CN106481740A - Eccentrically swinging gear device - Google Patents
Eccentrically swinging gear device Download PDFInfo
- Publication number
- CN106481740A CN106481740A CN201610451419.8A CN201610451419A CN106481740A CN 106481740 A CN106481740 A CN 106481740A CN 201610451419 A CN201610451419 A CN 201610451419A CN 106481740 A CN106481740 A CN 106481740A
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- China
- Prior art keywords
- eccentric body
- bent axle
- bearing
- axial direction
- eccentric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
- F16H2001/323—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear comprising eccentric crankshafts driving or driven by a gearing
Abstract
The present invention provides a kind of Eccentrically swinging gear device.According to the present invention, have in the Eccentrically swinging gear device of the eccentric body bearing with inner ring in eccentric body over-assemble, the ratio eccentric body of bent axle is more leaned on the external diameter of the end side in axial direction to ensure bigger.This Eccentrically swinging gear device possesses wobble gear, the bent axle with eccentric body and eccentric body bearing, wherein, eccentric body bearing has inner ring, and bent axle has to be arranged on and more leans on the large-diameter portion of end side in axial direction than eccentric body and be arranged on the minor diameter part between this large-diameter portion and eccentric body.The external diameter of large-diameter portion is more than from the axle center of bent axle the minimum eccentric distance to the periphery of eccentric body, and the external diameter of this large-diameter portion is less than the internal diameter of the inner ring of eccentric body bearing, the external diameter of minor diameter part is below minimum eccentric distance, and the width in the axial direction of this minor diameter part is more than the width in the axial direction of inner ring of eccentric body bearing.
Description
The application advocates the preference based on Japanese patent application the 2015-168361st filed in August in 2015 27 days.
The full content of this Japanese publication is by reference to being applied in this specification.
Technical field
The present invention relates to a kind of Eccentrically swinging gear device.
Background technology
There is a kind of Eccentrically swinging gear device disclosed in patent documentation 1.
This Eccentrically swinging gear device possess wobble gear, have make this wobble gear swing the bent axle of eccentric body and
Eccentric body bearing between eccentric body and wobble gear for the configuration.
Bent axle substantial middle in its axial direction has eccentric body.The square with the axis section of eccentric body is circle.In order to
Wobble gear is made to swing, eccentric body has the axle center eccentric with respect to the axle center of bent axle and has inclined with respect to the axle center of bent axle
The periphery of the heart.
In this geared system, eccentric body bearing has and outer be embedded in the inner ring of eccentric body, be embedded in the outer ring of wobble gear
And rolling element between inner ring and outer ring for the configuration.
Patent documentation 1：Japanese Unexamined Patent Publication 2013-142447 publication
In Eccentrically swinging gear device involved by patent documentation 1, the eccentric body Bearing configuration with inner ring is inclined
Between heart body and wobble gear.
When the eccentric body bearing with inner ring is assembled in eccentric body, need to make the axle center with eccentric body for the axle center of inner ring
Unanimously, and in this condition make the axial movement to eccentric body for this inner ring.In order to realize this movement, the ratio eccentric body of bent axle more leans on
The external diameter of the end side in axial direction is necessary for from below minimum range to eccentric body periphery for the axle center of bent axle.Therefore, difficult
Larger to ensure the external diameter of the end side of bent axle, for example it is difficult to also by bent axle on the basis of guaranteeing necessary intensity
The internal diameter of hollow bulb ensures larger.
Content of the invention
The present invention is to complete to solve the problems, such as this conventional, and its problem is, has tool in eccentric body over-assemble
Have in the Eccentrically swinging gear device of eccentric body bearing of inner ring, by the ratio eccentric body of bent axle more by the end side in axial direction
External diameter ensures bigger.
The present invention solves above-mentioned problem by following structure, i.e. a kind of Eccentrically swinging gear device, it possesses swing tooth
Take turns, there is the bent axle of eccentric body making the swing of this wobble gear and configure inclined between described eccentric body and described wobble gear
Heart body bearing, wherein, described eccentric body bearing has the outer inner ring being embedded in described eccentric body, and described bent axle has and is arranged on than institute
State eccentric body more to lean on the large-diameter portion of end side in axial direction and be arranged on minor diameter part between this large-diameter portion and described eccentric body, institute
The external diameter stating large-diameter portion is more than from the axle center of this bent axle minimum range to the periphery of described eccentric body, and this large-diameter portion
External diameter is less than the internal diameter of the inner ring of described eccentric body bearing, and the external diameter of described minor diameter part is from the axle center of this bent axle to described bias
Below minimum range till the periphery of body, and the width in the axial direction of this minor diameter part is more than the inner ring of described eccentric body bearing
Width in axial direction.
In addition, in this manual, " external diameter " and " internal diameter " these terms are not necessarily referring to " diameter ", but " radius is (from axle center
Distance to periphery) " concept.
