CN109695665A - Eccentric oscillating-type deceleration device - Google Patents
Eccentric oscillating-type deceleration device Download PDFInfo
- Publication number
- CN109695665A CN109695665A CN201810723411.1A CN201810723411A CN109695665A CN 109695665 A CN109695665 A CN 109695665A CN 201810723411 A CN201810723411 A CN 201810723411A CN 109695665 A CN109695665 A CN 109695665A
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- Prior art keywords
- external gear
- gear
- external
- cotter way
- deceleration device
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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
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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
- F16H2001/325—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 a carrier with pins guiding at least one orbital gear with circular holes
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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
- F16H2001/327—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 with orbital gear sets comprising an internally toothed ring gear
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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 oscillating-type deceleration device of overlay film that lubricant can be adequately formed in export trade.Internal gear has internal tooth wheel body (26A), is set to the cotter way (26C) of internal tooth wheel body and is rotatably freely configured at the export trade (26B) of cotter way.And, cotter way have be set to the 1st external gear (22) radial outside and not with the 1st recess portion (261) of outer pin contacts, be set to the radial outside of the 2nd external gear (24) and not with the second recesses of outer pin contacts (262) and be set between the 1st recess portion and second recesses and with the contact portion of outer pin contacts (263), the end face (221 toward each other of 1st external gear and the 2nd external gear, 241) it is located at the radially inner side of contact portion, the periphery corner of end face toward each other is provided with backoff portion (222, 242), the backoff portion is more kept out of the way to radially inner side than the 1st external gear and the 2nd external gear and the position of outer pin contacts.
Description
The application is based on Japanese patent application 2017-204837 CLAIM OF PRIORITY filed on October 24th, 2017.
All the elements of the Japanese publication are applied in this specification by reference.
Technical field
The present invention relates to a kind of eccentric oscillating-type deceleration devices.
Background technique
Shown with a kind of eccentric oscillating-type deceleration device in Fig. 1 of patent document 1, have: internal gear and internal gear
The 1st external gear and the 2nd external gear, the eccentric body for making the 1st external gear and the 2nd external gear eccentric swing of engagement.Internal gear has
Internal tooth wheel body, the cotter way for being set to internal tooth wheel body and the export trade for being rotatably freely configured at cotter way.
Patent document 1: Japanese Unexamined Patent Publication 2013-124730 bulletin
If the overlay film of lubricant can be formed on the sliding surface of mechanical component, the durable of sliding surface can be improved
The effect of property.But in the eccentric oscillating-type deceleration device shown in patent document 1, exist because of the cunning between export trade and cotter way
It is dynamic and can not be the problem of being adequately formed the overlay film of lubricant in export trade.
Summary of the invention
The purpose of the present invention is to provide the eccentric swings that one kind can be adequately formed the overlay film of lubricant in export trade
Type deceleration device.
The present invention provides a kind of eccentric oscillating-type deceleration device, has: internal gear, the 1st engaged with the internal gear
External gear and the 2nd external gear, the eccentric shaft for making the 1st external gear and the 2nd external gear eccentric swing, wherein
The internal gear has internal tooth wheel body, is set to the cotter way of the internal tooth wheel body and is rotatably freely configured at
The export trade of the cotter way,
The cotter way have be set to the 1st external gear radial outside and not with the 1st recess portion of the outer pin contacts,
Be set to the radial outside of the 2nd external gear and not with the second recesses of the outer pin contacts and be set to the 1st recess portion with
Contact portion between the second recesses and with the outer pin contacts,
The end face toward each other of 1st external gear and the 2nd external gear is located at the radially inner side of the contact portion,
The periphery corner of the end face toward each other of 1st external gear and the 2nd external gear is provided with backoff portion,
The backoff portion is more moved back to radially inner side than the 1st external gear and the 2nd external gear and the position of the outer pin contacts
It keeps away.
Also, the present invention provides a kind of eccentric oscillating-type deceleration device, has: internal gear is engaged with the internal gear
The 1st external gear and the 2nd external gear, the eccentric shaft for making the 1st external gear and the 2nd external gear eccentric swing, wherein
The internal gear has internal tooth wheel body, is set to the cotter way of the internal tooth wheel body and is rotatably freely configured at
The export trade of the cotter way,
The export trade include the 1st small diameter portion for contacting with the 1st external gear and being separated with the inner surface of the cotter way,
Contacted with the 2nd external gear and separate with the inner surface of the cotter way the 2nd small diameter portion, the 1st small diameter portion with it is described
The usual diameter portion contacted between 2nd small diameter portion with the inner surface of the cotter way.
