CN106481740B - Eccentric oscillation gear device - Google Patents
Eccentric oscillation gear device Download PDFInfo
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- CN106481740B CN106481740B CN201610451419.8A CN201610451419A CN106481740B CN 106481740 B CN106481740 B CN 106481740B CN 201610451419 A CN201610451419 A CN 201610451419A CN 106481740 B CN106481740 B CN 106481740B
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- Prior art keywords
- eccentric
- eccentric body
- diameter portion
- bearing
- bent axle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The present invention provides a kind of eccentric oscillation gear device.According to the present invention, in the eccentric oscillation gear device that eccentric body over-assemble has the eccentric body bearing with inner ring, the outer diameter for the end side that the ratio eccentric body of bent axle more leans in axial direction is ensured to be bigger.The eccentric oscillation gear device has wobble gear, the bent axle with eccentric body and eccentric body bearing, wherein, eccentric body bearing has inner ring, and bent axle, which has, to be arranged in the large-diameter portion for more leaning on the end side in axial direction than eccentric body and the small diameter portion that is arranged between the large-diameter portion and eccentric body.The outer diameter of large-diameter portion is more than the minimum eccentric distance until the axle center to the periphery of eccentric body of bent axle, and the outer diameter of the large-diameter portion is less than the internal diameter of the inner ring of eccentric body bearing, the outer diameter of small diameter portion is minimum eccentric distance hereinafter, and the width in the axial direction of the inner ring that is more than eccentric body bearing of the width in the axial direction of the small diameter portion.
Description
This application claims the preferences based on Japanese patent application the 2015-168361st filed in August in 2015 27 days.
The entire content of this Japanese application is incorporated by reference in this manual.
Technical field
The present invention relates to a kind of eccentric oscillation gear devices.
Background technology
A kind of eccentric oscillation gear device is disclosed in patent document 1.
The eccentric oscillation gear device have wobble gear, with make the wobble gear swing eccentric body bent axle and
Configure the eccentric body bearing between eccentric body and wobble gear.
The substantial middle of bent axle in its axial direction has eccentric body.The square with the axis section of eccentric body is circle.In order to
Wobble gear is set to swing, axle center of the eccentric body with the axle center bias relative to bent axle and inclined with the axle center relative to bent axle
The periphery of the heart.
In the geared system, eccentric body bearing has the outer inner ring for being embedded in eccentric body, the outer ring for being embedded in wobble gear
And rolling element of the configuration between inner ring and outer ring.
Patent document 1：Japanese Unexamined Patent Publication 2013-142447 bulletins
In eccentric oscillation gear device involved by patent document 1, the eccentric body Bearing configuration with inner ring is inclined
Between heart body and wobble gear.
When there will be the eccentric body bearing of inner ring to be assembled in eccentric body, the axle center for making inner ring and the axle center of eccentric body are needed
Unanimously, and make axial movement of the inner ring to eccentric body in this state.In order to realize that the movement, the ratio eccentric body of bent axle are more leaned on
The outer diameter of end side in axial direction is necessary for the minimum range until the axle center of bent axle to eccentric body periphery or less.Therefore, difficult
The outer diameter of the end side of bent axle is ensured to be larger, for example it is difficult to also by bent axle on the basis of ensuring necessary intensity
The internal diameter of hollow portion is ensured to be larger.
Invention content
The present invention completes to solve this conventional problems, and project is, has tool in eccentric body over-assemble
Have in the eccentric oscillation gear device of eccentric body bearing of inner ring, the ratio eccentric body of bent axle is more leaned on to the end side in axial direction
Outer diameter is ensured to be bigger.
The present invention solves the above subject by such as lower structure, that is, a kind of eccentric oscillation gear device has swing tooth
Wheel, the bent axle with the eccentric body for making wobble gear swing and configuration are inclined between the eccentric body and the wobble gear
Heart body bearing, wherein the eccentric body bearing has the inner ring for being embedded in the eccentric body outside, and the bent axle, which has, to be arranged than institute
The small diameter portion stated the large-diameter portion for the end side that eccentric body more leans in axial direction and be arranged between the large-diameter portion and the eccentric body, institute
The outer diameter for stating large-diameter portion is more than minimum range until the axle center of the bent axle to the periphery of the eccentric body, and the large-diameter portion
Outer diameter is less than the internal diameter of the inner ring of the eccentric body bearing, and the outer diameter of the small diameter portion is from the axle center of the bent axle to the bias
Minimum range until the periphery of body hereinafter, and the width in the axial direction of the small diameter portion be more than the inner ring of the eccentric body bearing
Width in axial direction.