In the present invention, the external diameter of the large-diameter portion of bent axle is less than the internal diameter of the inner ring of eccentric body bearing.Therefore, eccentric shaft
The inner ring holding can extend axially through the outside of large-diameter portion such that it is able to reach minor diameter part.In the axial direction of the minor diameter part of bent axle
Width is more than the width in the axial direction of inner ring of eccentric body bearing.And, the external diameter of minor diameter part is from the axle center of bent axle to bias
Below minimum range till the periphery of body.Therefore, whole eccentric body bearing can be completely in the axial direction to minor diameter part
In width, and in this minor diameter part, radially displaced by the axle center that makes the inner ring of eccentric body bearing, this eccentric shaft can be made
The axle center of the inner ring holding is consistent with the axle center of eccentric body.
Thus, even if the external diameter of large-diameter portion is more than from the axle center of bent axle the minimum range to the periphery of eccentric body,
The inner ring of eccentric body bearing can be assembled on eccentric body.
According to the present invention, there is the Eccentrically swinging gear device of the eccentric body bearing with inner ring in eccentric body over-assemble
In, the ratio eccentric body of bent axle more can be leaned on the external diameter of the end side in axial direction to ensure bigger.
Brief description
Fig. 1 is the section view of the structure of the Eccentrically swinging gear device involved by representing embodiments of the present invention
Figure.
Fig. 2 is the side view of the Eccentrically swinging gear device of Fig. 1.
Fig. 3 is the section view of the state of the bent axle over-assemble eccentric body bearing representing the Eccentrically swinging gear device in Fig. 1
Figure.
In figure：G- geared system, 11- the 1st external gear (wobble gear), 21- the 1st eccentric body, 30- bent axle, the big footpath of 30L-
Portion, 30S- minor diameter part, 36- is domestic, 41- the 1st eccentric body bearing, 41A- the 1st inner ring, 51- the 1st body flange, 71- the 1st Crankshaft
Hold, the external diameter of R30L- large-diameter portion, the external diameter of R30S- minor diameter part, R21-e21- minimum eccentric distance (minimum range), r41A- the
The internal diameter of the 1st inner ring of 1 eccentric body bearing, the width in the axial direction of the 1st inner ring of W41A- the 1st eccentric body bearing, W30S- is little
Width in the axial direction in footpath portion.
Specific embodiment
Hereinafter, describe one of embodiments of the present invention with reference to the accompanying drawings in detail.
Fig. 1 is the section view of the structure of the Eccentrically swinging gear device involved by representing embodiments of the present invention
Figure, Fig. 2 is its side view.In addition, Fig. 1 is equivalent to the sectional view along arrow I-I line of Fig. 2.
This Eccentrically swinging gear device G possesses：The external gear 10 (wobble gear) of axis swing, have and make this external gear
The bent axle 30 of the eccentric body 20 of 10 swings.Bent axle 30 constitutes the input shaft of this geared system G.To detailed after the structure of bent axle 30
State.
In Eccentrically swinging gear device G, possesses two external gears 10 (the 1st external gear side by side as wobble gear
11 and the 2nd external gear 12).By possessing two external gears 10, can be in the feelings of the size radially being not added with canine tooth wheel apparatus G
Increase transfer capacity under condition.Each external gear 10 is by two eccentric bodies 20 (the 1st eccentric body 21 and the 2nd being formed on bent axle 30
Eccentric body 22) and swung (axle center C11 and C12 is swung).In order that the pendulum of the 1st external gear 11 and the 2nd external gear 12
Move and be balanced, the 1st eccentric body 21 and the 2nd eccentric body 22 are eccentric with 180 ° of phase contrast each other.To the structure of eccentric body 20 with
After describe in detail.
It is configured with eccentric body bearing 40 (the 1st eccentric body bearing 41 and the 2nd eccentric body between eccentric body 20 and external gear 10
Bearing 42).Specifically, it is configured with the 1st eccentric body bearing 41 between the 1st eccentric body 21 and the 1st external gear 11.Inclined the 2nd
It is configured with the 2nd eccentric body bearing 42 between heart body 22 and the 2nd external gear 12.1st eccentric body bearing 41 and the 2nd eccentric body bearing 42
For mutually isostructural bearing.
1st eccentric body bearing 41 is made up of ball bearing, and described ball bearing has outer the 1st inner ring being embedded in the 1st eccentric body 21
41A, it is embedded in the 1st outer ring 41B of the 1st external gear 11 and is assembled in the 1st rolling between the 1st inner ring 41A and the 1st outer ring 41B
Body (ball) 41C.In this embodiment, the width in the axial direction of the 1st inner ring 41A of the 1st eccentric body bearing 41 is W41A.The
2 eccentric body bearings 42 also have and this identical structure.
