CN205639487U - Poor NN type planet gear of few tooth of two eccentric shafts - Google Patents
Poor NN type planet gear of few tooth of two eccentric shafts Download PDFInfo
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- CN205639487U CN205639487U CN201620443284.6U CN201620443284U CN205639487U CN 205639487 U CN205639487 U CN 205639487U CN 201620443284 U CN201620443284 U CN 201620443284U CN 205639487 U CN205639487 U CN 205639487U
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Abstract
The utility model discloses a poor NN type planet gear of few tooth of two eccentric shafts, include two eccentric shafts, the middle section portion of eccentric shaft includes left end portion and right -hand member portion, and left end portion central line and eccentric shaft central line be first distance apart, and right -hand member portion central line and eccentric shaft central line are at a distance of A second distance, eccentric dual gea is including left end gear and right -hand member gear, eccentric dual gea is driven in order to wind around eccentric shaft central line revolution while left end gear by the eccentric shaft the central line rotation of left end portion, the right -hand member gear winds the central line rotation of right -hand member portion, first internal gear, during the rotation of left end gear with the tooth of first internal gear meshes in proper order and throws off, it is poor that there are the tooth in first internal gear and left end gear, the secondary annulus, during the rotation of right -hand member gear with the tooth of secondary annulus meshes in proper order and throws off, it is poor that there are the tooth in secondary annulus and right -hand member gear. The utility model discloses realize two decentered effects on an eccentric shaft, make the utility model discloses the structure of reduction gear is more compact and the operation is more steady.
Description
Technical field
This utility model relates to decelerator technical field, particularly relates to a kind of double-eccentric shaft few teeth difference NN type planetary reduction gear.
Background technology
Decelerator, for playing coupling rotating speed and the effect of transmission moment between prime mover and working machine, its main purpose is reduction rotating speed, increases torque.Existing decelerator can be divided into worm reducer, planet-cycloid reducer, planetary reduction gear and harmonic speed reducer etc. according to drive mechanism difference, and they are each applicable to different places.
Worm reducer volume is excessive, planet-cycloid reducer structure is the most complicated, and harmonic speed reducer has flexbile gear and constantly making high frequency distortions, the shortcoming of the easy fatigue rupture of thin-walled, therefore, the most more common for planetary reduction gear.
Effect that planetary reduction gear mainly utilizes number of gear teeth difference to bring realizes above-mentioned reduction rotating speed, increases the effect of moment.Planetary speed reducer with small tooth number difference is the one of planetary reduction gear, and it mainly utilizes the external gear with number of teeth difference to realize reduction rotating speed with the engaging tooth wheel set of internal gear composition, increase the effect of moment.
Existing little tooth difference speed reducer, such as disclosed in Publication No. CN102221069A a kind of " little tooth difference speed reducer ", it arranges eccentric spindle nose in power shaft one end, swing bevel gear and fixed cone gear is utilized 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 is excessive, causes that noise in operating is excessive, vibration is more violent.
And for example a kind of " Double-eccentric shaft small tooth difference speed reducer " disclosed in Publication No. CN2458461A, it is by arranging two eccentric shafts stationarity with raising motion, but its structure is the most complicated.
Utility model content
Technical problem to be solved in the utility model is, for the above-mentioned deficiency of prior art, the double-eccentric shaft few teeth difference NN type planetary reduction gear propose a kind of compact conformation, operating steadily.
This utility model 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；The center section part of described double-eccentric shaft includes left part and right part, described left part centrage and double-eccentric shaft centerline the 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 driven by double-eccentric shaft so that around the revolution of double-eccentric shaft centrage, left end gear is around the centrage rotation of described left part simultaneously, and 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 disengages；It is poor to there is tooth in described first internal gear and left end gear；
Secondary annulus, is connected with export structure, and described right-hand member gear time rotational engages successively with the tooth of described secondary annulus and disengages；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, the profile of tooth of described left end gear, right-hand member gear, the first internal gear and secondary annulus is S-shaped.
Further, described left part centrage and right part centrage are respectively in double-eccentric shaft centrage both sides.
Further, described eccentric duplicate gear forms bearing block relative to the side of double-eccentric shaft；All it is rotatably assorted by the first rolling bearing between described left end gear and right-hand member gear and double-eccentric shaft.