In addition, in the present specification, " outer diameter " and " internal diameter " these terms are not necessarily referring to " diameter ", but " radius is (from axle center
Distance until periphery) " concept.
In the present invention, the outer 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 held can extend axially through the outside of large-diameter portion, so as to reach small diameter portion.In the axial direction of the small diameter portion of bent axle
Width is more than the width in the axial direction of the inner ring of eccentric body bearing.Also, the outer diameter of small diameter portion is from the axle center of bent axle to bias
Below minimum range until the periphery of body.Therefore, entire eccentric body bearing can be completely into the axial direction to small diameter portion
In width, and in the small diameter portion, by keeping the axle center of the inner ring of eccentric body bearing radially displaced, the eccentric shaft can be made
The axle center of the inner ring held is consistent with the axle center of eccentric body.
Even if the outer diameter of large-diameter portion is more than the minimum range until the axle center to the periphery of eccentric body of bent axle as a result,
The inner ring of eccentric body bearing can be assembled on eccentric body.
According to the present invention, there is the eccentric oscillation gear device of the eccentric body bearing with inner ring in eccentric body over-assemble
In, the outer diameter for the end side that the ratio eccentric body of bent axle more leans in axial direction can be ensured to be bigger.
Description of the drawings
Fig. 1 is the section view for the structure for indicating the eccentric oscillation gear device involved by an example of embodiments of the present invention
Figure.
Fig. 2 is the side view of the eccentric oscillation gear device of Fig. 1.
Fig. 3 is the section view indicated in the state of the bent axle over-assemble eccentric body bearing of the eccentric oscillation gear device of Fig. 1
Figure.
In figure：G- geared systems, the 1st external gears (wobble gear) of 11-, the 1st eccentric bodies of 21-, 30- bent axles, 30L- major diameters
Portion, 30S- small diameter portions, 36- is domestic, the 1st eccentric body bearings of 41-, the 1st inner rings of 41A-, the 1st body flanges of 51-, the 1st bent axle axis of 71-
It holds, the outer diameter of R30L- large-diameter portions, the outer diameter of R30S- small diameter portions, R21-e21- minimums eccentric distance (minimum range), r41A-
The internal diameter of 1st inner ring of 1 eccentric body bearing, the width in the axial direction of the 1st inner ring of the 1st eccentric body bearings of W41A-, W30S- are small
Width in the axial direction in diameter portion.
Specific implementation mode
Hereinafter, an example for the embodiment that the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is the section view for the structure for indicating the eccentric oscillation gear device involved by an example of 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 lines of Fig. 2.
Eccentric oscillation gear device G has：The external gear 10 (wobble gear) of axis swing, have make the external gear
The bent axle 30 of 10 eccentric bodies 20 swung.Bent axle 30 constitutes the input shaft of geared system G.To detailed after the structure of bent axle 30
It states.
In eccentric oscillation gear device G, has (the 1st external gear of two side-by-side external gear 10 as wobble gear
11 and the 2nd external gear 12).It, can be in the feelings for the size radially for being not added with canine tooth wheel apparatus G by having two external gears 10
Increase transfer capacity under condition.Each external gear 10 passes through two (the 1st eccentric bodies 21 and the 2nd of eccentric body 20 being formed on bent axle 30
Eccentric body 22) and swung (C11 and C12 are swung in axle center).In order to make the pendulum of the 1st external gear 11 and the 2nd external gear 12
Dynamic to be balanced, the 1st eccentric body 21 and the 2nd eccentric body 22 are eccentric with 180 ° of phase difference each other.To the structure of eccentric body 20 with
After be described in detail.
