CN106989143A - Planetary reducer - Google Patents
Planetary reducer Download PDFInfo
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- CN106989143A CN106989143A CN201710342438.1A CN201710342438A CN106989143A CN 106989143 A CN106989143 A CN 106989143A CN 201710342438 A CN201710342438 A CN 201710342438A CN 106989143 A CN106989143 A CN 106989143A
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- planet wheel
- wheel spindle
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- planetary
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 28
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 46
- 238000005096 rolling process Methods 0.000 claims description 16
- 230000007704 transition Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
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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
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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
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
A kind of planetary reducer, including：Ring gear, it has the upstream end and downstream set along its axis, and parallel to the internal tooth that axis extends；Input shaft, its along internal tooth coil axis radially medially and axial restraint and be rotatably connected to the upstream end of ring gear, for receiving high speed rotary motion；Output shaft, its along internal tooth coil axis radially medially and axial restraint and be rotatably connected to the downstream of ring gear, for output low-speed rotation；At least primary planet reducing gear, it includes the planet wheel spindle for being used to assemble planetary gear；And at least one centring means, the centring means is annular, and its relative to ring gear by radially medially and axial restraint set, and one end with the planet wheel spindle is rollably radially contacted with always respectively, to carry out the radial positioning of the planetary gear speed reducing mechanism.
Description
Technical field
The present invention relates to a kind of planetary reducer, more particularly, to it is a kind of have axially and radially locate function
Planetary reducer.
Background technology
Ring gear or planet carrier are set to floating structure to planetary reduction gear in the design, cause to include planetary gear and planet carrier
Integrated member can be produced in use due to force unbalance in radial floating, therefore running, especially initially open
When dynamic, great uneven stiction can be produced, and obviously noise can be produced when running at high speed, is subtracted for planet
Fast device can itself increase friction loss, reduce efficiency, while shortening the service life of main working parts.
The discussion above merely provides general background information and is not intended to be used to help determine claimed master
The scope of topic.
The content of the invention
The purpose of the present invention aims to solve the problem that at least one aspect of the above-mentioned problems in the prior art and defect.
In one aspect of the invention, the present invention provides a kind of planetary reducer, including：Ring gear, it has edge
Upstream end and downstream that its axis is set, and parallel to the internal tooth that axis extends；Input shaft, it is radially occupied along internal tooth coil axis
Middle ground and axial restraint and be rotatably connected to the upstream end of ring gear, for receiving high speed rotary motion；Output shaft
(8), its along internal tooth coil axis radially medially and axial restraint and be rotatably connected to the downstream of ring gear, for
Export low-speed rotation；At least primary planet reducing gear, it includes the planet wheel spindle for being used to assemble planetary gear；And at least
One centring means, the centring means is annular, and its relative to ring gear by radially medially and axial restraint set
Put, and one end with the planet wheel spindle is rollably radially contacted with always respectively, to carry out the radial direction of the planetary gear speed reducing mechanism
Positioning.
According to one embodiment of present invention, the input shaft can have input section, changeover portion and defeated vertically
Go out section, wherein input section receives high speed rotary motion；It can also include per one-level planetary gear speed reducing mechanism：Sun gear；Two or with
Upper planet wheel shaft, it has the length axially extended, and has Upstream section, middle reaches section and tract vertically；Two or with
Upper planet wheel, it coordinates in the middle reaches section of planet wheel spindle and engaged simultaneously with sun gear and internal tooth；And planet carrier, it is along axle
To with close end, pars intermedia and distal portion, and its close end is fastened to the tract of planet wheel spindle；Wherein, the first order is felt relieved
Device is axially fixedly fitted to the changeover portion of input shaft, the second level and is assemblied in upper one with higher level's centring means axial restraint
The pars intermedia of the planet carrier of level；The sun wheel shaft of first order planetary gear speed reducing mechanism to the deferent segment for being regularly sleeved on input shaft,
The second level and distal portion from above sun wheel shaft to the planet carrier for being regularly sleeved on upper level；Afterbody planet carrier is connected to
Output shaft is integrally formed with output shaft；The Upstream section of described two or more planet wheel spindles is around centring means week
Set, and rollably radially contacted with the centring means to ground, to realize radial positioning.