Further, left section of portion of described double-eccentric shaft is rotatably assorted by left taper roll bearing with described first internal gear inner circle, and right section of portion of described double-eccentric shaft is rotatably assorted by right taper roll bearing with described secondary annulus inner circle.
Further, the centrage of described left taper roll bearing and right taper roll bearing overlaps with double-eccentric shaft centrage.
Further, the extended line of described left taper roll bearing raceway and the extended line of right taper roll bearing raceway are all intersected on double-eccentric shaft centrage.
Further, the outer inner round side of described first internal gear forms bearing block, outside the outer inner round side of described first internal gear and secondary annulus cylindrical between be rotatably assorted by the second rolling bearing.
Further, described few teeth difference NN type planetary reduction gear left end is additionally provided with left sealing ring and by end cover fixing for left sealing ring, and right-hand member is additionally provided with right sealing ring.
This utility model realizes double eccentric effect on a double-eccentric shaft, coordinates double-eccentric shaft to operate by double eccentric duplicate gears, and then on the basis of realizing slowing down so that the structure of this utility model decelerator is the compactest and operating is the most steady.
Accompanying drawing explanation
Fig. 1 is the perspective view of decelerator in this utility model one preferred embodiment；
Fig. 2 is the left view schematic diagram of decelerator in this utility model one preferred embodiment；
Fig. 3 is that in this utility model one preferred embodiment, the right side of decelerator regards schematic diagram；
Fig. 4 is the schematic side view of decelerator in this utility model one preferred embodiment；
Fig. 5 is A-A sectional view in Fig. 2；
Fig. 6 is the perspective view of double-eccentric shaft.
Detailed description of the invention
The following is specific embodiment of the utility model and combine accompanying drawing, the technical solution of the utility model is further described, but this utility model 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 the restriction of the concrete position relation of structure each to the application.The present embodiment middle left and right, upper and lower orientation understand according to the orientation shown in Fig. 1-Fig. 5.Wherein left side and right side can be understood to input side and the outlet side of decelerator respectively.
Refer to Fig. 1-Fig. 6, in this preferred embodiment, double-eccentric shaft few teeth difference NN type planetary reduction gear mainly includes double-eccentric shaft 100, 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. the centrage O-0 of double-eccentric shaft 100 entirety.Center section part 120 extends the most laterally and defines left part 121 and right part 122, and the centrage O of left part 1211-O1It is upwardly deviated from centrage O-O the first distance, the centrage O of right part 1222-O2It is deflected downwardly centrage O-O second distance.Thus, double-eccentric shaft 100 defines double eccentric.
Eccentric duplicate gear 200 includes left end gear 210 and right-hand member gear 220 equally, and left end gear 210 and right-hand member gear 220 are corresponding with the left part 121 of double-eccentric shaft center section part 120, right part 122 respectively.The side of the eccentric relative double-eccentric shaft of duplicate gear 200 forms bearing block, thus, outside left end gear 210 inner circle side and left part 121, and outside right-hand member gear 220 inner circle side and right part 122 between be all rotatably assorted by the first rolling bearing 10.
When double-eccentric shaft 100 rotates, by two first rolling bearings 10, rotation is transferred to eccentric duplicate gear 200.First rolling bearing 10 the most also makes eccentric duplicate gear 200 have stable support, can eliminate from the interference to drive mechanism of the axially and radially load, and maintaining body operating is stable.
After rotation is passed to eccentric duplicate gear 200 by double-eccentric shaft 100, eccentric duplicate gear 200 entirety revolves round the sun around eccentric shaft 100 centrage O-O；In eccentric duplicate gear 200 entirety while double-eccentric shaft 100 centrage O-O revolves round the sun, 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 around right part 122 centrage O2-O2Rotation, and engage successively with secondary annulus 400 and disengagement make secondary annulus rotate 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, promotion left end gear 210 is turned over 1 tooth by the first 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, engages successively with the tooth of secondary annulus 400 and disengages, making right-hand member gear 220 poor with the number of teeth of secondary annulus 400 poor equal with the number of teeth of the first internal gear 300 with left end gear 210.
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 the effect of rotating shaft；The problem unstable, noise is big is rotated by cause when double eccentric structures are to overcome double-eccentric shaft only one end bias.
Due to left end gear 210 and the first internal gear 300, often engage between right-hand member gear 220 with secondary annulus 400 and disengage, in order to reduce contact impact, increasing 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-shaped.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 to improve bending strength, to reduce contact impact, the contact strength increased between gear.