Wobble gear (i.e. external gear 10) and non-wobble gear (i.e. internal gear 32) internal messing.The axle center C32 of internal gear 32
It is fixing (not swinging).Internal gear 32 has the internal tooth wheel body 32A integrated with shell 34, is axially formed in this internal tooth
The cotter way 32B of wheel body 32A and the cylinder being rotatably assembled in this cotter way 32B internal tooth that is interior and constituting this internal gear 32
Interior alligator 32C.The quantity (i.e. radical of interior alligator 32C) of the internal tooth of internal gear 32 compares the quantity of the external tooth of the 1st external gear 11 slightly
Many (in this example, only having more one).
Both sides in the axial direction of external gear 10 are configured with body flange 50 (the 1st body flange 51 and the 2nd body flange 52).Specifically
For, the side (in this example be and load contrary side) in the axial direction of external gear 10 is configured with the 1st body flange 51.?
Opposite side (being load-side in this example) in the axial direction of external gear 10 is configured with the 2nd body flange 52.Body flange 50 is via main shaft
Hold 60 (the 1st base bearing 61 and the 2nd base bearings 62) and be supported on shell 34 in the way of rotating freely.
In this embodiment, base bearing 60 is made up of the angular contact ball bearing of back-to-back assembling.1st base bearing 61 has
The inner ring 61A integrated with the 1st body flange 51, it is embedded in the special outer ring 61B of shell 34 and is assembled in inner ring 61A and outer ring
Rolling element (ball) 61C between 61B.2nd base bearing 62 also has and this identical structure.
The 1st external gear 11 and the 2nd external gear 12 from the position of its axle center C11, C12 skew run through have multiple domestic
36.Because domestic 36 run through external gear 10, therefore this domestic 36 action is synchronous with the rotation of this external gear 10.1st external gear
11 and the 2nd external gear 12 is formed with for the domestic 36 multiple 1st inner pinhole 11A and the 2nd inner pinhole 12A running through.
Domestic 36 are embedded in the 1st body flange 51 and the 2nd body flange 52.It is formed with embedded for domestic 36 in the 1st body flange 51
The 1st domestic retaining hole 51A.It is formed with 2nd domestic retaining hole 52A embedded for domestic 36 in the 2nd body flange 52.
More specifically, domestic 36 (configuration is in the side contrary with load) the 1st is embedded in gap fiting mode
1st domestic retaining hole 51A of body flange 51.Domestic 36 are not abutted (between guaranteeing to have with the bottom 51A1 of the 1st domestic retaining hole 51A
Gap δ 51A).On the other hand, domestic 36 (press-in) is embedded in (configuration is in load-side) the 2nd body flange 52 with interference fit
The 2nd domestic retaining hole 52A.Domestic 36 are abutted with the bottom 52A1 of the 2nd domestic retaining hole 52A.Domestic 36 by with this bottom
52A1 abuts and to realize the positioning in axial direction.
In addition, in the 1st body flange 51 and the 2nd body flange 52, with the 1st domestic retaining hole 51A and the 2nd domestic retaining hole
The coaxial mode of 52A extends through and is formed with the 1st through hole 51P and the 2nd through hole 52P.It is formed at the of the 1st body flange 51 side
1 through hole 51P is as the lubrication supplying lubricant via described gap delta 51A between the domestic 36 and the 1st domestic retaining hole 51A
Path and function.Thereby, it is possible to suppress gap cooperation the domestic 36 and the 1st domestic retaining hole 51A between produce micro- vibration
Damage.
On the other hand, be formed at the 2nd through hole 52P of the 2nd body flange 52 side as from domestic contrary side insertion
Fixture (not shown) come to tap the patchhole of this fixture when domestic 36 and function.Thereby, it is possible to easily from the 2nd
Domestic retaining hole 52A separation (decomposition) is embedded in the 2nd domestic retaining hole 52A of the 2nd body flange 52 with interference fit
Pin 36.
Object Part (driven member as driven member：Omit diagram) with the 2nd body flange 52 (with interference fit
Mode is embedded with the body flange of domestic 36 side) link.The symbol 52B of Fig. 1 represents the bolt hole for object of connection part.
The rotation composition being transferred to the external gear 10 of the 1st body flange 51 and the 2nd body flange 52 is transferred to object portion via the 2nd body flange 52
Part.
By this structure, the rigidity of geared system G can be maintained higher (can suppress to occur to loosen), and from
When object Part side is applied with radial load, it is prevented from excessive load and puts on domestic 36.
As described above, the combination of domestic 36 gap cooperation and interference fit is most preferably convex with load contrary side
Edge side is using gap cooperation by the way of the flange side of load-side adopts interference fit.But contrary side may also be employed
Formula.That is, on the flange side of the side contrary with load, using interference fit, the flange side in load-side is joined using gap
Close.
