CN102979859B - Eccentric oscillating-type speed reducer - Google Patents
Eccentric oscillating-type speed reducer Download PDFInfo
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- CN102979859B CN102979859B CN201210321999.0A CN201210321999A CN102979859B CN 102979859 B CN102979859 B CN 102979859B CN 201210321999 A CN201210321999 A CN 201210321999A CN 102979859 B CN102979859 B CN 102979859B
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- Prior art keywords
- retainer
- eccentric
- eccentric body
- limiting unit
- stopper
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
- F16C19/28—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with two or more rows of rollers
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/07—Fixing them on the shaft or housing with interposition of an element
- F16C35/073—Fixing them on the shaft or housing with interposition of an element between shaft and inner race ring
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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
- F16H57/022—Adjustment of gear shafts or bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
- General Details Of Gearings (AREA)
Abstract
The invention provides a kind of eccentric oscillating-type speed reducer, it just maintains the lubricity to eccentric body bearing higher without the need to increasing cost.Eccentric oscillating-type speed reducer of the present invention possesses the move axially the 1st of restriction the 1st ~ 3rd eccentric body bearing (31 ~ 33) the, 2nd stopper (limiting part) (61, 62), 1st, 2nd stopper (61, 62) have: limiting unit (61B, 62B), a part and the 1st for circumference, 3rd retainer (51, 53) axial end (51A, 53A) abutting limits the 1st, 3rd eccentric body bearing (31, 33) move axially, and, another part of circumference is not with the 1st, 3rd retainer (51, 53) axial end (51A, 53A) abut, and guide portion (61C, 62C), more formed by radial outside than the radial outside of this limiting unit (61B, 62B), and tilt to the opposition side of eccentric body bearing in the axial direction.
Description
Technical field
The present invention relates to a kind of eccentric oscillating-type speed reducer.
Background technique
Eccentric oscillating-type speed reducer is disclosed in patent documentation 1.
The internal gear of internal messing while this speed reducer possesses the external gear and the swing of this external gear swung by eccentric body.The number of teeth difference of the internal tooth of internal gear and the external tooth of external gear is set as " 1 ", is configured to when external gear during side oscillation, takes out the relative rotation of internal gear and the external gear produced according to this number of teeth difference in internal gear.
Eccentric body bearing is configured with between eccentric body and external gear.Eccentric body bearing is made up of needle rollers (rolling element) and the retainer that supports this needle rollers, and does not possess special Internal and external cycle.Therefore, the packing ring (limiting part) being disposed for limiting this eccentric body bearing to axis is connected to the axial end of retainer.
In order to play the effect moved axially of restriction eccentric body bearing, no matter eccentric body is in any eccentric state, and packing ring is close to the axial end of retainer all the time.Its result, the space existing for needle rollers becomes almost by the space of the periphery of the inner circumferential of external gear, eccentric body, retainer and washer sealing.Therefore, be difficult to supply lubricant oil, so, the problem of easy deterioration of lubricant oil that there is needle rollers periphery and so on.
In patent documentation 1, proposing there is following structure for this problem, namely in order to almost be supplied lubricant oil by the space sealed to this more swimmingly, forming multiple penetration hole run through to axis at packing ring.
Patent documentation 1: Japanese Unexamined Patent Publication 2010-230171 publication ([0023], [0035] paragraph, [Fig. 6], [Fig. 7])
But there is the problem of generation expense and so on when forming penetration hole in structure disclosed in this patent documentation 1.That is, due to packing ring and retainer be close to while slide, therefore, if around penetration hole residual " burr " etc., then what is called " stuck phenomenon " occurs, has the anxiety causing retainer impaired.In order to avoid the problems referred to above, not only needing the penetration hole forming packing ring, also needing some the processing process attaching " burr " that carry out for removing surrounding.Therefore, there is the problem of generation expense and so in result.
Summary of the invention
The present invention completes to solve above-mentioned problem, and its problem is to provide a kind of eccentric oscillating-type speed reducer that just can maintain the lubricity to eccentric body bearing without the need to increasing cost higher.
The present invention solves above-mentioned problem by being set to following structure: a kind of eccentric oscillating-type speed reducer, the internal gear of internal messing while it possesses the external gear and the swing of this external gear swung by eccentric body, this eccentric oscillating-type speed reducer possesses: eccentric body bearing, be configured between described eccentric body and described external gear, and there is rolling element and support the retainer of this rolling element; And limiting part, limit moving axially of this eccentric body bearing, described limiting part has: limiting unit, and a part for circumference abuts with the axial end of described retainer and limits moving axially of described eccentric body bearing, further, another part of circumference does not abut with the axial end of this retainer; And guide portion, be formed in and more lean on radial outside than the radial outside of this limiting unit, and tilt to the opposition side of axial eccentric body bearing.
In the present invention, a part for the circumference of the limiting unit of limiting part abuts with the axial end of retainer and limits moving axially of eccentric body bearing, but another part of circumference does not abut with the axial end of this retainer.Therefore, the part this do not abutted utilizes as allowing the passage of lubricant oil turnover.