Eccentric body bearing 40 (the 1st eccentric body bearing 41 and the 2nd eccentric body are configured between eccentric body 20 and external gear 10
Bearing 42).Specifically, being configured with the 1st eccentric body bearing 41 between the 1st eccentric body 21 and the 1st external gear 11.Partially the 2nd
The 2nd eccentric body bearing 42 is configured 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 of ball bearing, and the ball bearing has outer the 1st inner ring for being embedded in the 1st eccentric body 21
41A, the 1st outer ring 41B for being embedded in the 1st external gear 11 and the 1st rolling being assembled 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 the structure being identical with this.
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 fixed (not swinging).Internal gear 32 have with 34 integrated internal tooth wheel body 32A of shell, be axially formed in the internal tooth
The cotter way 32B of wheel body 32A and be rotatably freely assembled in cotter way 32B and constitute the internal gear 32 internal tooth cylinder
Interior alligator 32C.The quantity (radical of alligator 32C in i.e.) of the internal tooth of internal gear 32 compares the quantity of the external tooth of the 1st external gear 11 slightly
More (one is only had more in this example).
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 (being the side opposite with load in this example) in the axial direction of external gear 10 is configured with the 1st body flange 51.
The other 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
It holds 60 (the 1st base bearing 61 and the 2nd base bearings 62) and is supported on shell 34 in a way freely spinning way.
In this embodiment, base bearing 60 is made of the angular contact ball bearing of back-to-back assembling.1st base bearing 61 has
With 51 integrated inner ring 61A of the 1st body flange, be embedded in the dedicated outer ring 61B of shell 34 and be assembled in inner ring 61A and outer ring
Rolling element (ball) 61C between 61B.2nd base bearing 62 also has the structure being identical with this.
It is multiple domestic through having from the position that its axle center C11, C12 are deviated in the 1st external gear 11 and the 2nd external gear 12
36.Since domestic 36 run through external gear 10, domestic 36 action is synchronous with the rotation of the external gear 10.1st external gear
11 and the 2nd external gear 12 is formed with for domestic 36 perforative multiple 1st inner pinhole 11A and the 2nd inner pinhole 12A.
Domestic 36 are embedded in the 1st body flange 51 and the 2nd body flange 52.It is formed in the 1st body flange 51 and is embedded in for domestic 36
The 1st domestic retaining hole 51A.It is formed with the 2nd domestic retaining hole 52A for domestic 36 insertion in the 2nd body flange 52.
More specifically, domestic 36 (configuration is in the side opposite with load) the 1st is embedded in gap fiting mode
1st domestic retaining hole 51A of body flange 51.Domestic 36 do not abut with the bottom 51A1 of the 1st domestic retaining hole 51A and (ensure between having
Gap δ 51A).On the other hand, domestic 36 (indentation) is embedded in (configuration is in load-side) the 2nd body flange 52 with interference fit type
The 2nd domestic retaining hole 52A.Domestic 36 abut with the bottom 52A1 of the 2nd domestic retaining hole 52A.Domestic 36 by with the bottom
52A1 abuts 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
Mode coaxial 52A, which extends through, is formed with the 1st through hole 51P and the 2nd through hole 52P.It is formed in the of 51 side of the 1st body flange
1 through hole 51P is as the lubrication via the gap delta 51A to supply lubricant between the domestic 36 and the 1st domestic retaining hole 51A
Access and function.Thereby, it is possible to inhibit to generate micro- vibration between the domestic 36 and the 1st domestic retaining hole 51A of clearance fit
Damage.
In contrast, the 2nd through hole 52P for being formed in 52 side of the 2nd body flange is inserted into as from domestic opposite side
Fixture (not shown) functions come the insertion hole of fixture when tapping domestic 36.Thereby, it is possible to easily from the 2nd
Domestic retaining hole 52A separation (decomposition) is embedded in interference fit type in the 2nd domestic retaining hole 52A of the 2nd body flange 52
Pin 36.
Object Part (driven member as driven member：Illustration omitted) with the 2nd body flange 52 (with interference fit
Mode is embedded with the body flange of domestic 36 side) connection.The symbol 52B of Fig. 1 indicates the bolt hole for object of connection component.