According to the present invention, the effect that the overlay film of lubricant can be adequately formed in export trade is obtained.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the eccentric oscillating-type deceleration device of the 1st embodiment according to the present invention.
Fig. 2 is the cross-sectional view for indicating the periphery of export trade of Fig. 1.
Fig. 3 (A) is the 1st perspective view for indicating the cotter way of internal gear, Fig. 3 (B) be indicate internal gear cotter way the 2nd
The perspective view of example.
Fig. 4 (A) is the 1st partial perspective view for indicating the external gear of Fig. 1, and Fig. 4 (B) is the 2nd for indicating external gear
Partial perspective view.
Fig. 5 is the cross-sectional view of the eccentric oscillating-type deceleration device of the 2nd embodiment according to the present invention.
Fig. 6 is the cross-sectional view for indicating the periphery of export trade of Fig. 5.
Fig. 7 (A) is the partial perspective view for indicating the 1st variation of external gear, and Fig. 7 (B) is the 2nd deformation for indicating external gear
The partial perspective view of example.
Fig. 8 is the periphery for indicating the export trade of eccentric oscillating-type deceleration device of the 3rd embodiment according to the present invention
Cross-sectional view.
In figure: G1, G2- eccentric oscillating-type deceleration device；12- eccentric shaft；The 1st eccentric body of 14-；The 2nd eccentric body of 16-；
The 1st external gear of 22-；The 2nd external gear of 24-；26- internal gear；26A- internal tooth wheel body；26B, 26X- export trade；26C- cotter way；28-
It is domestic；32- the 1st takes turns frame body；34- the 2nd takes turns frame body；221, the end face 241- (end face toward each other)；222,222B,222C,
222X, 242- backoff portion；223,243- teeth portion；224, the end face 244-；226,246- inner pinhole；261,261A, 261X- the 1st is recessed
Portion；262,262A, 262X- second recesses；263,263A, 264,264A, 265,265A- contact portion；The 1st small diameter portion of 26X1-；
The 2nd small diameter portion of 26X2-；The usual diameter portion 26X3,26X4,26X5-.
Specific embodiment
Hereinafter, each embodiment of the invention is described in detail with reference to attached drawing.
(the 1st embodiment)
Fig. 1 is the cross-sectional view of the eccentric oscillating-type deceleration device of the 1st embodiment according to the present invention.Fig. 2 is to indicate
The cross-sectional view on the periphery of the export trade of Fig. 1.Fig. 3 (A) is the 1st perspective view for indicating the cotter way of internal gear, and Fig. 3 (B) is to indicate
2nd perspective view of the cotter way of internal gear.Fig. 4 (A) is the 1st partial perspective view for indicating the external gear of Fig. 1, Fig. 4 (B)
It is the 2nd partial perspective view for indicating external gear.It in the present specification, will be along the rotary shaft of eccentric oscillating-type deceleration device G1
The direction definition of O1 is axial, will be radial direction with the direction definition of rotary shaft O1 square crossing, will be centered on rotary shaft O1
Direction of rotation is defined as circumferential direction.
Eccentric oscillating-type deceleration device G1 has: eccentric shaft 12, warp with the 1st eccentric body 14 and the 2nd eccentric body 16
1st external gear 22 of the periphery of the 1st eccentric body 14 is assembled in by roller bearing 18, is assembled in the 2nd bias via roller bearing 20
2nd external gear 24 of the periphery of body 16.In addition, Eccentrically rocking type reduction gear is also equipped with the 26, the 1st external gear 22 and the 2nd of internal gear
It is engaged while external gear 24 is swung with the internal gear 26.
Typical eccentric shaft 12 plays a role as the input shaft from device external input rotary motion, and with rotation
Shaft O1 pivots about movement.On eccentric shaft 12, it is linked with defeated such as gear, pulley using such as screw hole
Enter the component of side.
The outer peripheral surface of 1st eccentric body 14 has a curve form of cylindrical side, and the central axis of outer peripheral surface is from rotary shaft O1
It is eccentric.Similarly, the outer peripheral surface of the 2nd eccentric body 16 is also the side view of cylinder, and the central axis of outer peripheral surface is also from rotary shaft
O1 is eccentric.For example, the eccentric size of the 1st eccentric body 14 and the 2nd eccentric body 16 is equal to each other, eccentric direction is then with eccentric shaft
12 rotatable phase 180 degree different from each other etc..