On the other hand, in the present invention, possesses the guide portion that the opposition side to axial eccentric body bearing tilts in the outside of described limiting unit.Therefore, what is called " stuck phenomenon " utilizes the function of this guide portion, even if the contact of limiting unit and retainer, non-contacting border, with the eccentric change of form of eccentric body, also can not occur.Therefore, without the need to carrying out the work of removing " burr " in addition, limiting part can be manufactured with low cost.
Invention effect
Lubricity to eccentric body bearing just can be maintained higher without the need to increasing cost according to the present invention.
Accompanying drawing explanation
Fig. 1 is the global sections figure of the eccentric oscillating-type speed reducer involved by an example of embodiments of the present invention.
Fig. 2 is the main portion sectional view of the speed reducer of Fig. 1.
Fig. 3 is the amplification sectional view of the structure near the limiting part of the speed reducer representing Fig. 1.
Fig. 4 is the explanatory drawing observing the limiting part of the speed reducer of Fig. 1 and the contact condition of retainer from limiting part side.
Fig. 5 is the explanatory drawing observing the limiting part of the speed reducer of Fig. 1 and the contact condition of retainer from retainer side.
Fig. 6 is the main portion sectional view of the eccentric oscillating-type speed reducer involved by an example of another embodiment of the present invention.
Fig. 7 is the explanatory drawing observing the limiting part of the speed reducer of Fig. 6 and the contact condition of retainer from limiting part side.
Fig. 8 is the explanatory drawing observing the limiting part of the speed reducer of Fig. 6 and the contact condition of retainer from retainer side.
In figure: 11, 12, 13-the 1st eccentric body ~ the 3rd eccentric body, 16-input shaft, 21, 22, 23-the 1st external gear ~ the 3rd external gear, 24-internal gear, 31, 32, 33-the 1st eccentric body bearing ~ the 3rd eccentric body bearing, 41, 42, 43-the 1st roller ~ the 3rd roller, 51, 52, 53-the 1st retainer ~ the 3rd retainer, 61, 62-the 1st stopper, 2nd stopper (limiting part), 61A, 62A-is by clamping part, 61B, 62B-limiting unit, 61C, 62C-guide portion, 61D, 62D-extends guide portion, 71, 72-the 1st takes turns support body, 2nd takes turns support body, 81, 82-the 1st ball bearing, 2nd ball bearing.
Embodiment
Below, with reference to the accompanying drawings an example of embodiments of the present invention is described in detail.
Fig. 1 is the global sections figure of the eccentric oscillating-type speed reducer involved by an example of embodiments of the present invention, and Fig. 2 is its main portion sectional view, and Fig. 3 is the amplification sectional view of the structure represented near stopper (limiting part).
The internal gear 24 of internal messing while this eccentric oscillating-type speed reducer G1 possesses the 1st external gear the 21 ~ 3rd external gear 23 and the swing of the 1st external gear the 21 ~ 3rd external gear 23 swung by the 1st eccentric body the 11 ~ 3rd eccentric body 13.
Below, be described from the Sketch of speed reducer G1.
The input shaft 16 of Primary Reference Fig. 1, speed reducer G1 is linked by spline 18 and not shown motor.Input shaft 16 is formed with 3 the 1st eccentric body the 11 ~ 3rd eccentric bodies 13.That is, input shaft 16 plays a role as the centre-crank formula " eccentric shaft " of the Og position, axle center being configured in internal gear 24.
Periphery 11A ~ the 13A of the 1st eccentric body the 11 ~ 3rd eccentric body 13 is eccentric relative to the axle center (identical with Og) of input shaft 16.The eccentric phase of the 1st eccentric body the 11 ~ 3rd eccentric body 13 staggers 120 degree respectively.
Therefore, from " sectional view " viewpoint, the eccentric phase of the 1st eccentric body the 11 ~ 3rd eccentric body 13 can not become the form as described in Fig. 1 or Fig. 2 strictly.But, at this, in order to easy understand invention, conveniently depict as present respectively the 1st eccentric body 11 to the eccentric state of particular side (upside of Fig. 1, Fig. 2), the 3rd eccentric body 13 to state and the state of the 2nd eccentric body 12 in the middle of above-mentioned state of its opposition side bias.
The 1st eccentric body bearing the 31 ~ 3rd eccentric body bearing 33 is configured with respectively between 1st eccentric body the 11 ~ 3rd eccentric body 13 and the 1st external gear the 21 ~ 3rd external gear 23.
As shown in Figure 2, the 1st eccentric body bearing the 31 ~ 3rd eccentric body bearing 33 is made up of the 1st roller the 41 ~ 3rd roller (rolling element) 43 and the 1st retainer the 51 ~ 3rd retainer 53 that supports the 1st roller the 41 ~ 3rd roller 43 respectively.Namely the 1st eccentric body bearing the 31 ~ 3rd eccentric body bearing 33 does not possess special Internal and external cycle (the 1st eccentric body the 11 ~ 3rd eccentric body 13 plays the effect of inner ring, and the 1st external gear the 21 ~ 3rd external gear 23 plays the effect of outer ring).