According to another embodiment of the invention, the Upstream section of the planet wheel spindle and the outer surface of tract can be with
Including the first cambered surface for axially extending and the second plane axially extended, to cause the transversal of the Upstream section and tract
Face is in " D " shape；And the circular in cross-section of the middle reaches section of planet wheel spindle, to form the Upstream section relative to planet wheel spindle with
Swim the radially enlarged portion of section, and middle reaches section thickness vertically be equal to or more than it is larger in the thickness of sun gear and planetary gear
The radius of curvature of first cambered surface of thickness, Upstream section and tract is equal to the radius of middle reaches section.
According to another embodiment of the invention, the second level and the first footpath can be included respectively with higher level's centring means
To positioning bearing, it is assemblied in the pars intermedia of the planet carrier of upper level the inner ring axial restraint of the first radial positioning bearing,
And the second level and the outer ring that the positioning bearing is abutted with the second planar radial of the Upstream section of higher level's planet wheel spindle, so that many
The Upstream section of individual planet wheel spindle closely surrounds the first radial positioning bearing, with radially position the second level and more than
Level planetary gear speed reducing mechanism.
According to another embodiment of the invention, the first order centring means can include：Second radial positioning
Bearing, is assemblied in the changeover portion of input shaft the inner ring axial restraint of the second radial positioning bearing；And positioning ring, its
The outer ring of inwall and the second radial positioning bearing is interference fitted, and circumferentially arranged has multiple fastening thread holes, and its court
The surface of output shaft is provided with circular depressions.
According to another embodiment of the invention, the Upstream section of any one in first order planet wheel spindle with it is described
The side wall of circular depressions can be radially contacted with rollably, to realize the radial positioning of the first order planetary gear speed reducing mechanism.
According to another embodiment of the invention, the Upstream section of any one in first order planet wheel spindle is set with
Rolling bearing, the outer wall of the outer ring of the rolling bearing can rollably be radially contacted with the side wall of the circular depressions, with footpath
To the positioning first order planetary gear speed reducing mechanism, and rolling bearing axis upwards can be against the bottom of the circular depressions.
According to another embodiment of the invention, the upstream end of the ring gear can along the circumferential direction be provided with
The corresponding mate with threaded holes of the fastening thread hole, so that by being screwed into screw that the ring gear and the positioning ring is tight
Gu together.
According to another embodiment of the invention, the radial direction of the middle reaches section of the planet wheel spindle of the second level and the above
Two axial ends of expansion section can bear against the outer ring of corresponding radial positioning bearing and the near-end of corresponding planet carrier
Portion, to realize the second level and the axially position with higher level's planetary gear speed reducing mechanism.
According to another embodiment of the invention, the radially enlarged portion of the middle reaches section of the first order planet wheel spindle
Two axial ends can abut the close end of the rolling bearing and first order planet carrier respectively, to realize the first order row
The axially position of star reducing gear.
According to another embodiment of the invention, the diameter of the input section of the input shaft, changeover portion and deferent segment
It can be sequentially reduced；And the diameter of the close end of the planet carrier, pars intermedia and distal portion is sequentially reduced.
According to another embodiment of the invention, the first and second radial positionings bearing can be deep-groove ball axle
Hold.
According to another embodiment of the invention, it can match somebody with somebody between the downstream of the output shaft and the ring gear
Conjunction has bearing, by the output shaft axial restraint and be rotatably connected to ring gear.
Brief description of the drawings
Fig. 1 a show the decomposition side view of the planetary reduction gear according to the present invention；
Fig. 1 b show the exploded perspective view of the planetary reduction gear according to the present invention；
Fig. 2 shows the assembling stereogram of the planetary reduction gear according to the present invention, and wherein ring gear and positioning ring is saved
Part slightly to be preferably shown at its inside；
Fig. 3 shows the portion of other in addition to ring gear of the planetary reduction gear according to the present invention from defeated tactile axle side
The exploded perspective view of part；And
Fig. 4 A and 4B respectively illustrate the second level of the planetary reduction gear according to the present invention and the planetary reducer with higher level
The end-view and partial sectional view of structure.
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.In explanation
In book, same or analogous drawing reference numeral indicates same or analogous part.It is following referring to the drawings to embodiment of the present invention
Illustrate to be intended to explain the present general inventive concept of the present invention, and be not construed as a kind of limitation to the present invention.
In addition, in the following detailed description, for ease of explaining, elaborating many concrete details to provide to present disclosure
The comprehensive understanding of embodiment.It should be apparent, however, that one or more embodiments can also in the case of these no details
It is carried out.In other cases, known construction and device diagrammatically embodies to simplify accompanying drawing.