1st external gear 22 is assembled in the periphery of the 1st eccentric body 14 via the 1st roller bearing 18 in a swingable manner,
And with 26 internal messing of internal gear.2nd external gear 24 is assembled in the 2nd bias via the 2nd roller bearing 20 in a swingable manner
The periphery of body 16, and with 26 internal messing of internal gear.In the position of the 1st external gear 22 and the 2nd external gear 24 deviated from its axle center
With multiple inner pinholes 226,246, and wherein through having multiple domestic 28.In addition, the 1st external gear 22 and the 2nd external gear 24 divide
Do not have the teeth portion 223,243 of trochoid tooth profile in outermost circumference (with reference to Fig. 4 (A) and Fig. 4 (B)).The external tooth of 1st external gear 22
Quantity it is equal with the quantity of external tooth of the 2nd external gear 24.
Internal gear 26 includes the inner circumferential for the integrated internal tooth wheel body 26A of shell 31, being set to internal tooth wheel body 26A
Multiple cotter way 26C of side, the multiple export trade 26B being rotatably freely supported in each cotter way 26C.Export trade 26B shape cylindrical
Shape.The quantity of the external tooth of the quantity (radical of export trade 26B) and the 1st external gear 22 of the internal tooth of internal gear 26 it is slightly different (such as
More 1).
In the case where the 1st external gear 22 and the 2nd external gear 24 are considered as a group parts, in the axial direction of a group parts
Side and the other side be linked with respectively the 1st wheel frame body 32 and the 2nd take turns frame body 34.1st wheel frame body 32 and the 2nd is taken turns frame body 34 and is distinguished
Shell 31 is supported on via the 1st angular contact ball bearing 36 and the 2nd angular contact ball bearing 38 that assemble with back-to-back configuration mode.And
And the 1st wheel frame body 32 and the 2nd take turns frame body 34 eccentric shaft 12 is rotatably supported via ball bearing 40,42.
< decelerating effect >
According to above structure, if eccentric shaft 12 rotates, the 1st eccentric body 14 and the 2nd eccentric body 16 are eccentrically rotated, so that
1st external gear 22 and the 2nd external gear 24 are swung with the phase difference of 180 degree.Since there are two external gear (the 1st external gears for tool
22 and the 2nd external gear 24), it is thus possible to realize the increase of transfer capacity and the maintenance of intensity, and because the 1st external gear 22 and the
2 external gears 24 are swung with the phase difference of 180 degree, it is thus possible to keep the spin balancing of eccentric oscillating-type deceleration device G1.
1st external gear 22 and the 2nd external gear 24 and 26 internal messing of internal gear, in the 1st embodiment, internal tooth wheel body
26A is integrated with shell 31.Therefore, the every rotation of eccentric shaft 12 1 time, the 1st external gear 22 and the 2nd external gear 24 are relative to internal tooth
Take turns 26 relative rotation (rotation) and teeth number difference a considerable amount.The rotation component of 1st external gear 22 and the 2nd external gear 24 is via running through
Inner pinhole 226,246 domestic 28 and be transferred to the 1st wheel frame body 32 and the 2nd take turns frame body 34.As a result, the rotation of eccentric shaft 12
Movement is slowed down with the reduction ratio of " 1/ (the common number of teeth of the 1st external gear 22 and the 2nd external gear 24) ", and as the 1st
It takes turns the rotation of frame body 32 and the 2nd wheel frame body 34 and exports.
The detailed content > on the periphery of < export trade
As shown in Fig. 2 and Fig. 3 (A), in the cotter way 26C of internal gear 26, it is provided in the radial outside of the 1st external gear 22
The 1st recess portion 261 not contacted with export trade 26B is provided with the 2nd not contacted with export trade 26B in the radial outside of the 2nd external gear 24
Recess portion 262.In addition, being provided between the 1st recess portion 261 and second recesses 262 and being connect with what export trade 26B was contacted in cotter way 26C
Contact portion 263.Also, in the case where the 1st recess portion 261, the contact portion 263 in center and second recesses 262 are considered as one group of structure,
Two sides in the axial direction of one group of structure are respectively arranged with the contact portion 264,265 of two end sides contacted with export trade 26B.