The rotation ingredient for 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 inhibit to loosen), and from
When object Part side is applied with radial load, excessive load can be prevented to be applied to domestic 36.
As described above, the combination of domestic 36 clearance fit and interference fit is most preferably in the convex of the side opposite with load
Edge side be gap-matched and the flange side of load-side using interference fit by the way of.But opposite side can also be used
Formula.That is, the flange side in the side opposite with load is matched on the flange side of load-side using gap using interference fit
It closes.
In addition, in this embodiment, the 1st body flange 51 and the 2nd body flange 52 link via domestic 36, and the 1st is convex
Edge body 51 and the 2nd body flange 52 also link via multiple wheel carrier pins 38.Wheel carrier pin 38 on circumference identical with domestic 36 and
It protrudes from the 2nd body flange 52 between each domestic 36 and is formed as one with the 2nd flange part 52.Wheel carrier pin 38 passes through convex from the 1st
The wheel carrier bolt 39 and the 1st body flange 51 that 51 side of edge body is screwed into link.Each 38 movable fit of wheel carrier pin (there are run through with gap)
In external gear 10.That is, even if external gear 10 does not contact if swinging wheel carrier pin 38 with external gear 10.
Also, in this embodiment, sliding promoting member is used as embedded with interior roller 74 outside domestic 36.One of interior roller 74
Divide and is abutted 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 outer diameter of interior roller 74 is less than
The internal diameter of 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 the 1st of twice of maximum the 1st eccentric amount e 21 for being equivalent to the 1st eccentric body 21 and the 2nd eccentric body 22 and the 2nd eccentric amount e 22
Gap delta 21 and the 2nd gap delta 22.The swing ingredient of external gear 10 is secured at the interior roller 74 and the 1st inner pinhole 11A and the 2nd are domestic
The 1st gap delta 21 and the 2nd gap delta 22 between the 12A of hole absorb.In addition, between the 1st external gear 11 and the 2nd external gear 12, folder
It is useful for the insertion ring 15 for inhibiting the 1st external gear 11 and the 2nd external gear 12 to move 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
Oil sealing 86 is configured between axis 30.Also, oil sealing 88 is configured between shell 34 and the 2nd body flange 52, in the 2nd body flange 52
Oil sealing 90 is also configured between bent axle 30.Symbol 92 indicates o-ring.By this structure, in radially outer of bent axle 30
Side is to geared system being sealed of G.It is sealed with lubricant in the inside of geared system G.
As described above, in terms of power transmission, 21 side of the 1st eccentric body has essentially identical knot with 22 side of the 2nd eccentric body
Structure.But in 21 side of the 1st eccentric body and 22 side of the 2nd eccentric body, for assemble eccentric body bearing 40 (the 1st eccentric body bearing 41 or
2nd eccentric body bearing 42) structure it is different.
In the present embodiment, it is desirable that the end side in the axial direction of the 1st eccentric body 21 of bent axle 30 is (opposite with load
Side) form the large-diameter portion 30L for being used to form aftermentioned screw hole 30T.Therefore, the present invention is suitable for the 1st eccentric body in bent axle 30
The structure of the 1st eccentric body bearing 41 of 21 over-assemble.
In contrast, the end side (load-side) in the axial direction of the 2nd eccentric body 22 of bent axle 30 not necessarily forms screw hole etc.,
Therefore large-diameter portion need not be formed.Therefore, the present invention is not suitable for the 2nd eccentric body of 22 over-assemble of the 2nd eccentric body in bent axle 30
The structure of bearing 42.
Therefore, hereinafter, mainly being carried out to the structure of the 1st eccentric body bearing 41 of 21 over-assemble of the 1st eccentric body in bent axle 30
Detailed description.
In conjunction with Fig. 3, bent axle 30 has the hollow portion 30G coaxial with axle center C30 in its radial center.Hollow portion 30G is along axis
Run through bent axle 30 to identical internal diameter r30G.Bent axle 30 has the 1st eccentric body in the side opposite with load of the bent axle 30
21, it is arranged in the large-diameter portion 30L for more leaning on the end side in axial direction than the 1st eccentric body 21 and setting in large-diameter portion 30L and the 1st
Small diameter portion 30S between eccentric body 21.