According to an aspect of the present invention, the present invention provides a kind of planetary reducer, and the planetary reducer has pair
Its internal planetary gear speed reducing mechanism carries out the function of radial and axial positioning relative to ring gear.
Specifically, according in one exemplary embodiment of the present invention, with reference to exploded view as seen in figure la and lb, it is somebody's turn to do
Planetary reducer 100 includes：Ring gear 1, it has the upstream end 1a and downstream 1b set along its axis A-A, and parallel
The internal tooth 11 extended in axis；The internal tooth 11 substantially spreads all over the whole inwall of ring gear；Input shaft 2, it is along internal tooth coil axis
A-A radially medially and axial restraint and be rotatably connected to the upstream end 1a of ring gear 1, rotated at a high speed for receiving
Motion；Output shaft 3, its along ring gear axis A-A radially medially and axial restraint and be rotatably connected to ring gear
Downstream 1b, for output low-speed rotation, wherein " axial restraint " that is mentioned above means input shaft 2 and output shaft
3 are fixed to ring gear 1, so that it is irremovable to be axially relative to ring gear 1, so as to subtract for planet described below
The axially position of fast mechanism provides location base；At least primary planet reducing gear 4, it includes being used to assemble planetary gear 41
Planet wheel spindle 42；And at least one centring means 5, the centring means 5 is annular, and the centring means 5 is relative to internal tooth
Circle 1 by radially medially and axial restraint set, and one end with the planet wheel spindle 42 is rollably radially contacted with respectively, with
Carry out the radial positioning of the planetary gear speed reducing mechanism 4.It is described herein to " rollably radially contacting with " mean planet wheel spindle 42
Outer radial periphery face rollably contacted with the radial circumference face of centring means 5 so that between them be not present friction, relative to
It can roll each other.Further, since centring means 5 is placed in the middle by radial direction relative to ring gear, therefore relative to ring gear footpath
It is not floatable upwards, and the outer radial periphery face due to planet wheel spindle 42 and the radial circumference face of centring means 5 are protected always
Hold to radially contact with, therefore, it is possible to the miscellaneous part that ensures planet wheel spindle 42 and be connected with planet wheel spindle 42 diametrically position
It is fixed, that is, is radially oriented.
Specifically, according in one exemplary embodiment of the present invention, such as Fig. 1 a and 1b and 3 and Fig. 4 A and 4B
Shown, the input shaft 2 has input section 2a, changeover portion 2b and deferent segment 2c vertically, and wherein input section 2a, which is received, to be revolved at a high speed
Transhipment is dynamic.Also include per one-level planetary gear speed reducing mechanism 4：Sun gear 43；Two or more planet wheel spindles 42, it has prolongs vertically
The length stretched, and there is Upstream section 421, middle reaches section 422 and tract 423 vertically；Two or more planetary gears 41, it coordinates
Engaged with sun gear 43 and internal tooth 11 in the middle reaches section 422 of planet wheel spindle 42 and simultaneously；And planet carrier 44, it has vertically
There are close end 441, pars intermedia 442 and distal portion 443, and its close end 441 is fastened to the tract 423 of planet wheel spindle 42.
In the embodiment, as shown in figure 3, the axial restraint of first order centring means 5 be assemblied in the changeover portion 2b of input shaft 2, the second level
And the pars intermedia 442 of the planet carrier 44 of upper level is assemblied in the axial restraint of higher level's centring means 5.First order planetary reducer
It is sleeved on the deferent segment 2c of input shaft 2 axial restraint of sun gear 43 of structure 4, the second level and the axial restraint of above sun gear 43
The distal portion 443 of the planet carrier 44 of upper level is sleeved on, first is passed through by the high speed rotary motion of such connection input shaft
Level sun gear 43 is passed to first order planetary gear 41, is then passed to the planet wheel spindle 42 being connected with planetary gear 41, then
The planet carrier 44 for the next stage being connected with the planet wheel spindle 42 is passed to, so that the rotation of the first order be driven to being decelerated
The second level.In addition, afterbody planet carrier 44 is connected to output shaft 3 or is integrally formed with output shaft 3, with this, input shaft 2
Rotary motion be passed to output shaft 3.Afterbody planet carrier can as output shaft 3 a part, so as to reduce them
Between connection member, and planet wheel spindle is directly installed on the flange flange of output shaft.Described two or more planetary gears
The Upstream section 421 of axle 42 is circumferentially set around the centring means 5, and is rollably radially contacted with the centring means 5, with
Realize radial positioning.With this, pass through the periphery of the Upstream section 421 and the radially fixed centring means 5 of planet wheel spindle 42
Radially contact with, can realize planet wheel spindle 42, the planetary gear 41 on planet wheel spindle 42 and with planet wheel spindle 42
The radial positioning for the planet carrier 44 that tract 423 is connected, it is achieved that the radial positioning of whole planetary gear speed reducing mechanism.