In addition, in this embodiment, the 1st body flange 51 and the 2nd body flange 52 are via domestic 36 links, and the 1st is convex
Edge body 51 is also linked via multiple wheel carrier pins 38 with the 2nd body flange 52.Wheel carrier pin 38 with domestic 36 identical circumference on and
Prominent and form as one with the 2nd flange part 52 from the 2nd body flange 52 between each domestic 36.Wheel carrier pin 38 passes through convex from the 1st
The wheel carrier bolt 39 that edge body 51 side is screwed into and the 1st body flange 51 link.Each wheel carrier pin 38 movable fit (leave and run through with gap)
In external gear 10.That is, even if external gear 10 swings, wheel carrier pin 38 is not also contacted with external gear 10.
And, in this embodiment, outside domestic 36, it is embedded with interior roller 74 as slip promoting member.One of interior roller 74
Divide and abut with the 1st inner pinhole 11A and the 2nd inner pinhole 12A of the 1st external gear 11 and the 2nd external gear 12.The external diameter of interior roller 74 is less than
The internal diameter of the 1st inner pinhole 11A and the 2nd inner pinhole 12A, between interior roller 74 and the 1st inner pinhole 11A and the 2nd inner pinhole 12A really
Possess that maximum is equivalent to the 1st eccentric amount e 21 of the 1st eccentric body 21 and the 2nd eccentric body 22 and the twice of the 2nd eccentric amount e 22 the 1st
Gap delta 21 and the 2nd gap delta 22.It is domestic with the 1st inner pinhole 11A and the 2nd that the swing composition of external gear 10 is secured at this interior roller 74
The 1st gap delta 21 between the 12A of hole and the 2nd gap delta 22 absorb.In addition, between the 1st external gear 11 and the 2nd external gear 12, folder
There is the insertion ring 15 for suppressing the 1st external gear 11 and the 2nd external gear 12 moves in the axial direction.
In addition, the side in the axial direction of shell 34 is linked with load reverse side cover 84.In load reverse side cover 84 and song
It is configured with oil sealing 86 between axle 30.And, it is configured with oil sealing 88 between shell 34 and the 2nd body flange 52, in the 2nd body flange 52
It is also configured with oil sealing 90 and bent axle 30 between.Symbol 92 represents o-ring.By this structure, in radially outer of bent axle 30
Side carries out sealingization to geared system G.It is sealed with lubricant in the inside of geared system G.
As described above, in terms of power transmission, the 1st eccentric body 21 side and the 2nd eccentric body 22 side have essentially identical knot
Structure.But, in the 1st eccentric body 21 side and the 2nd eccentric body 22 side, for assemble eccentric body bearing 40 (the 1st eccentric body bearing 41 or
2nd eccentric body bearing 42) structure different.
In the present embodiment it is desirable to the end side in the axial direction of the 1st eccentric body 21 of bent axle 30 is (contrary with loading
Side) form large-diameter portion 30L for forming aftermentioned screw 30T.Therefore, the present invention is applied to the 1st eccentric body in bent axle 30
The structure of 21 over-assemble the 1st eccentric body bearing 41.
On the other hand, the end side (load-side) in the axial direction of the 2nd eccentric body 22 of bent axle 30 not necessarily forms screw etc.,
Therefore do not need to form large-diameter portion.Therefore, the present invention is not suitable for the 2nd eccentric body 22 over-assemble the 2nd eccentric body in bent axle 30
The structure of bearing 42.
Therefore, below, mainly the structure of the 1st eccentric body 21 over-assemble the 1st eccentric body bearing 41 in bent axle 30 is carried out
Detailed description.
In conjunction with Fig. 3, bent axle 30 radially has the hollow bulb 30G coaxial with axle center C30 in central authorities at it.Hollow bulb 30G is along axle
Run through bent axle 30 to identical internal diameter r30G.Bent axle 30 has the 1st eccentric body in this bent axle 30 with loading contrary side
21st, it is arranged on and more depend on the large-diameter portion 30L of end side in axial direction than the 1st eccentric body 21 and be arranged on this large-diameter portion 30L and the 1st
Minor diameter part 30S between eccentric body 21.
First, the structure from the 1st eccentric body 21 of bent axle 30 proceeds by explanation.
Bent axle 30 is provided integrally with the 1st eccentric body 21 for making the 1st external gear 11 swing.The external diameter of the 1st eccentric body 21
R21 is consistent with the internal diameter r41A of the 1st inner ring 41A of the 1st eccentric body bearing 41.The axle center C21 of the 1st eccentric body 21 is with respect to bent axle
30 axle center C30 bias the 1st eccentric amount e 21.The shape in the square with the axis section of the 1st eccentric body 21 is the circle that external diameter is R21
Shape.That is, the periphery of the 1st eccentric body 21 is equivalent to the amount of the 1st eccentric amount e 21 with respect to the axle center C30 bias of bent axle 30.