In 1st retainer the 51 ~ 3rd retainer 53, its axial end 51A ~ 53A from during end on observation in the form of a ring, its inner circumferential 51B ~ 53B and periphery 51C ~ 53C is circle.In addition, in this mode of execution, the internal diameter of the inner circumferential 51B ~ 53B of the 1st retainer the 51 ~ 3rd retainer 53 is all set as D1, and the external diameter of periphery 51C ~ 53C is all set as d1.
The mobile restriction of the axis of the 1st eccentric body bearing the 31 ~ 3rd eccentric body bearing 33 carries out as follows, that is, by a pair the 1st stoppers 61, the 2nd stopper (limiting part) 62, the 1st eccentric body bearing the 31 ~ 3rd eccentric body bearing 33 be used as entirety and sandwich (the mutual position limitation of each eccentric body bearing 31 ~ 33 is undertaken by retainer 51 ~ 53 contacting with each other each other).Carry out aftermentioned to the 1st stopper 61, the 2nd stopper 62 and neighbouring structure thereof.
Return Fig. 1, described internal gear 24 is made up of with the internal gear main body 28 of the cotter way 28A with this interior alligator 26 of supporting the cylindric interior alligator 26 forming internal tooth.Internal gear main body 28 is integrated with 30 one-tenth, shell.In this mode of execution, shell 30 is fixed on outside fixed component (diagram slightly) by the not shown bolt being inserted through bolt hole 34.The interior number of teeth (quantity of interior alligator 26) of internal gear 24 is only a little more than the outer number of teeth (being only 1 in this example) of the 1st external gear the 21 ~ 3rd external gear 23.
On 1st external gear the 21 ~ 3rd external gear 23, on the equidistant position of axle center O1 ~ O3 of the 1st external gear the 21 ~ 3rd external gear 23, be formed with multiple 1st penetration hole 21A ~ the 3rd penetration hole 23A respectively in circumference.1st penetration hole 21A ~ the 3rd penetration hole 23A separating movable fit has coated slip to promote domestic 38 of body 36.
The axial both sides of the 1st external gear the 21 ~ 3rd external gear 23 are configured with the 1st and take turns support body 71, the 2nd and take turns support body 72.1st takes turns support body 71, the 2nd takes turns support body 72 and supports input shaft 16 by the 1st ball bearing 81, the 2nd ball bearing 82, and is supported on shell 30 by main bearing (angular contact ball bearing) 54,56.The inner ring 81A of the 1st ball bearing 81, the inner ring 82A of the 2nd ball bearing 82 are to be pressed into the after this illustrate the 1st stopper (limiting part) the 61, the 2nd stopper (limiting part) 62 state be clipped between end difference 16A, 16B in input shaft 16.The end difference 72A that the outer ring 81B of the 1st ball bearing 81, the outer ring 82B of the 2nd ball bearing 82 take turns support body 72 at the end difference 71A, the 2nd that the 1st takes turns support body 71 carries out position limitation.
Described domestic 38 and the 2nd take turns support body 72 one-tenth is integrated.2nd takes turns support body 72 takes turns support body 71 by domestic 38 and bolt 58 and the 1st and links.2nd takes turns support body 72 utilizes bolt hole 59 to link with the driven member of not shown object machinery.
At this, with reference to figure 2 and Fig. 3, the structure of the 1st stopper (limiting part) the 61, the 2nd stopper (limiting part) 62 of mobile restriction of the axis of carrying out the 1st eccentric body bearing the 31 ~ 3rd eccentric body bearing 33 is described.
Fig. 2 represent comprise the 1st stopper 61, the 2nd stopper 62 the 1st eccentric body bearing the 31 ~ 3rd eccentric body bearing 33 near, Fig. 3 represent Fig. 2 of the 1st stopper 61 to look III part near.
1st stopper 61 is configured between the end difference 16A of input shaft 16 and the 1st ball bearing 81, and the 1st retainer 51 limiting the 1st roller 41 of the 1st eccentric body bearing 31 is taken turns support body 71 side to the 1st and moved vertically.2nd stopper 62 is configured between the end difference 16B of input shaft 16 and the 2nd ball bearing 82, and the 3rd retainer 53 limiting the 3rd roller 43 of the 3rd eccentric body bearing 33 is taken turns support body 72 side to the 2nd and moved vertically.In addition, as above-mentioned, the 2nd eccentric body bearing 32 is located by making the 2nd retainer 52 of itself be clipped between the 1st retainer 51 of the 1st eccentric body bearing 31 and the 3rd retainer 53 of the 3rd eccentric body bearing 33.
Relative 1st assembling of eccentric body bearing the 31 ~ 3rd eccentric body bearing 33 symmetry the 1st stopper 61, the 2nd stopper 62, but be identical parts as parts.Therefore, for convenience's sake, in Fig. 3 to the symbol corresponding to the 2nd stopper 62 side in addition () arrange record.
1st stopper 61, the 2nd stopper 62 have by clamping part 61A, 62A, limiting unit 61B, 62B, guide portion 61C, 62C respectively and extend guide portion 61D, 62D from inside radial direction.