According to one embodiment of present invention, as shown in Figure 4 B, the Upstream section 421 of the planet wheel spindle 42 and downstream
Section 423 outer surface include first cambered surface 421a, the 423a axially extended and axially extend the second plane 421p,
423p, make it that the cross section of the Upstream section 421 and tract 423 is in " D " shape, as shown in Fig. 4 A end-view.Such as Fig. 4 B
It is shown, the circular in cross-section of the middle reaches section 422 of planet wheel spindle 42, to form the He of Upstream section 421 relative to planet wheel spindle 42
The radially enlarged portion 422 of tract 423, and the thickness vertically of middle reaches section 422 is equal to or more than sun gear 43 and planetary gear
The radius of curvature of first cambered surface of the larger thickness in 41 thickness, Upstream section and tract is equal to the radius of middle reaches section.At this
In embodiment, due to the presence of the radially enlarged portion 422, as shown in Figure 4 B, in the second level and with the reducing gear 4 of higher level,
The right side of the radially enlarged portion against orienting device 5 outer peripheral face, and left side abut planet carrier 44 close end 441,
To realize the second level and the axially position with higher level's planetary gear speed reducing mechanism 4.Further, since the thickness of middle reaches section 422 is slightly
More than the larger thickness in the thickness of sun gear 43 and planetary gear 41, therefore during rotation, it is ensured that planetary gear or sun gear
Will not frictionally it be contacted with centring means 5 and planet carrier 44.
According in one exemplary embodiment of the present invention, as shown in Figure 4 B, the second level and with 5 points of higher level's centring means
Not Bao Kuo the first radial positioning bearing 51, be assemblied in upper level the inner ring axial restraint of the first radial positioning bearing 51
Planet carrier 44 pars intermedia 442, and the second level and with the second plane 421p of the Upstream section 421 of higher level's planet wheel spindle 42 radially
Ground is abutted on the outer ring of the positioning bearing 51, so that the Upstream section 421 of multiple planet wheel spindles 42 closely surrounds described first
Radial positioning bearing 5, that is, multiple Upstream sections 421 around the first radial positioning bearing 51 outer ring axially arrange and with it is outer
Circle is closely contacted, so that multiple Upstream sections 421 can be rollably radially fixed relative to the inner ring of the first radial positioning bearing 51
How position, so as to radially position the second level and with higher level's planetary gear speed reducing mechanism 4, specifically realize radial positioning, below
In will be explained in.
According in one exemplary embodiment of the present invention, as shown in figure 3, the first order centring means 5 includes：The
Two radial positioning bearings 52, are assemblied in the changeover portion of input shaft 2 the inner ring axial restraint of the second radial positioning bearing 52
2b；And positioning ring 53, the outer ring of its inwall and the second radial positioning bearing 52 is interference fitted, and circumferentially arranged has
Multiple fastening thread hole 53h, and it is provided with circular depressions 53r towards the surface of output shaft 3, as shown in Figure 3.
According in one exemplary embodiment of the present invention, as shown in figure 3, appointing in first order planet wheel spindle 42
The side wall 53rs of the Upstream section 421 of one and the circular depressions 53r is rollably radially contacted with, to realize the first order planet
The radial positioning of reducing gear 4.