More specifically, in the 1st eccentric body 21, the maximum eccentric portion of the 1st eccentric body 21 is (under in Fig. 1, Fig. 3 being
Side) place the periphery from axle center C30 to the 1st eccentric body 21 of bent axle 30 distance become maximum eccentric distance (R21+
e21).And, in the 1st eccentric body 21, the minimum eccentric part of the 1st eccentric body 21 (being upside in Fig. 1, Fig. 3) place from bent axle
Distance 30 periphery of axle center C30 to the 1st eccentric body 21 becomes minimum eccentric distance (R21-e21).
Width in the axial direction of the 1st eccentric body 21 is W21.It has been observed that the axle of the 1st inner ring 41A of the 1st eccentric body bearing 41
Width upwards is W41A.Width W21 in the axial direction of the 1st eccentric body 21 is more than the 1st inner ring 41A of the 1st eccentric body bearing 41
Axial direction on width W41A (W21 ＞ W41A).
Then, end side in the axial direction of the 1st eccentric body 21 of this bent axle 30 for the bent axle 30 (is axially in this embodiment
On end) there is large-diameter portion 30L.Large-diameter portion 30L is external diameter between the minor diameter part 30S and axial end 30E of bent axle 30
The best part.
The axle center C30L of large-diameter portion 30L is consistent with the axle center C30 of bent axle 30.It is inclined that the external diameter R30L of large-diameter portion 30L is more than the 1st
The minimum eccentric distance (R21-e21) (R30L ＞ (R21-e21)) to periphery of heart body 21.The external diameter of large-diameter portion 30L
R30L is less than the internal diameter r41A (R30L ＜ r41A) of the 1st inner ring 41A of the 1st eccentric body bearing 41.In the axial direction of large-diameter portion 30L
Width is W30L in the present example, can be set to arbitrary width (being not particularly limited).
In addition, in this embodiment, large-diameter portion 30L is arranged on " end " in the axial direction of bent axle 30.But the present invention
Large-diameter portion need not necessarily be arranged on the end in the axial direction of bent axle.For example, more leaning on the end side in axial direction than large-diameter portion
Can also there is the part that external diameter is less than this large-diameter portion.
And, large-diameter portion can also be arranged on " many places " of the end side in the axial direction of eccentric body.For example, in this embodiment party
In formula, it is formed with circlip groove 30D in large-diameter portion 30L.According to view, this Structure Understanding can be axle in the 1st eccentric body 21
End side upwards and be formed with large-diameter portion 30L, 30L2 at two of the both sides in the axial direction of this circlip groove 30D.Than path
When some of condition that the end side in axial direction is provided with the large-diameter portion meeting the present invention is more leaned in portion, the plurality of large-diameter portion is equal
Can as the large-diameter portion in the present invention function.
The internal diameter r30G of the hollow bulb 30G of bent axle 30 is constant, therefore in the large-diameter portion 30L that external diameter R30L is larger, can be true
Protect relatively thick wall thickness t30L (=R30L-r30G).In this embodiment, in the big footpath that the wall thickness t30L of this bent axle 30 is thick
Portion 30L, the end face 30E from axial direction has been axially formed screw 30T.Screw 30T is used for linking to input shaft (i.e. bent axle 30)
Transmission is from part (such as gear or belt wheel etc. of the power driving source：Omit diagram).
Bent axle 30 also has minor diameter part 30S between large-diameter portion 30L and the 1st eccentric body 21.
The minor diameter part 30S of bent axle 30 is the axle center C41 making the 1st eccentric body bearing 41 during assembling the 1st eccentric body bearing 41
The region of displacement.The external diameter R30S of minor diameter part 30S is less than the external diameter R30L (R30S ＜ R30L) of large-diameter portion 30L.Minor diameter part 30S's
Axle center C30S is consistent with the axle center C30 of bent axle 30.That is, the axle center C30 of bent axle 30, the axle center C30L of large-diameter portion 30L and minor diameter part
The axle center C30S of 30S is concentric.
The external diameter R30S of minor diameter part 30S is less than (can also be same as) minimum eccentric distance (i.e. from the axle center C30 of bent axle 30
Minimum range (R21-e21) to the periphery of the 1st eccentric body 21), R30S≤(R21-e21).The external diameter of minor diameter part 30S
R30S is less than the internal diameter r41A of the 1st inner ring 41A of the 1st eccentric body bearing 41.Width W30S in the axial direction of minor diameter part 30S is more than
Width W41A (W30S ＞ W41A) in the axial direction of the 1st inner ring 41A of the 1st eccentric body bearing 41.