Being made up of ring plain respectively from during end on observation by clamping part 61A, 62A of 1st stopper 61, the 2nd stopper 62.If observe from each limiting unit 61B, 62B, be then respectively positioned at its radial direction inner side by clamping part 61A, 62A, and offset offset width Δ 1, Δ 2 respectively to the opposition side of eccentric body bearing in the axial direction relative to this limiting unit 61B, 62B.The inner ring 81A of the end difference 16A and the 1st ball bearing 81 that are transfused to axle 16 by clamping part 61A of the 1st stopper 61 clamps, thus abut and be positioned the sidepiece of the end difference 16A on input shaft 16, its result determines the position of the 1st stopper 61 relative to input shaft 16 itself.The inner ring 82A of the end difference 16B and the 2nd ball bearing 82 that are transfused to axle 16 by clamping part 62A of the 2nd stopper 62 clamps, thus abutting or be positioned at the sidepiece of the end difference 16B on input shaft 16, its result determines the position of the 2nd stopper 62 relative to input shaft 16 itself.
Limiting unit 61B, the 62B of the 1st stopper 61, the 2nd stopper 62 are formed in this by outside the radial direction of clamping part 61A, 62A continuously from by clamping part 61A, 62A respectively.Be made up of from limiting unit 61B each during end on observation, 62B ring plain, inner circumferential 61B1,62B1 and periphery 61B2,62B2 of this ring-type are circle.
The limiting unit 61B of the 1st stopper 61 abuts with the axial end 51A of the 1st retainer 51 of the 1st eccentric body bearing 31 with a part for its circumference (scope of the symbol B1 of Fig. 4: aftermentioned), and another part of circumference (scope of the symbol A1 of Fig. 4: aftermentioned) does not set the outside diameter d 2 of periphery 61B2 with the mode that the axial end 51A of the 1st retainer 51 abuts (the internal diameter D1 of the inner circumferential 51B of relative 1st retainer 51).
As aforementioned, the 2nd stopper 62 and the 1st stopper 61 use same parts.Namely, the limiting unit 62B of the 2nd stopper 62 abuts with the axial end 53A of a part for its circumference with the 3rd retainer 53 of the 3rd eccentric body bearing 33, and another part of circumference does not set the outside diameter d 3 of periphery 62B2 with the mode that the axial end 53A of the 3rd retainer 53 abuts (the internal diameter D1 of the inner circumferential 53B of relative 3rd retainer 53).
By the setting in this each footpath, between the axial end 51A of the 1st the retainer 51 and limiting unit 61B of the 1st stopper 61, between the axial end 53A of the 3rd the retainer 53 and limiting unit 62B of the 2nd stopper 62, produce maximum clearance S1, Δ S2 at radial direction respectively.Fig. 4 is utilized to be described in detail about after its effect.
Guide portion 61C, the 62C of the 1st stopper 61, the 2nd stopper 62 are more formed, in the axial direction to opposition side tilt angle alpha 1, the α 2 of eccentric body bearing by radial outside than the radial outside of limiting unit 61B, 62B respectively.Its result, on upper end 61C1,62C1 of guide portion 61C, 62C, the 1st retainer 51, the 3rd retainer 53 produce axial clearance δ 1, δ 2 between axial end 51A, 53A.
In addition, in this mode of execution, guide portion 61C, 62C more extend guide portion 61D, 62D by being formed with continuously at a right angle with input shaft 16 outside radial direction.The structure extending guide portion 61D, 62D is formed by guide portion 61C, the 62C of then this inclination, its result, 1st stopper 61, the 2nd stopper 62 become limiting unit 61B, 62B from by clamping part 61A, 62A and extend outstanding to the retainer side in the axial direction shape of guide portion 61D, 62D, this limiting unit 61B, 62B as the 1st stopper 61, the 2nd stopper 62 " reinforcing part " play a role.But, in the present invention, necessarily there is not this prolongation guide portion 61D, 62D.
Then, the effect of this eccentric oscillating-type speed reducer is described.
If input shaft 16 is rotated by the rotation of not shown motor, then the 1st eccentric body the 11 ~ 3rd eccentric body 13 rotates integrally, and swings while making the 1st external gear the 21 ~ 3rd external gear 23 mutually maintain 120 degree of phase angles by the 1st eccentric body bearing the 31 ~ 3rd eccentric body bearing 33.With this, 1st external gear the 21 ~ 3rd external gear 23 misplaces successively with the engaging position of internal gear 24, when the 1st eccentric body the 11 ~ 3rd eccentric body 13 often rotates one time, the 1st external gear the 21 ~ 3rd external gear 23 only rotates relative to internal gear 24 amount that (rotation) be equivalent to number of teeth difference " 1 " relatively.
This rotation composition is passed to the 1st by domestic 38 (and slide promote bodies 36) and takes turns support body 71, the 2nd and take turns support body 72, is passed to the not shown driven member utilizing bolt hole 59 to link further.Thus, this driven member rotates with the speed after being decelerated.
Wherein, the 1st eccentric body bearing the 31 ~ 3rd eccentric body bearing 33 is clamped by limiting unit 61B, the 62B of a pair the 1st stoppers 61, the 2nd stopper 62, limits moving axially relative to input shaft 16 thus.That is, being configured between the end difference 16A of input shaft 16 and the 1st ball bearing 81 by clamping part 61A of the 1st stopper 61, and the 1st retainer 51 limiting the 1st roller 41 of the 1st eccentric body bearing 31 is taken turns support body 71 side to the 1st and is moved vertically.2nd stopper 62 is configured between the end difference 16B of input shaft 16 and the 2nd ball bearing 82, and the 3rd retainer 53 of the 3rd roller 43 of restriction the 3rd eccentric body bearing 33 is taken turns support body 72 side to the 2nd and moved vertically.