As shown in Fig. 3 (A), in cotter way 26C, contact portion 263,264,265 has the shape of the outer peripheral surface along export trade 26B
(that is, curve form of cylindrical side).Also, the 1st recess portion 261 and second recesses 262 have the curved form of substantially cylindrical side
Shape, but have a diameter larger than the diameter of export trade 26B or the diameter of contact portion 263,264,265.In addition, as shown in Fig. 3 (B), in pin
In slot 26C, the 1st recess portion 261X and second recesses 262X can be set also to replace the 1st recess portion 261 and second recesses 262.1st is recessed
Portion 261X and second recesses 262X are configured to, the form of the slot of concave along the circumferentially continuous formation of internal tooth wheel body 26A.
The diameter that the end face 221,241 toward each other of 1st external gear 22 and the 2nd external gear 24 is located at contact portion 263 is inside
Side.Also, it is arranged in the periphery corner of the end face 241 in the periphery corner and the 2nd external gear 24 of the end face 221 of the 1st external gear 22
There is a backoff portion 222,242, the backoff portion 222,242 to the 1 external gears 22 and the 2nd external gear 24 are contacted with export trade 26B
More keep out of the way to radially inner side at position.
As shown in Fig. 4 (A), backoff portion 222 is by from the peak potion position of teeth portion 223 to the widened inclination of valley position roughly planar
Face is constituted.Inclined surface closer to axially external mode closer to radial outside relative to end face 221 then to tilt.Here, axis
Refer to outward: from end face 221 towards the direction of the end face of opposite side 224.In this configuration, backoff portion 222 is in teeth portion 223
Peak potion position is formed as larger, is formed as smaller in valley position.In addition, also can be set as shown in Fig. 4 (B) in the 1st external gear 22
Have a backoff portion 222X, the backoff portion 222X in the axial direction at the peak potion position of teeth portion 223 width dimensions and valley position at
Width dimensions in axial direction are roughly equal.Backoff portion 222X is from the peak potion position of teeth portion 223 throughout valley position and relative to end face 221
With roughly the same angle tilt.The backoff portion 242 of 2nd external gear 24 also can have identical with the shape of backoff portion 222
In addition shape also can have the shape as backoff portion 222X.
As shown in Fig. 2, when section view, the width L1 of the 1st recess portion 261 in the axial direction be longer than the 1st external gear 22 and export trade 26B it
Between contact surface S1 width L3 in the axial direction, when from radial, the whole region in the axial direction of contact surface S1 is contained in the 1st
The inside of recess portion 261.That is, the axially external end p1 of 1st recess portion 261 is located at than the 1st external gear 22 when from radial
Axially external end p3 more leans on axially external.Also, when from radial, axially external end p4 of backoff portion 222
It is more leaned in the end p2 of the axially inner side than the 1st recess portion 261 axially external.Here, axially external refer to: in the axial direction, from the 1st
Towards the direction of the end face 224 on the outside of device, axially inner side refers to for the end face 221 of the device center side of external gear 22: in axial direction
On, from the end face 224 on the outside of device towards the direction of the end face of device center side 221.Also, each end p1 in Fig. 2~
Position when p4 is indicated from radial.
Similarly, when section view, the width L2 of second recesses 262 in the axial direction is longer than between the 2nd external gear 24 and export trade 26B
Contact surface S2 in axial width L4, when from radial, the whole region in the axial direction of contact surface S2 is contained in second recesses
262 inside.That is, the axially external end p5 of second recesses 262 is located at the axial direction than the 2nd external gear 24 when from radial
The end p7 in outside more leans on axially external.Also, from when radial observation, the axially external end p8 of backoff portion 242 positioned at than
The end p6 of the axially inner side of second recesses 262 more leans on axially external.Here, axially external refer to: in the axial direction, from the 2nd external tooth
The end face 241 of 24 device center side is taken turns towards the direction of the end face 244 on the outside of device, axially inner side refers to: in the axial direction, from
The direction of end face 244 on the outside of device towards the end face of device center side 241.Also, each end p5~p8 in Fig. 2 is indicated
Position when from radial.
Also, according to above structure, the width L5 of centrally located contact portion 263 in the axial direction is less than the 1st external gear 22
Backoff portion 222 and the 2nd external gear 24 the overall width L6 in the axial direction of backoff portion 242.
In addition, the section of Fig. 2 indicates cutting for a certain angle position in the circumferential direction of the 1st external gear 22 and the 2nd external gear 24
Face.If the configuration between the configuration relation and second recesses 262 and contact surface S2 between above-mentioned 1st recess portion 261 and contact surface S1 is closed
It is set up on the section of all angle positions tied up in the circumferential direction of the 1st external gear 22 and the 2nd external gear 24, then its effect is more
It is excellent.But above-mentioned configuration relation is not necessarily to set up on the section of all angle positions, as long as in the angular range of majority
Upper establishment can play aftermentioned sufficient effect.