Specifically, according in one exemplary embodiment of the present invention, as shown in figure 3, first order planet wheel spindle 42
In the Upstream section 421 of any one be set with rolling bearing 54, as shown in Fig. 2 confined state, the rolling bearing 54
Outer ring and the side wall 53rs of the circular depressions 53r are rollably radially contacted with, with first order planetary reducer described in radial positioning
Structure 4, and rolling bearing 54 axially on can against the circular depressions 53r bottom 53rb.In addition, as seen in figure la and lb,
The upstream end 1a of the ring gear 1 is peripherally disposed mate with threaded holes 1h corresponding with the fastening thread hole 53h, from
And the ring gear 1 and the positioning ring 53 are tightened together by being screwed into screw.In this embodiment, due to internal tooth
The fastening by screw of circle 1 and positioning ring 53 and the interference of the outer ring of its inner ring and the second radial positioning bearing 52 are matched somebody with somebody
Close, the axially and radially position of the positioning ring 53 is all fixed, so input shaft 1 and planet wheel spindle 42 can be relative to these
Positioning ring 53 is rotated, and due to the mediation of rolling bearing 54, planet wheel spindle 42 is relative to positioning ring 53 by radially
Positioning, that is, diametrically can not arbitrarily it float.Further, since can be recessed against the circle on the axial direction of rolling bearing 54
Portion 53r bottom 53rb, so bottom of the planet wheel spindle 42 relative to circular depressions 53r being interference fitted with rolling bearing 54
53rb axial location farthest reaches circular depressions 53r bottom 53rb towards input side.In addition, the first order planet wheel spindle
Two axial ends of the radially enlarged portion of 42 middle reaches section 422 abut the rolling bearing 54 and first order planet carrier 44 respectively
Close end 441, to realize the axially position of the first order planetary gear speed reducing mechanism 4, how to realize axially position, hereinafter
It will be explained in.
In summary, as shown in figs. 3 and 4b, the Upstream section 421 of multiple first order planet wheel spindles 42 is (for example, three planets
Wheel shaft 42 is circumferentially arranged against circular depressions 53r side wall with 120 ° of interval) circumferentially interval is set at an angle
The side wall for abutting circular depressions 53r is set to, and circular depressions 53r is diametrically not floatable.In addition, multiple first order
The tract 423 of planet wheel spindle 42 is retained as to relatively move relative to each other by planet carrier 44, therefore Upstream section
421 position relative to each other is also fixed, therefore multiple planet wheel spindles 42 can only be along as an entirety or integratedly
Circular depressions 53r side wall is rolled, and thus defines the floating of planet wheel spindle 42 diametrically.Because first order planet wheel spindle 42
It can not diametrically float.Therefore, the planet carrier 44 being connected with first order planet wheel spindle 42 can not diametrically float, and enter
And the position with the close-fitting first radial positioning bearing 51 of first order planet carrier 44 diametrically be also it is changeless,
So that the second level planet wheel spindle 42 of integration along the outer ring of the first radial positioning bearing 51 due to that can only roll, therefore
Its radial position is also fixed.By that analogy, the radial position of the planetary reducer more than second level is also fixed.But
It should be appreciated by those skilled in the art due to the presence of manufacturing tolerance, all parts allow in the range of manufacturing tolerance
Diametrically float.
In summary, as shown in figs. 3 and 4b, due to the first order planet wheel spindle 42 middle reaches section 422 input side
Face is against the rolling bearing 54 of further contact positioning ring 53, and outlet side end face is against row first order planet carrier 42, and second
It is radially fixed that the input side end face of the middle reaches section 422 of the planet wheel spindle 42 of level is connected to first be fixed on first order planet carrier 44
On the bearing 51 of position, and outlet side end face is connected on second level planet carrier 42, by that analogy, afterbody planet wheel spindle 42 it is defeated
Go out side end face to be either directly or indirectly connected on output shaft 3.Because the axial location of positioning ring 53 is changeless, and
The axial location of output shaft 3 is also to immobilize, so while two end faces of the middle reaches section 422 of planet wheel spindle 42 with it is corresponding
Part against the axial location of all parts is changeless, therefore whole reducing gear can not be floated arbitrarily in the axial direction
It is dynamic, it is contemplated that making tolerance, it can be floated in certain margin of tolerance.
In a preferred embodiment according to the present invention, the input section 2a of the input shaft 2, changeover portion 2b and deferent segment 2c
Diameter be sequentially reduced；And the diameter of the close end 441 of the planet carrier 44, pars intermedia 442 and distal portion 443 subtracts successively
It is small, centring means and sun gear can preferably be set with this.
In a preferred embodiment according to the present invention, the first radial positioning bearing 51 and the second radial positioning bearing 52
It is deep groove ball bearing.The deep groove ball bearing can bear certain axial force, therefore be preferred.