First, explanation is proceeded by from the structure of the 1st eccentric body 21 of bent axle 30.
Bent axle 30 is provided integrally with the 1st eccentric body 21 for making the 1st external gear 11 swing.The outer diameter of 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 1st eccentric body 21 is relative to bent axle
Eccentric 1st eccentric amount es 21 of 30 axle center C30.The shape in the square with the axis section of the 1st eccentric body 21 is the circle that outer 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 relative 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 (under being in Fig. 1, Fig. 3
Side) at the axle center C30 to the periphery of the 1st eccentric body 21 from bent axle 30 until distance become maximum eccentric distance (R21+
e21).Also, in the 1st eccentric body 21, at the minimum eccentric part of the 1st eccentric body 21 (being upside in Fig. 1, Fig. 3) from bent axle
Distance until 30 axle center C30 to the periphery of the 1st eccentric body 21 becomes minimum eccentric distance (R21-e21).
Width in the axial direction of 1st eccentric body 21 is W21.It has been observed that the axis of the 1st inner ring 41A of the 1st eccentric body bearing 41
Upward width is W41A.Width W21 in the axial direction of 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 of the bent axle 30 in the axial direction of the 1st eccentric body 21 of the bent axle 30 (is axial in the embodiment
On most end) have large-diameter portion 30L.Large-diameter portion 30L is the outer diameter between the small diameter portion 30S and axial end face 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.The outer diameter R30L of large-diameter portion 30L is more than the 1st partially
The minimum eccentric distance (R21-e21) (R30L ＞ (R21-e21)) until periphery of heart body 21.The outer 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 in the present example W30L, can be set as arbitrary width (being not particularly limited).
In addition, in this embodiment, " most end " in the axial direction of bent axle 30 is arranged in large-diameter portion 30L.But the present invention
Large-diameter portion it is not necessary that the most end in the axial direction of bent axle is centainly arranged.For example, more leaning on the end side in axial direction than large-diameter portion
There may also be the parts that outer diameter is less than the large-diameter portion.
Also, large-diameter portion can also be arranged " many places " of the end side in the axial direction of eccentric body.For example, in this embodiment party
In formula, circlip groove 30D is formed in large-diameter portion 30L.Can be the axis in the 1st eccentric body 21 by the Structure Understanding according to view
It is formed with large-diameter portion 30L, 30L2 at the two of upward end side and the both sides in the axial direction of circlip groove 30D.Than path
When the end side that portion is more leaned in axial direction is provided with the multiple portions for the condition for meeting the large-diameter portion of the present invention, multiple large-diameter portion is equal
It can be used as the large-diameter portion in the present invention and function.
The internal diameter r30G of the hollow portion 30G of bent axle 30 is constant, therefore the large-diameter portion 30L larger in outer diameter R30L, can be true
Protect relatively thick wall thickness t30L (=R30L-r30G).In this embodiment, in the major diameter of the wall thickness t30L thickness of the bent axle 30
Portion 30L has been axially formed screw hole 30T from the end face 30E in axial direction.Screw hole 30T is for linking to input shaft (i.e. bent axle 30)
Transmit component (such as the gear or belt wheel etc. of the power from driving source：Illustration omitted).
Bent axle 30 also has small diameter portion 30S between large-diameter portion 30L and the 1st eccentric body 21.
The small diameter portion 30S of bent axle 30 is the axle center C41 for making the 1st eccentric body bearing 41 when assembling the 1st eccentric body bearing 41
The region of displacement.The outer diameter R30S of small diameter portion 30S is less than the outer diameter R30L (R30S ＜ R30L) of large-diameter portion 30L.Small diameter portion 30S's
Axle center C30S is consistent with the axle center C30 of bent axle 30.That is, the axle center C30L and small diameter portion of the axle center C30 of bent axle 30, large-diameter portion 30L
The axle center C30S of 30S is concentric.
