1996-06-12 1997-08-27 李振凯 Involut less-progressive-error external-gear output type speed reducer
CN202251727U (en) * 2011-08-29 2012-05-30 浙江恒丰泰减速机制造有限公司 Precise cycloid oscillating tooth transmission reducer
CN102777545A (en) * 2012-08-15 2012-11-14 中国航天科技集团公司烽火机械厂 Aircraft and long-service-life electric steering engine thereof
CN205639487U (en) * 2016-05-16 2016-10-12 李敏 Poor NN type planet gear of few tooth of two eccentric shafts

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106352024A (en) * 2016-11-25 2017-01-25 许昌学院 Single-eccentric short transmission chain speed reducer
CN106352024B (en) * 2016-11-25 2019-03-22 许昌学院 A kind of single eccentric short transmission chain retarder
CN108679167A (en) * 2018-07-06 2018-10-19 华南理工大学 A kind of fewer differential teeth planetary line gear retarder
CN108679167B (en) * 2018-07-06 2024-05-14 华南理工大学 Planetary line gear reducer with small tooth difference
CN109737187A (en) * 2019-03-11 2019-05-10 南京高速齿轮制造有限公司 A kind of deceleration device
CN109737187B (en) * 2019-03-11 2023-11-10 南京南传智能技术有限公司 Speed reducer

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