In a preferred embodiment according to the present invention, coordinate between the downstream 1b of the output shaft 3 and the ring gear 1
Have bearing 32, by the output shaft axial restraint and be rotatably connected to ring gear 1.The inner ring and output shaft of the bearing 32
3 interference fits, outer ring is interference fitted with ring gear 1, so that ensure that output shaft 3 is fixed relative to the axial location of ring gear 1, and
It can be rotated relative to ring gear 1.
In a preferred embodiment according to the present invention, multistage planet reducing gear includes three-stage planetary speed reducer structure, each
Level planetary gear speed reducing mechanism includes three planet wheel spindles, three planetary gears, a sun gear.
It will be understood to those skilled in the art that embodiment described above is all exemplary, and this area
Technical staff can make improvements, the rushing in terms of not recurring structure or principle of the structure described in various embodiments
Independent assortment can be carried out in the case of prominent.
Although with reference to accompanying drawing, the present invention is described, and the embodiment disclosed in accompanying drawing is intended to preferred to the present invention
Embodiment is illustrative, and it is not intended that limiting a kind of of the present invention.
Although some embodiments of this present general inventive concept are shown and illustrated, those of ordinary skill in the art will manage
Solution, in the case of without departing substantially from the principle of this present general inventive concept and spirit, can make a change to these embodiments, of the invention
Scope is limited with claim and their equivalent.
It should be noted that word " comprising " is not excluded for other element or steps, word "a" or "an" is not excluded for multiple.Separately
Outside, the scope that any element label of claim should not be construed as limiting the invention.
Claims (13)
1. a kind of planetary reducer, including：
Ring gear, it has the upstream end and downstream set along its axis, and parallel to the internal tooth that axis extends；
Input shaft, its along internal tooth coil axis radially medially and axial restraint and be rotatably connected to the upstream of ring gear
End, for receiving high speed rotary motion；
Output shaft, its along internal tooth coil axis radially medially and axial restraint and be rotatably connected to the downstream of ring gear
End, for output low-speed rotation；
At least primary planet reducing gear, it includes the planet wheel spindle for being used to assemble planetary gear；And
At least one centring means, the centring means is annular, and it is medially and axial by radial direction relative to ring gear
It is fixedly disposed, and one end with the planet wheel spindle is rollably radially contacted with always respectively, to carry out the planetary reducer
The radial positioning of structure.
2. planetary reducer according to claim 1, wherein, the input shaft has input section, changeover portion vertically
And deferent segment, wherein input section receive high speed rotary motion；
Also include per one-level planetary gear speed reducing mechanism：
Sun gear；
Two or more planet wheel spindles, it has the length axially extended, and has Upstream section, middle reaches section and downstream vertically
Section；
Two or more planetary gears, it coordinates in the middle reaches section of planet wheel spindle and engaged simultaneously with sun gear and internal tooth；And
Planet carrier, it has close end, pars intermedia and distal portion vertically, and its close end is fastened to the downstream of planet wheel spindle
Section；
Wherein, it is assemblied in the changeover portion of input shaft, the second level and with higher level's centring means first order centring means axial restraint
It is assemblied in the pars intermedia of the planet carrier of upper level axial restraint；
The sun wheel shaft of first order planetary gear speed reducing mechanism is to the deferent segment for being regularly sleeved on input shaft, the second level and the above sun
Distal portion from wheel shaft to the planet carrier for being regularly sleeved on upper level；
Afterbody planet carrier is connected to output shaft or is integrally formed with output shaft；
The Upstream section of described two or more planet wheel spindles is circumferentially set around the centring means, and with the centring means
Rollably radially contact with, to realize radial positioning.
3. planetary reducer according to claim 2, wherein,
The Upstream section of the planet wheel spindle and the outer surface of tract include the first cambered surface axially extended and axially extended
The second plane, with cause the Upstream section and tract cross section be in " D " shape；And
The circular in cross-section of the middle reaches section of planet wheel spindle, to form the radial direction of Upstream section and tract relative to planet wheel spindle
Expansion section, and the thickness vertically of middle reaches section is equal to or more than larger thickness in the thickness of sun gear and planetary gear, upstream
The radius of curvature of section and the first cambered surface of tract is equal to the radius of middle reaches section.
4. planetary reducer according to claim 3, wherein, the second level and include first respectively with higher level's centring means
Radial positioning bearing, is assemblied in the centre of the planet carrier of upper level the inner ring axial restraint of the first radial positioning bearing
Portion, and the second level and the outer ring that the positioning bearing is abutted with the second planar radial of the Upstream section of higher level's planet wheel spindle, from
And the Upstream section of multiple planet wheel spindles closely surrounds the first radial positioning bearing, with radially position the second level and
With higher level's planetary gear speed reducing mechanism.