The outer diameter R30S of small diameter portion 30S is less than (can also be identical to) minimum eccentric distance (i.e. from the axle center C30 of bent axle 30
Minimum range (R21-e21) until the periphery of the 1st eccentric body 21), R30S≤(R21-e21).The outer diameter of small diameter portion 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 small diameter portion 30S is more than
Width W41A (W30S ＞ W41A) in the axial direction of 1st inner ring 41A of the 1st eccentric body bearing 41.
In addition, in eccentric oscillation gear device G, it has been observed that the side 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 of the configuration in the axial direction of external gear 10
Between, the 1st crankshaft bearing 71 configured with the side in the axial direction for supporting bent axle 30.
In this embodiment, the 1st crankshaft bearing 71 is made of the roller 71C without dedicated inner ring and outer ring.It is bent
The small diameter portion 30S of axis 30 constitutes the rolling surface for the roller for being somebody's turn to do and (do not have inner ring) the 1st crankshaft bearing 71.In addition, the symbol in Fig. 1
Number 71R indicates the retainer of the 1st crankshaft bearing 71.
It is biased against 20 side of eccentric body in the axial direction in the large-diameter portion 30L of bent axle 30, is formed with the circlip groove 30D.It is keeping off
Ring recess 30D configures baffle ring 80.Also, between the 1st eccentric body 21 and the 2nd eccentric body 22, it is formed with circumferentially around the prominent of a circle
Play portion 30P.Configured with the 1st eccentric body bearing 41, the liner 81 of wall thickness, the 1st bent axle axis between the baffle ring 80 and protrusion 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, between the 2nd body flange 52 and bent axle 30 for configuring the other side in the axial direction of the 2nd external gear 12, match
It is equipped with the 2nd crankshaft bearing 72 of the other side in the axial direction for supporting bent axle 30.2nd crankshaft bearing 72 is by dedicated inner ring
The ball bearing with rolling element (ball) 72C is constituted between 72A and outer ring 72B.
The configuration of 2nd crankshaft bearing 72 has most than the 2nd eccentric body 22 in bearing equipped section 30F, bearing equipped section 30F
The small eccentricity outer diameter R30F small from (minimum range until the axle center C30 to the periphery of the 2nd eccentric body 22 of bent axle 30).Cause
This, as described above, the 2nd eccentric body bearing 42 also can be assembled in bent axle 30 without a hitch by (even if not applicable present invention)
On 2nd eccentric body 22.
Then, the effect of the eccentric oscillation gear device G involved by present embodiment is illustrated.
First, before illustrating the relevant effect of assembling with the 1st eccentric body bearing 41, first illustrate the eccentric oscillating-type tooth
The effect of the power-transmission system of wheel apparatus G.
In the large-diameter portion 30L of bent axle 30 (input shaft), power transmission member (not shown) is linked with via screw hole 30T.If
Bent axle 30 is rotated by the power from driving source, then (the 1st partially for the eccentric body 20 being formed as one with the bent axle 30
Heart body 21 and the 2nd eccentric body 22) rotation.If eccentric body 20 rotate, via eccentric body bearing 40 (the 1st eccentric body bearing 41 and
2nd eccentric body bearing 42) be assembled in the eccentric body 20 periphery external gear 10 (the 1st external gear 11 and the 2nd external gear 12)
C11, C12 are swung in axle center.
External gear 10 and 32 internal messing of internal gear.The number of teeth of the internal tooth of the tooth ratio internal tooth wheel 32 of the external tooth of external gear 10
(radical of interior alligator 32C) only lacks one.Input shaft often rotates a circle as a result, and the phase of external gear 10 is relative to internal gear 32
Offset and teeth number difference a considerable amount (1 tooth amount), to carry out rotation.The rotation ingredient via the interior roller 74 through external gear 10 and
Domestic 36 are transferred to, to make domestic 36 to revolve round the sun around the axle center C32 (the axle center C30 of=bent axle 30) of internal gear 32.
By domestic 36 revolution, the axis of the 1st body flange 51 and the 2nd body flange 52 of bearing domestic 36 around internal gear 32
Heart C32 is rotated (rotation).By the rotation of the 1st body flange 51 and the 2nd body flange 52, the 2nd is linked to via bolt hole 52B
The object Part (driven member) of body flange 52 is driven.
Here, proceeding as follows the assembling of the 1st eccentric body bearing 41.