In addition, in this Eccentrically swinging gear device G, it has been observed that the sidepiece in the axial direction of external gear 10 is configured with
1st body flange 51 and the 2nd body flange 52.The 1st body flange 51 and bent axle 30 in side in the axial direction of external gear 10 for the configuration
Between, be configured with for support bent axle 30 axial direction on side the 1st crankshaft bearing 71.
In this embodiment, the 1st crankshaft bearing 71 is made up of the roller 71C without special inner ring and outer ring.Bent
The minor diameter part 30S of axle 30 constitutes the rolling surface of the roller being somebody's turn to do (not having inner ring) the 1st crankshaft bearing 71.In addition, the symbol in Fig. 1
Number 71R represents the retainer of the 1st crankshaft bearing 71.
Bent axle 30 large-diameter portion 30L be biased against eccentric body 20 side in the axial direction, be formed with described circlip groove 30D.In gear
Ring recess 30D configures back-up ring 80.And, between the 1st eccentric body 21 and the 2nd eccentric body 22, it is formed with prominent circumferentially around a circle
Play portion 30P.It is configured with the 1st eccentric body bearing 41, the liner 81 of wall thickness, the 1st Crankshaft between this back-up ring 80 and jut 30P
Hold 71 retainer 71R and the thin liner 82 of wall.Hereby it is achieved that the 1st eccentric body bearing 41 and the 1st crankshaft bearing 71 are in the axial direction
Positioning.
In addition, in configuration between the 2nd body flange 52 and bent axle 30 of the opposite side in the axial direction of the 2nd external gear 12, joining
Be equipped with for support bent axle 30 axial direction on opposite side the 2nd crankshaft bearing 72.2nd crankshaft bearing 72 is by special inner ring
The ball bearing between 72A and outer ring 72B with rolling element (ball) 72C is constituted.
2nd crankshaft bearing 72 configures in bearing equipped section 30F, and this bearing equipped section 30F has than the 2nd eccentric body 22
Small eccentricity is from (minimum range from the periphery of axle center C30 to the 2nd eccentric body 22 of bent axle 30) little external diameter R30F.Cause
This, as described above, the 2nd eccentric body bearing 42 also can be assembled in bent axle 30 by (even if inapplicable present invention) without a hitch
On 2nd eccentric body 22.
Then, the effect to the Eccentrically swinging gear device G involved by present embodiment illustrates.
First, before the effect that explanation is related to the assembling of the 1st eccentric body bearing 41, this eccentric oscillating-type tooth is first described
The effect of the power-transmission system of wheel apparatus G.
In the large-diameter portion 30L of bent axle 30 (input shaft), it is linked with power transmission member (not shown) via screw 30T.If
By being rotated from the power driving source, then (the 1st is inclined for the eccentric body 20 forming as one with this bent axle 30 for bent axle 30
Heart body 21 and the 2nd eccentric body 22) rotation.If eccentric body 20 rotates, via eccentric body bearing 40 (the 1st eccentric body bearing 41 and
2nd eccentric body bearing 42) it is assembled in the external gear 10 (the 1st external gear 11 and the 2nd external gear 12) of periphery of this eccentric body 20
C11, C12 are swung in axle center.
External gear 10 and internal gear 32 internal messing.The number of teeth of the internal tooth of gear ratio internal gear 32 of the external tooth of external gear 10
(radical of interior alligator 32C) only lacks one.Thus, input shaft often rotates a circle, and the phase place of external gear 10 is with respect to internal gear 32
Offset suitable amount (1 tooth amount) poor with the number of teeth, thus carrying out rotation.This rotation composition is via the interior roller 74 running through external gear 10
It is transferred to domestic 36, so that domestic 36 are revolved round the sun around the axle center C32 (the axle center C30 of=bent axle 30) of internal gear 32.
By this domestic 36 revolution, support domestic 36 the 1st body flange 51 and the 2nd body flange 52 around internal gear 32 axle
Heart C32 is rotated (rotation).By the rotation of the 1st body flange 51 and the 2nd body flange 52, it is linked to the 2nd via bolt hole 52B
The object Part (driven member) of body flange 52 is driven.
Here, carrying out the assembling of the 1st eccentric body bearing 41 as follows.
Fig. 3 is to represent the sectional view that the 1st eccentric body bearing 41 is assembled in the state on bent axle 30.
In this Eccentrically swinging gear device G, the external diameter R30L of the large-diameter portion 30L of bent axle 30 is less than the 1st eccentric shaft
Hold the internal diameter r41A (r41A ＞ R30L) of 41 the 1st inner ring 41A.Therefore, the 1st inner ring 41A of the 1st eccentric body bearing 41 can be across
Cross large-diameter portion 30L and to minor diameter part 30S side shifting (P1 in Fig. 3).