5. planetary reducer according to claim 3, wherein, the first order centring means includes：
Second radial positioning bearing, is assemblied in the transition of input shaft the inner ring axial restraint of the second radial positioning bearing
Section；And
Positioning ring, the outer ring of its inwall and the second radial positioning bearing is interference fitted, and circumferentially arranged has multiple tight
Gu screwed hole, and it is provided with circular depressions towards the surface of output shaft.
6. planetary reducer according to claim 5, wherein, the Upstream section of any one in first order planet wheel spindle
Rollably radially contacted with the side wall of the circular depressions, to realize the radial positioning of the first order planetary gear speed reducing mechanism.
7. planetary reducer according to claim 6, wherein, the Upstream section of any one in first order planet wheel spindle
Rolling bearing is set with, the outer wall of the outer ring of the rolling bearing and the side wall of the circular depressions are rollably radially contacted with, with
First order planetary gear speed reducing mechanism described in radial positioning, and rolling bearing axis upwards can be against the bottom of the circular depressions.
8. planetary reducer according to claim 5, wherein, the upstream end of the ring gear is peripherally disposed to be had
Mate with threaded holes corresponding with the fastening thread hole, so that by being screwed into screw and by the ring gear and the positioning ring
Tighten together.
9. planetary reducer according to claim 3, wherein, the middle reaches section of the planet wheel spindle of the second level and the above
Radially enlarged portion two axial ends bear against corresponding radial positioning bearing outer ring and corresponding planet carrier it is near
End, to realize the second level and the axially position with higher level's planetary gear speed reducing mechanism.
10. planetary reducer according to claim 7, wherein, the radial direction of the middle reaches section of the first order planet wheel spindle
Two axial ends of expansion section abut the close end of the rolling bearing and first order planet carrier respectively, to realize described first
The axially position of level planetary gear speed reducing mechanism.
11. planetary reducer according to claim 1, wherein, input section, changeover portion and the deferent segment of the input shaft
Diameter be sequentially reduced；And
The diameter of the close end of the planet carrier, pars intermedia and distal portion is sequentially reduced.
12. the planetary reducer according to claim 4 or 5, wherein, the first and second radial positionings bearing is deep
Ditch ball bearing.
13. planetary reducer according to claim 1, wherein, the downstream of the output shaft and the ring gear it
Between be combined with bearing, by the output shaft axial restraint and be rotatably connected to ring gear.
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| CN201710342438.1A CN106989143B (en) | 2017-05-16 | 2017-05-16 | Planetary reduction gear |
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| CN201710342438.1A CN106989143B (en) | 2017-05-16 | 2017-05-16 | Planetary reduction gear |
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| CN106989143B CN106989143B (en) | 2024-05-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110945268A (en) * | 2017-08-04 | 2020-03-31 | 舍弗勒技术股份两合公司 | Planetary gear transmission device |
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| CN203594772U (en) * | 2013-12-12 | 2014-05-14 | 江苏真绩机械制造有限公司 | Locating mechanism for first-gear planet carrier of loading machine gearbox |
| CN205678068U (en) * | 2016-06-13 | 2016-11-09 | 广东精铟海洋工程股份有限公司 | A kind of anti-leaping planetary reduction gear |
| CN207080558U (en) * | 2017-05-16 | 2018-03-09 | 北京一维弦科技有限责任公司 | Planetary reducer |
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| US5295925A (en) * | 1991-11-22 | 1994-03-22 | Harmonic Drive Systems, Inc. | Planetary gear transmission |
| CN101021245A (en) * | 2007-03-21 | 2007-08-22 | 重庆大学 | Coaxle contrarotating high-speed planetary gear transmission |
| CN203594772U (en) * | 2013-12-12 | 2014-05-14 | 江苏真绩机械制造有限公司 | Locating mechanism for first-gear planet carrier of loading machine gearbox |
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| CN110945268A (en) * | 2017-08-04 | 2020-03-31 | 舍弗勒技术股份两合公司 | Planetary gear transmission device |
| CN110945268B (en) * | 2017-08-04 | 2023-04-07 | 舍弗勒技术股份两合公司 | Planetary gear transmission device |
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| Publication number | Publication date |
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| CN106989143B (en) | 2024-05-28 |
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