Fig. 3 is the sectional view for indicating the 1st eccentric body bearing 41 being assembled in the state on bent axle 30.
In this eccentric oscillation gear device G, the outer 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
It crosses large-diameter portion 30L and moves (P1 in Fig. 3) to the sides small diameter portion 30S.
In the axial direction for the 1st inner ring 41A that width W30S in the axial direction of small diameter portion 30S is more than the 1st eccentric body bearing 41
Width W41A.Therefore, entire 1st eccentric body bearing 41 is completely into the width W30S in the axial direction to small diameter portion 30S.And
And to be less than the minimum until the axle center C30 to the periphery of the 1st eccentric body 21 of bent axle 30 eccentric by the outer diameter R30S of small diameter portion 30S
Distance (R21-e21).
Therefore, in small diameter portion 30S, the axle center C41A of the 1st inner ring 41A of the 1st eccentric body bearing 41 can be made along diameter
It is moved to the axle center C30 (the axle center C30S of the axle center C30L=small diameter portions 30S of=large-diameter portion 30L) from original bent axle 30
The axle center C21 (P2 in Fig. 3) of 1 eccentric body 21.That is, in small diameter portion 30S, the 1st inner ring of the 1st eccentric body bearing 41 can 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 state, by the way that the 1st eccentric body bearing 41 is moved to 21 side of the 1st eccentric body, 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 outer diameter R30L of large-diameter portion 30L is more than from bent
Minimum eccentric distance (R21-e21) until the axle center C30 to the periphery of the 1st eccentric body 21 of axis 30, also can be 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 21 over-assemble of the 1st eccentric body
It, in the past, can not be eccentric by the ratio the 1st of bent axle 30 in order to assemble the 1st eccentric body bearing 41 with inner ring in type geared system G
The outer diameter for the end side that body 21 more leans in axial direction is set as being more than minimum eccentric distance (R21-e21).But according to the above embodiment,
The 1st eccentric body bearing 41 with the 1st inner ring 41A can not only be assembled, but also will can more be leaned on than the 1st eccentric body 21 axial
On the outer diameter of end side be set as being more than minimum eccentric distance (R21-e21).
As a result, for example, in the case of forming the identical hollow portion 30G of size in bent axle 30, shape can be further increased
At in the intensity on the peripheries screw hole 30T of large-diameter portion 30L.If from the viewpoint of opposite, relative to eccentric body having the same
For 20 bent axle 30, the hollow portion 30G of bigger can be formed.But bent axle of the invention is not necessarily to hollow portion,
It can be solid bent axle.
In addition, in the above-described embodiment, (the 1st) crankshaft bearing 71 is made of the roller 71C without special inner ring, and
And the rolling surface of roller 71C is made of small diameter portion 30S.Thus, it is possible to which the configuration space of necessary crankshaft bearing originally is had
Effect ground is used as the small diameter portion that (dual-purpose) is used to assemble eccentric body bearing, so as to prevent the length increase in axial direction.Also, by
Do not have inner ring in crankshaft bearing, because the appearance of roller 71C can also be increased without increasing the size radially of crankshaft bearing
Amount.But crankshaft bearing is configured without certain in small diameter portion.In this case, it can be used with inner ring as crankshaft bearing
Bearing.
Also, large-diameter portion 30L in the above-described embodiment, is provided with screw hole 30T, and is linked using screw hole 30T
Power transmission member (component for transmitting the power from driving source to bent axle).But the utilization of large-diameter portion might not
It is defined in this example for forming screw hole.Spline or keyway etc. are formed in large-diameter portion for example, can also be used in, and utilizes flower
Key or key link the situation of large-diameter portion and power transmission member.In this case, since the wall thickness of large-diameter portion can be thickeied,
Therefore it also can get effect the effects that capable of ensuring higher power transfer strength or can ensure the hollow portion of bigger.
Also, 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 the structure being attached at the seperated component with eccentric part constituted in the main body of bent axle.