But not the whole circumference of limiting unit 61B, 62B abuts with axial end 51A, 53A of the 1st retainer 51 or the 3rd retainer 53, but only have a part for circumference to abut, another part of circumference does not abut.
With reference to figure 4, Fig. 5, this effect is described in detail.
Fig. 4 be observe the 1st retainer 51 from the 1st stopper 61 side and the contact of limiting unit 61B of the 1st retainer 51 of the 1st eccentric body bearing 31 seen and the 1st stopper 61, the figure of contactless state.The part that the 1st retainer 51 contacts with the limiting unit 61B of the 1st stopper 61 is represented by shade H1.
Fig. 5 is for identical contact, contactless state, the figure seen from the 1st retainer 51 side observation the 1st stopper 61.The part that the limiting unit 61B of the 1st stopper 61 contacts with the 1st retainer 51 is represented by shade H2.In addition, although the diagram of omission, be also only there is eccentric phase to stagger for the 2nd stopper 62 side, identical action effect can be obtained.
The periphery 61B2 of the inner circumferential 51B of the 1st retainer 51 and the limiting unit 61B of the 1st stopper 61 is circle.And, the internal diameter D1 of the inner circumferential 51B of the 1st retainer 51 is set to the size of the outside diameter d 2 of the periphery of the limiting unit 61B of the 1st stopper 61: the part (the circumferential scope of symbol B1) of the circumference of limiting unit 61B abuts with described 1st retainer 51 at the minimum eccentric side (the periphery 11A of the 1st eccentric body 11 is near the side of the axle center Og of input shaft (eccentric shaft) 16) of the 1st eccentric body 11, and another part of the circumference of this limiting unit 61B (scope of symbol A1) does not abut with the 1st retainer 51 in the maximum eccentric side (the periphery 11A of the 1st eccentric body 11 is farthest away from the side of the axle center Og of input shaft (eccentric shaft) 16) of the 1st eccentric body 11.
Therefore, in 1st retainer 51, only have a part for the circumference of the minimum eccentric side of the 1st eccentric body 11 of the applying shade H1 of Fig. 4 (only having the circumferential scope represented by symbol B1 in Fig. 4) to contact with the 1st stopper 61, take turns the movement of support body 71 side at this restriction the 1st eccentric body bearing 31 in the axial direction to the 1st.On the other hand, in the maximum eccentric side of the 1st eccentric body 11, the periphery 61B2 of limiting unit 61B does not arrive the inner circumferential 51B to the 1st retainer 51, therefore, produce clearance delta S1 in maximum eccentric side (eccentric position of Fig. 3, the upside of Fig. 4), oiling agent can utilize this clearance delta S1 to pass in and out.
In other words, thought in the past, " limiting part moved axially of restriction eccentric body bearing is not only at the minimum eccentric side of eccentric body; also reliably must contact with retainer in maximum eccentric side ", but in present embodiment, again thoroughly examine this design, the distance change this point of eccentric body bearing from the axle center of eccentric shaft is utilized on the contrary in the raising of lubricity.
In addition, as shown in Fig. 2 Fig. 3, guide portion 61C, the 62C of the 1st stopper 61, the 2nd stopper 62 are more formed by radial outside than the radial outside of limiting unit 61B, 62B respectively, and in the axial direction to eccentric body bearing cant angle degree α 1, α 2.Its result, in upper end 61C1,62C1 of this guide portion 61C, 62C, and the axial end 51A of the 1st retainer 51, the 3rd retainer 53 axial end 53A between produce gap delta 1, δ 2 vertically.Therefore, when the axial end 51A of the 1st retainer 51, the axial end 53A of the 3rd retainer 51,53 transit to contact condition from the contactless state with limiting unit 61B, 62B, there is not what is called " stuck phenomenon ".Therefore when manufacture the 1st stopper 61, the 2nd stopper 62 without the need to carrying out other processing etc. that stuck phenomenon prevents, thus can with low cost manufacture.
In addition, when the 1st retainer 51, the 3rd retainer 53 reciprocate to radial direction is relative with limiting unit 61B, 62B, the inclination of this guide portion 61C, 62C plays a role as " guiding of oiling agent " making oiling agent pass in and out more swimmingly.
In addition, in present embodiment, be formed outside the radial direction of guide portion 61C, 62C and extend guide portion 61D, 62D.Therefore, result limiting unit 61B, 62B in from by clamping part 61A, 62A and extend guide portion 61D, 62D to axially outstanding shape, this limiting unit 61B, 62B as the 1st stopper 61, the 2nd stopper 62 " reinforcing part " play a role.Therefore, the intensity of the 1st stopper 61, the 2nd stopper 62 entirety is higher, stably can carry out the mobile restriction of the 1st eccentric body bearing the 31 ~ 3rd eccentric body bearing 33.