Width W30S in the axial direction of minor diameter part 30S is more than in the axial direction of the 1st inner ring 41A of the 1st eccentric body bearing 41
Width W41A.Therefore, whole 1st eccentric body bearing 41 is completely in the width W30S in the axial direction to minor diameter part 30S.And
And, the external diameter R30S of minor diameter part 30S is less than the minimum bias from the periphery of axle center C30 to the 1st eccentric body 21 of bent axle 30
Distance (R21-e21).
Therefore, in this minor diameter part 30S, the axle center C41A of the 1st inner ring 41A that can make the 1st eccentric body bearing 41 is along footpath
It is moved to from the axle center C30 (the axle center C30S of the axle center C30L=minor diameter part 30S of=large-diameter portion 30L) of original bent axle 30
The axle center C21 (P2 in Fig. 3) of 1 eccentric body 21.That is, the 1st inner ring of the 1st eccentric body bearing 41 can in minor diameter part 30S, be made
The axle center C41A of 41A is consistent with the axle center C21 of the 1st eccentric body 21.
As a result, in this condition, by by the 1st eccentric body bearing 41 to the 1st eccentric body 21 side shifting, can by this
It is embedded in the 1st eccentric body 21 (P3 in Fig. 3) outside 1 eccentric body bearing 41.That is, even if the external diameter R30L of large-diameter portion 30L is more than from song
Minimum eccentric distance (R21-e21) the periphery of axle center C30 to the 1st eccentric body 21 of axle 30 is it is also possible to by the 1st eccentric body
1st inner ring 41A of bearing 41 is assembled on the periphery of the 1st eccentric body 21.
In other words, there is the eccentric swing of the 1st eccentric body bearing 41 with the 1st inner ring 41A in the 1st eccentric body 21 over-assemble
In type geared system G, in the past, in order to assemble the 1st eccentric body bearing 41 with inner ring it is impossible to will bent axle 30 ratio the 1st eccentric
Body 21 more leans on the external diameter of the end side in axial direction to be set to more than minimum eccentric distance (R21-e21).But according to above-mentioned embodiment,
The 1st eccentric body bearing 41 with the 1st inner ring 41A can not only be assembled, but also can more will lean on axially than the 1st eccentric body 21
On the external diameter of end side be set to more than minimum eccentric distance (R21-e21).
Thus, for example, in the case of forming size identical hollow bulb 30G in bent axle 30, shape can be improved further
Become the intensity of the screw 30T periphery of large-diameter portion 30L.If from the viewpoint of contrary, with respect to having identical eccentric body
For 20 bent axle 30, bigger hollow bulb 30G can be formed.But, the bent axle of the present invention is not necessarily to hollow bulb,
It can be solid bent axle.
In addition, in the above-described embodiment, (the 1st) crankshaft bearing 71 is made up of the roller 71C without special inner ring, and
And it is made up of the rolling surface of this roller 71C minor diameter part 30S.Thus, it is possible to the configuration space of necessary crankshaft bearing originally is had
Effect ground is used for assembling the minor diameter part of eccentric body bearing such that it is able to prevent the length in axial direction from increasing as (dual-purpose).And, by
In crankshaft bearing, there is no inner ring, thus the size radially that need not increase crankshaft bearing can also increase the appearance of roller 71C
Amount.But, crankshaft bearing need not necessarily configure in minor diameter part.In this case, can adopt as crankshaft bearing and there is inner ring
Bearing.
And, in the above-described embodiment, large-diameter portion 30L is provided with screw 30T, and is linked using this screw 30T
Power transmission member (for the part of the power from driving source to bent axle transmission).But the utilization of large-diameter portion might not
It is defined in this example forming screw.For example form spline or keyway etc. it is also possible to be used in large-diameter portion, and using flower
Key or key are linking the situation of large-diameter portion and power transmission member.In this case, due to the wall thickness of large-diameter portion can be thickeied,
Therefore also can obtain and be able to ensure that higher power transfer strength or be able to ensure that the action effects such as bigger hollow bulb.
And, in the above-described embodiment, eccentric body 20 is formed as one with bent axle 30 at the very start.But eccentric body can
To be that the part with eccentric part being constituted split is attached at the structure in the main body of bent axle.
And, in the above-described embodiment, on the axle center C32 of non-wobble gear (being internal gear 32 in above-mentioned example) only
It is provided with a bent axle 30, so-called centre-crank formula Eccentrically swinging gear device and be suitable for the present invention.However, it is known that
Eccentrically swinging gear device also has to be provided with to have in the position offseting from the axle center of non-wobble gear makes wobble gear swing
Eccentric body multiple bent axles, the Eccentrically swinging gear device of so-called distribution formula.The present invention is readily adaptable for use in this point
Join eccentric body bearing between eccentric body and wobble gear for the configuration in the Eccentrically swinging gear device of formula and there is inner ring
Situation, and also it is obtained in that same action effect.