Also, 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 arranged in the eccentric oscillation gear device of there are one bent axle 30, so-called centre-crank formula and has been applicable in the present invention.However, it is known that
Eccentric oscillation gear device, which also has to be provided with to have in the position deviated from the axle center of non-wobble gear, makes wobble gear swing
Eccentric body multiple bent axles, the eccentric oscillation gear device of so-called distribution formula.The present invention is readily applicable to this point
Eccentric body bearing of the configuration between eccentric body and wobble gear in eccentric oscillation gear device with formula has inner ring
Situation, and can also obtain same function and effect.
Also, in the above-described embodiment, wobble gear is made of external gear, and non-wobble gear is made of internal gear.But
It is that the reciprocal eccentric oscillation gear device of relationship of the external gear and internal gear is also well known.In this geared system
In, can also using external gear as non-wobble gear structure of the internal gear as wobble gear.
Claims (5)
1. a kind of eccentric oscillation gear device has wobble gear, the song with the eccentric body for making the wobble gear swing
The eccentric body bearing of axis and configuration between the eccentric body and the wobble gear, the spy of the eccentric oscillation gear device
Sign is,
The eccentric body bearing has the inner ring for being embedded in the eccentric body outside,
The bent axle, which has, to be arranged in the large-diameter portion for more leaning on the end side in axial direction than the eccentric body and setting in the large-diameter portion
With the small diameter portion between the eccentric body,
The outer diameter of the large-diameter portion is more than the minimum range until the axle center of the bent axle to the periphery of the eccentric body, and this is greatly
The outer diameter in diameter portion is less than the internal diameter of the inner ring of the eccentric body bearing,
The outer diameter of the small diameter portion be the minimum range until the axle center of the bent axle to the periphery of the eccentric body hereinafter, and this
Width in the axial direction for the inner ring that width in the axial direction of small diameter portion is more than the eccentric body bearing.
2. eccentric oscillation gear device according to claim 1, which is characterized in that
The eccentric oscillation gear device has body flange and the configuration of side of the configuration in the axial direction of the wobble gear
Between the body flange and the bent axle and the crankshaft bearing of the bearing bent axle,
The crankshaft bearing is made of without dedicated inner ring roller,
The small diameter portion constitutes the rolling surface of the roller.
3. eccentric oscillation gear device according to claim 1 or 2, which is characterized in that
In the large-diameter portion, it is axially formed screw hole.
4. eccentric oscillation gear device according to claim 1 or 2, which is characterized in that
The eccentric oscillation gear device also has：
1st body flange configures the side in the axial direction of the wobble gear；
2nd body flange configures the other side in the axial direction of the wobble gear；And
It is domestic, it is embedded in the 1st body flange and the 2nd body flange, and synchronous with the rotation ingredient of the wobble gear,
It is described it is domestic be embedded in the 1st body flange with gap fiting mode, it is described domestic to be embedded in interference fit type
In 2nd body flange.
5. eccentric oscillation gear device according to claim 4, which is characterized in that
Object Part is linked to the 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 CN106481740A (en) | 2017-03-08 |
| CN106481740B true 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) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101263319A (en) * | 2005-09-13 | 2008-09-10 | 纳博特斯克株式会社 | Eccentrically rocking type 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 |
| 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 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100801098B1 (en) * | 2001-12-12 | 2008-02-04 | 카츠지 쇼지 | Self-locking reduction device |
| JP4922719B2 (en) * | 2006-10-05 | 2012-04-25 | ナブテスコ株式会社 | Reduction gear |
| JP2010249164A (en) * | 2009-04-10 | 2010-11-04 | Ntn Corp | Railway vehicle drive unit |
| JP5388746B2 (en) * | 2009-08-10 | 2014-01-15 | ナブテスコ株式会社 | Swing type reducer |
| 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 |
-
2015
- 2015-08-27 JP JP2015168361A patent/JP6498569B2/en active Active
-
2016
- 2016-06-20 CN CN201610451419.8A patent/CN106481740B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101263319A (en) * | 2005-09-13 | 2008-09-10 | 纳博特斯克株式会社 | Eccentrically rocking type 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 |
| 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 |
|---|---|
| CN106481740A (en) | 2017-03-08 |
| JP2017044288A (en) | 2017-03-02 |
| JP6498569B2 (en) | 2019-04-10 |
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