In addition, due to by clamping part 61A, 62A is relative to limiting unit 61B, 62B offsets to the opposition side of eccentric body bearing in the axial direction, and, by clamping part 61A, opposite sides and the prolongation guide portion 61D of the eccentric body bearing of 62A, the opposite sides of the eccentric body bearing of 62D is compared and is more offset to the opposition side of eccentric body bearing in the axial direction, even if therefore guide portion 61C, 62C or prolongation guide portion 61D, the relative limiting unit 61B of 62D, 62B is formed to the skew of the opposition side of eccentric body bearing in the axial direction, also this guide portion 61C can reliably be prevented, 62C or prolongation guide portion 61D, 62D and the 1st ball bearing 81, the outer ring of the 2nd ball bearing 82 is interfered.
Like this, according to the present embodiment, maintain the lubricity to the 1st eccentric body bearing the 31 ~ 3rd eccentric body bearing 33 higher, the 1st stopper 61 moved axially, the 2nd stopper 62 of restriction the 1st eccentric body bearing the 31 ~ 3rd eccentric body bearing 33 can be used in simultaneously with low cost manufacture.
In addition, in above-mentioned mode of execution, be configured to limiting unit 61B, the part of circumference of 62B abuts with the 1st retainer 51, the 3rd retainer 53 at the minimum eccentric side of the 1st eccentric body 11, the 3rd eccentric body 13, and another part of the circumference of this limiting unit 61B, 62B does not abut with the 1st retainer 51, the 3rd retainer 53 in the maximum eccentric side of the 1st eccentric body 11, the 3rd eccentric body 13.
But, generally speaking, if the present invention becomes following structure, namely according to the movement of eccentric body, a part for the circumference of the limiting unit of stopper abuts with the axial end of retainer and limits moving axially of described eccentric body bearing, and another part of circumference does not abut with the axial end of this retainer, then can allow the part turnover that oiling agent does not abut from this, and can accomplish the end in view.
One example of the eccentric oscillating-type speed reducer shown in Fig. 6 ~ Fig. 8 involved by another embodiment of the present invention.
Fig. 6 is main portion sectional view, Fig. 7 be observe the 1st retainer 151 from the 1st stopper 161 side and the contact of limiting unit 161B of the 1st retainer 151 of the 1st eccentric body bearing 131 seen and the 1st stopper 161, the figure of contactless state.The part that the 1st retainer 151 contacts with the limiting unit 161B of the 1st stopper 161 is represented by shade H3.
Fig. 8 is for identical contact, contactless state, the figure seen from the 1st retainer 151 side observation the 1st stopper 161.The part that the limiting unit 161B of the 1st stopper 161 contacts with the 1st retainer 151 is represented by shade H4.In addition, although the diagram of omission, the 2nd stopper 162 side is also only that eccentric phase staggers, and obtains identical action effect.
In this speed reducer, the limiting unit 161B of the 1st stopper 161, the 2nd stopper 162, the periphery 161B2 of 162B can not depart from from the 1st eccentric body bearing 131 and the 1st retainer 151 of the 3rd eccentric body bearing 133, inner circumferential 151B, the 153B of the 3rd retainer 153.
But, on the inner circumferential 151B of the 1st retainer 151, the inner circumferential 153B of the 3rd retainer 153, form recess 151F, the 153F of multiple (in this example being 18) vertically in circumference.The shade H3 part of Fig. 7 represents the contact segment with the limiting unit 161B of the 1st stopper 161, and the shade H4 part of Fig. 8 represents the contact segment with the 1st retainer 151 of limiting unit 161B.In addition, the 1st retainer the 151 ~ 3rd retainer 153 is resin-made, and recess 151F ~ 153F is shaped when the 1st retainer the 151 ~ 3rd retainer 153 is shaped simultaneously.
In this mode of execution, a part for the circumference of the limiting unit 161B of the 1st stopper 161 abuts with the part beyond the recess 151F of the axial end 151A of the 1st retainer 151 and limits moving axially of the 1st eccentric body bearing 131.Further, another part of (corresponding with the recess 151F of the axial end 151A of the 1st retainer 151) circumference does not abut with the axial end 151A of the 1st retainer 151.
Therefore, in the maximum eccentric side of the 1st eccentric body 111, in the part P1 more exposed outside radial direction than the periphery 161B2 of limiting unit 161B in each recess 151F of the 1st retainer 151, the limiting unit 161B side of the 1st retainer 151 is communicated with the 1st roller 141 side.And, at the minimum eccentric side of the 1st eccentric body 111, in the part P2 that the inner circumferential 161B1 than limiting unit 161B in each recess 151F of the 1st retainer 151 more exposes inside radial direction, the limiting unit 161B side of the 1st retainer 151 is communicated with the 1st roller 141 side.
Thus, to be contacted with the axial end 151A of the 1st retainer 151 by the 1st stopper 161 (part beyond recess 151F) and limit moving axially of the 1st retainer 151, simultaneously, in the part P1 more exposed outside radial direction than the periphery 161B2 of limiting unit 161B in each recess 151F of the 1st the retainer 151 and part P2 that more exposes inside radial direction than the inner circumferential 161B1 of limiting unit 161B, oiling agent can be made to move between the limiting unit 161B side of the 1st retainer 151 and the 1st roller 141 side.