And, in the above-described embodiment, wobble gear is made up of external gear, non-wobble gear is made up of internal gear.But
It is that the reciprocal Eccentrically swinging gear device of relation of this external gear and internal gear is also known.In this geared system
In, it would however also be possible to employ external gear as non-wobble gear internal gear as the structure of wobble gear.
Claims (5)
1. a kind of Eccentrically swinging gear device, it possesses wobble gear, has the song of the eccentric body making this wobble gear swing
The axle and configuration eccentric body bearing between described eccentric body and described wobble gear, the spy of described Eccentrically swinging gear device
Levy and be,
Described eccentric body bearing has the outer inner ring being embedded in described eccentric body,
Described bent axle has to be arranged on and more leans on the large-diameter portion of end side in axial direction than described eccentric body and be arranged on this large-diameter portion
Minor diameter part and described eccentric body between,
The external diameter of described large-diameter portion is more than from the axle center of this bent axle the minimum range to the periphery of described eccentric body, and this is big
The external diameter in footpath portion is less than the internal diameter of the inner ring of described eccentric body bearing,
The external diameter of described minor diameter part is from below minimum range to the periphery of described eccentric body for the axle center of this bent axle, and should
Width in the axial direction of minor diameter part is more than the width in the axial direction of inner ring of described eccentric body bearing.
2. Eccentrically swinging gear device according to claim 1 it is characterised in that
Described Eccentrically swinging gear device has the body flange of sidepiece in the axial direction of described wobble gear for the configuration and configuration
Between this body flange and described bent axle and support described bent axle crankshaft bearing,
This crankshaft bearing does not have special inner ring and is made up of roller,
Described minor diameter part constitutes the rolling surface of this roller.
3. Eccentrically swinging gear device according to claim 1 and 2 it is characterised in that
In described large-diameter portion, it has been axially formed screw.
4. Eccentrically swinging gear device according to any one of claim 1 to 3 it is characterised in that
Described Eccentrically swinging gear device also has：
1st body flange, side in the axial direction of described wobble gear for the configuration；
2nd body flange, opposite side in the axial direction of described wobble gear for the configuration；And
Domestic, it is embedded in described 1st body flange and described 2nd body flange, and synchronous with the rotation composition of described wobble gear,
Described domestic be embedded in described 1st body flange with gap fiting mode, described domestic be embedded in interference fit
In described 2nd body flange.
5. Eccentrically swinging gear device according to claim 4 it is characterised in that
Object Part is linked to described 2nd body flange.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015168361A JP6498569B2 (en) | 2015-08-27 | 2015-08-27 | Eccentric rocking gear device |
| JP2015-168361 | 2015-08-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106481740A true CN106481740A (en) | 2017-03-08 |
| CN106481740B CN106481740B (en) | 2018-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610451419.8A Active CN106481740B (en) | 2015-08-27 | 2016-06-20 | Eccentric oscillation gear device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6498569B2 (en) |
| CN (1) | CN106481740B (en) |
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| KR20030048554A (en) * | 2001-12-12 | 2003-06-25 | 카츠지 쇼지 | Self-locking reduction device |
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| CN101294616A (en) * | 2007-04-24 | 2008-10-29 | 住友重机械工业株式会社 | Speed reduction apparatus for off-centering swing |
| JP2011038582A (en) * | 2009-08-10 | 2011-02-24 | Nabtesco Corp | Rocking type reduction gear |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010249164A (en) * | 2009-04-10 | 2010-11-04 | Ntn Corp | Railway vehicle drive unit |
| JP5887955B2 (en) * | 2012-01-26 | 2016-03-16 | セイコーエプソン株式会社 | Reducer and robot |
| JP5918705B2 (en) * | 2013-02-13 | 2016-05-18 | 住友重機械工業株式会社 | Planetary gear set |
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- 2016-06-20 CN CN201610451419.8A patent/CN106481740B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030048554A (en) * | 2001-12-12 | 2003-06-25 | 카츠지 쇼지 | Self-locking reduction device |
| CN101263319A (en) * | 2005-09-13 | 2008-09-10 | 纳博特斯克株式会社 | Eccentrically rocking type reduction gear |
| JP2008089157A (en) * | 2006-10-05 | 2008-04-17 | Nabtesco Corp | Reduction gear |
| CN101294616A (en) * | 2007-04-24 | 2008-10-29 | 住友重机械工业株式会社 | Speed reduction apparatus for off-centering swing |
| JP2011038582A (en) * | 2009-08-10 | 2011-02-24 | Nabtesco Corp | Rocking type reduction gear |
| CN102840279A (en) * | 2011-06-24 | 2012-12-26 | 住友重机械工业株式会社 | Oscillating internal engaged speed reduction gear |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017044288A (en) | 2017-03-02 |
| CN106481740B (en) | 2018-09-25 |
| JP6498569B2 (en) | 2019-04-10 |
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