It is rotatably assorted by taper roll bearing between double-eccentric shaft 100 and the first internal gear 300, secondary annulus 400；That is, be rotatably assorted by left taper roll bearing 20 with the first internal gear 300 inner circle outside left section of portion 110 of double-eccentric shaft 100, it is rotatably assorted by right taper roll bearing 30 with secondary annulus 400 inner circle outside the right part 120 of double-eccentric shaft 100.
In a preferred embodiment, left taper roll bearing 20 overlaps with the centrage O-O of double-eccentric shaft 100 with the centrage of right taper roll bearing 30 so that bearing can bear connected load (the radial and axial load acted on) simultaneously.It is further preferable that the extended line of left taper roll bearing 20 and right taper roll bearing 30 raceway is 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, it is rotatably assorted also by rolling bearing between the first internal gear 300 and secondary annulus 400.I.e. first the outer inner round side of internal gear 300 formed bearing block, outside the described first outer inner round side of internal gear 300 and secondary annulus cylindrical 400 between pass through the second rolling bearing 40 be rotatably assorted.
Second rolling bearing 40 makes secondary annulus 400 have stable support, can eliminate from the interference to drive mechanism of the axially and radially load, maintaining body steady running simultaneously.
In a preferred embodiment, on the outer circumference surface of secondary annulus 400 the most peripherally disposed have multiple for connect other equipment with export power connecting hole 410.
It addition, in order to balance gravity motion and the centrifugal intertia force of eccentric mass generation that double-eccentric shaft bias causes, be 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 to ensure the greasy property between each bearing and part, in order to prevent dust etc. from falling into inside decelerator, also it is provided with left sealing ring 50 and for the sealing ring end cap 60 that left sealing ring is fixing at decelerator left end；At decelerator right-hand member, right sealing ring 70 is set.
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 this utility model spirit explanation for example.Described specific embodiment can be made various amendment or supplements or use similar mode to substitute by this utility model person of ordinary skill in the field, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620443284.6U CN205639487U (en) | 2016-05-16 | 2016-05-16 | Poor NN type planet gear of few tooth of two eccentric shafts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620443284.6U CN205639487U (en) | 2016-05-16 | 2016-05-16 | Poor NN type planet gear of few tooth of two eccentric shafts |
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| CN205639487U true CN205639487U (en) | 2016-10-12 |
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| CN201620443284.6U Active CN205639487U (en) | 2016-05-16 | 2016-05-16 | Poor NN type planet gear of few tooth of two eccentric shafts |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952848A (en) * | 2016-05-16 | 2016-09-21 | 李敏 | Double-eccentric-shaft small-tooth-difference NN type planetary reducer |
| CN106763629A (en) * | 2017-03-17 | 2017-05-31 | 深圳市创晶辉精密塑胶模具有限公司 | Rear view mirror driver and its small teeth number difference planet gear box transmission mechanism |
| CN106763533A (en) * | 2017-03-23 | 2017-05-31 | 深圳市创晶辉精密塑胶模具有限公司 | Electronic lock planetary speed reducer with small tooth number difference |
-
2016
- 2016-05-16 CN CN201620443284.6U patent/CN205639487U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105952848A (en) * | 2016-05-16 | 2016-09-21 | 李敏 | Double-eccentric-shaft small-tooth-difference NN type planetary reducer |
| CN105952848B (en) * | 2016-05-16 | 2019-02-19 | 李敏 | A kind of double-eccentric shaft few teeth difference NN type planetary reduction gear |
| CN106763629A (en) * | 2017-03-17 | 2017-05-31 | 深圳市创晶辉精密塑胶模具有限公司 | Rear view mirror driver and its small teeth number difference planet gear box transmission mechanism |
| CN106763629B (en) * | 2017-03-17 | 2021-04-20 | 深圳市创晶辉精密塑胶模具有限公司 | Rearview mirror surface driver and small tooth difference planetary gear box transmission mechanism thereof |
| CN106763533A (en) * | 2017-03-23 | 2017-05-31 | 深圳市创晶辉精密塑胶模具有限公司 | Electronic lock planetary speed reducer with small tooth number difference |
| CN106763533B (en) * | 2017-03-23 | 2020-04-28 | 深圳市创晶辉精密塑胶模具有限公司 | Electronic lock small tooth difference planetary speed reducer |
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