Structure involved by this mode of execution, as above mode of execution, in the gamut of circumference, can limit the movement of the 1st retainer 151 in any part of radial direction by the 1st stopper 161, therefore, it is possible to carry out more stable mobile restriction.The passed in and out scope of oiling agent can be adjusted by the size or shape changing the recess formed.1st retainer 151 is resin-made, and therefore recess 151F being formed by during mould-forming the 1st retainer 151 simultaneously, therefore can increase cost hardly.
2nd stopper 162 side also obtains identical action effect.About other structures, identical with above mode of execution, therefore, the symbol that after additional in the drawings to identical or functionally similar part, double figures is identical, and omit repeat specification.
In addition, in eccentric oscillating-type speed reducer G1, except central crank-type speed reducer G1 described above, such as, there will be a known the speed reducer being called the structure of distributing type (sortingtype), can the present invention be applied equally.
Common ground is the internal gear also possessing internal messing while the external gear that swung by eccentric body and this external gear are swung in the eccentric oscillating-type speed reducer of the type.But, 1 eccentric body by being configured in the shaft core position of internal gear in above mode of execution swings 1 external gear, but in the speed reducer of the type, the eccentric shaft of multiple (being generally about 3) is possessed, by simultaneously and swing 1 external gear to the eccentric body that equidirectional synchronous rotary is arranged at each eccentric shaft in the position offset from the axle center of external gear.In this eccentric oscillating-type speed reducer, eccentric body bearing is configured with between the eccentric body of each eccentric body bearing and external gear, to the mobile restriction of this rolling element (roller or needle roller) with the axis of the retainer of this rolling element of supporting, the stopper (limiting part) with the structure identical with above-mentioned mode of execution can be adopted.
In addition, in above-mentioned mode of execution, (for the ease of understanding invention) forms limiting part (the 1st, the 2nd stopper) by the profile of straight line shape, thus make the border clearing of each several part, but limiting part involved in the present invention forms profile without the need to certain straight line shape, as long as " existence " of limiting unit at least clearly involved in the present invention and guide portion, without the need to " border " in necessarily clearly each portion.
Further, as described, in the present invention, the prolongation guide portion arranged in the above-described embodiment is not necessarily needed.
And, about by clamping part, in the above-described embodiment, be set to by from limiting unit to axial dipole field, prevent from outer ring and the guide portion of the 1st, the 2nd ball bearing or extend guide portion interfering, but, such as by configuring pad between the inner ring 82A of the inner ring 81A of the 1st ball bearing 81, the 2nd ball bearing 82, or when eliminating described interference problem as additive methods such as the tapered roller bearings that the 1st, the 2nd bearing adopts inner ring and outer ring originally just to offset, offset from limiting unit by clamping part without the need to necessarily making.Namely, limiting part by clamping part mainly can the axial end of retainer of relative eccentric body bearing carry out the positioning instant of the limiting unit of limiting part can, such as, can be if direct dual-purpose is by the structure of clamping part inside the radial direction of limiting unit, extending at a right angle without the need to necessarily making itself and eccentric shaft.
Claims (5)
1. an eccentric oscillating-type speed reducer, while it possesses the external gear and the swing of this external gear swung by eccentric body, the internal gear of internal messing, is characterized in that,
This eccentric oscillating-type speed reducer possesses: eccentric body bearing, is configured between described eccentric body and described external gear, and has rolling element and support the retainer of this rolling element; And
Limiting part, limits moving axially of this eccentric body bearing,
Described limiting part has:
Limiting unit, a part for circumference abuts with the axial end of described retainer and limits moving axially of described eccentric body bearing, and another part of circumference does not abut with the axial end of this retainer; And
Guide portion, is formed in and more leans on radial outside than the radial outside of this limiting unit, and tilt to the opposition side of eccentric body bearing in the axial direction,
Between another part and described retainer of the circumference of described limiting unit, be provided with the gap that oiling agent can pass through.
2. eccentric oscillating-type speed reducer as claimed in claim 1, is characterized in that,
The periphery of the inner circumferential of described retainer and the limiting unit of described limiting part is circle, and
The external diameter of the periphery of the internal diameter of the inner circumferential of described retainer and the limiting unit of described limiting part is set to, a part for the circumference of described limiting unit abuts with described retainer at the minimum eccentric side of described eccentric body, and another part of the circumference of this limiting unit does not abut with described retainer in the maximum eccentric side of described eccentric body.
3. eccentric oscillating-type speed reducer as claimed in claim 1 or 2, is characterized in that,
In the inner circumferential of retainer, be formed with multiple recess in the circumferential.
4. eccentric oscillating-type speed reducer as claimed in claim 1 or 2, is characterized in that,
Opposition side in the axial direction to eccentric body bearing inside the radial direction of described limiting unit offsets.
5. eccentric oscillating-type speed reducer as claimed in claim 3, is characterized in that,
Opposition side in the axial direction to eccentric body bearing inside the radial direction of described limiting unit offsets.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011192136A JP5537516B2 (en) | 2011-09-02 | 2011-09-02 | Eccentric oscillation type speed reducer |
| JP2011-192136 | 2011-09-02 |
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| Publication Number | Publication Date |
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| CN102979859A CN102979859A (en) | 2013-03-20 |
| CN102979859B true CN102979859B (en) | 2015-12-02 |
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| CN201210321999.0A Active CN102979859B (en) | 2011-09-02 | 2012-09-03 | Eccentric oscillating-type speed reducer |
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| Country | Link |
|---|---|
| JP (1) | JP5537516B2 (en) |
| KR (1) | KR101369586B1 (en) |
| CN (1) | CN102979859B (en) |
| DE (1) | DE102012017335B4 (en) |
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| JP5941863B2 (en) * | 2013-03-27 | 2016-06-29 | 住友重機械工業株式会社 | Deceleration device having an eccentric oscillation type deceleration mechanism |
| JP6185829B2 (en) * | 2013-12-11 | 2017-08-23 | 住友重機械工業株式会社 | Manufacturing method of crankshaft and external gear of eccentric oscillating speed reducer |
| JP6219788B2 (en) * | 2014-07-15 | 2017-10-25 | 住友重機械工業株式会社 | Gear device |
| JP6422364B2 (en) * | 2015-02-17 | 2018-11-14 | 住友重機械工業株式会社 | Eccentric oscillation type speed reducer |
| CN109707820B (en) * | 2018-12-29 | 2021-04-13 | 枣庄北航机床创新研究院有限公司 | Lathe numerical control revolving stage oscillating tooth transmission that can clear up |
| JP2022135326A (en) | 2021-03-05 | 2022-09-15 | 住友重機械工業株式会社 | Eccentric oscillation speed reducer |
| CN113202853A (en) * | 2021-05-25 | 2021-08-03 | 钟永先 | Eccentric bearing with speed reduction function and speed reducer with same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886665A (en) * | 2009-05-13 | 2010-11-17 | 住友重机械工业株式会社 | Bearing structure and retainer of bearing |
| CN102032324A (en) * | 2010-08-18 | 2011-04-27 | 吴声震 | Three-sheet double-cycloid single stage decelerator of industrial robot |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05180278A (en) * | 1991-12-26 | 1993-07-20 | Sumitomo Heavy Ind Ltd | Internally meshing planetary gear structure |
| JP2002310162A (en) * | 2001-04-11 | 2002-10-23 | Ntn Corp | Roller device with holder and planetary gear drive using it |
| JP4265748B2 (en) | 2003-03-31 | 2009-05-20 | ナブテスコ株式会社 | Reducer using needle roller bearing |
| JP2006029393A (en) * | 2004-07-13 | 2006-02-02 | Nabtesco Corp | Bearing part structure |
| JP4746907B2 (en) | 2005-04-11 | 2011-08-10 | 住友重機械工業株式会社 | Planetary gear reducer |
| JP4975274B2 (en) | 2005-05-31 | 2012-07-11 | 住友重機械工業株式会社 | Power transmission device |
| JP2008261445A (en) * | 2007-04-13 | 2008-10-30 | Ntn Corp | In-wheel motor drive device |
| JP2009192045A (en) * | 2008-02-18 | 2009-08-27 | Ntn Corp | Wheel drive unit for railway vehicle |
| JP5156961B2 (en) * | 2008-10-24 | 2013-03-06 | 住友重機械工業株式会社 | Reduction gear |
| JP2011012699A (en) * | 2009-06-30 | 2011-01-20 | Nsk Ltd | Guide structure of retainer end face |
| JP5388746B2 (en) * | 2009-08-10 | 2014-01-15 | ナブテスコ株式会社 | Swing type reducer |
| JP5400648B2 (en) * | 2010-02-08 | 2014-01-29 | ナブテスコ株式会社 | Gear transmission |
| JP5554597B2 (en) | 2010-03-16 | 2014-07-23 | シャープ株式会社 | Character input device, character input method, and program including character input method |
| JP5068346B2 (en) * | 2010-07-05 | 2012-11-07 | ナブテスコ株式会社 | Bearing structure |
-
2011
- 2011-09-02 JP JP2011192136A patent/JP5537516B2/en active Active
-
2012
- 2012-08-29 KR KR1020120094598A patent/KR101369586B1/en active IP Right Grant
- 2012-08-31 DE DE102012017335.0A patent/DE102012017335B4/en active Active
- 2012-09-03 CN CN201210321999.0A patent/CN102979859B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886665A (en) * | 2009-05-13 | 2010-11-17 | 住友重机械工业株式会社 | Bearing structure and retainer of bearing |
| CN102032324A (en) * | 2010-08-18 | 2011-04-27 | 吴声震 | Three-sheet double-cycloid single stage decelerator of industrial robot |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101369586B1 (en) | 2014-03-04 |
| KR20130025820A (en) | 2013-03-12 |
| JP2013053665A (en) | 2013-03-21 |
| DE102012017335B4 (en) | 2020-10-01 |
| JP5537516B2 (en) | 2014-07-02 |
| DE102012017335A1 (en) | 2013-03-07 |
| CN102979859A (en) | 2013-03-20 |
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