Also, the end face 221 of the 1st external gear 22 and the end face 241 of the 2nd external gear 24 are shown in the 1st embodiment
The structure being in contact with each other, still, such as can also be using the end face 221 of the 1st external gear 22 and the end face 241 of the 2nd external gear 24
The structure separated from each other via spacer.
The effect > on the periphery of < export trade
When the 1st external gear 22 and the 2nd external gear 24 are swung, from the 1st external gear 22 and the 2nd external gear 24 via connecing
Contacting surface S1, S2 (refer to Fig. 2) applies contact face pressure to export trade 26B so that export trade 26B in the state of by the contact face pressure
It is rotated on the inside of the cotter way 26C of internal gear 26.At this point, export trade 26B and cotter way 26C sliding contact, still, due to applying
With the presence of the 1st recess portion 261 of opposite side and second recesses 262 of contact surface S1, S2 of biggish contact face pressure, therefore in the part
Export trade 26B is not contacted with the inner surface of cotter way 26C.
In the previous structure of no 1st recess portion 261, second recesses 262 and backoff portion 222,242, it is based on from external gear
Be applied to the contact face pressure of export trade, the opposite side in the side contacted with external gear, biggish contact face pressure be applied to export trade with
Between the inner surface of cotter way.Also, since the inner surface of export trade and cotter way is sliding in the state of having the biggish contact face pressure
Dynamic contact, therefore there are problems that being difficult to form the overlay film of lubricating oil in the part of export trade.
In this regard, being applied with large contact surface as above-mentioned in the eccentric oscillating-type deceleration device G1 of the 1st embodiment
The part of pressure will not generate sliding contact and in export trade 26B and the 1st external gear 22 between export trade 26B and the inner surface of cotter way 26C
And the 2nd generate between external gear 24 and be in rolling contact.The lubricating oil being adequately formed as a result, in the entire outer peripheral surface of export trade 26B
Overlay film.
In addition, since the contact portion 263 between the 1st recess portion 261 and second recesses 262 of cotter way 26C is contacted with export trade 26B,
Therefore it can ensure higher supporting rigidity between cotter way 26C and export trade 26B.Further, it is possible in internal gear 26 and the 1st external tooth
Ensure higher supporting rigidity between the 22 and the 2nd external gear 24 of wheel.Also, thereby, it is possible to improve eccentric oscillating-type deceleration device
The torsional rigid of G1.
As described above, according to the eccentric oscillating-type deceleration device G1 of the 1st embodiment, in the 1st external gear 22 of cotter way 26C
And the 2nd the radial outside position of external gear 24 be respectively arranged with the 1st recess portion 261 and second recesses 262.In addition, the 1st external gear 22
And the 2nd external gear 24 contact portion 263 of the end face 221,241 between the 1st recess portion 261 and second recesses 262 diameter it is inside
Side is provided with backoff portion 222,242 in the periphery corner of end face 221,241.Thereby, it is possible to the entire outer peripheral surfaces in export trade 26B
It is adequately formed the overlay film of lubricating oil, can be improved the durability of export trade 26B and cotter way 26C.In addition, due to the contact portion in center
263 presence, the 1st external gear 22 and the 2nd external gear 24 are able to maintain that higher supporting rigidity, so as to improve eccentric swing
The torsional rigid of type deceleration device G1.
Also, according to the eccentric oscillating-type deceleration device G1 of the 1st embodiment, as shown in Fig. 2, backoff portion 222 and keeping out of the way
Total length L 6 in the axial direction in portion 242 is greater than the width L5 in the axial direction of centrally located contact portion 263.Therefore, it can reduce
The contact surface straightening that export trade 26B is applied to from the 1st external gear 22 and the 2nd external gear 24 in the axial central range of export trade 26B
Connect the position for being transferred to the contact portion 263 of cotter way 26C.Therefore, can be further reduced in export trade 26B with biggish contact surface
The position for pressing and generating sliding contact, thus, it is possible to be adequately formed overlay film on export trade 26B.
In addition, according to the eccentric oscillating-type deceleration device G1 of the 1st embodiment, as shown in Fig. 2, when from radial, the 1st
The axially external end p1 of recess portion 261 is axially external positioned at more leaning on than the axially external end p3 of the 1st external gear 22.Together
Sample, when from radial, the axially external end p5 of second recesses 262 is located at the axially external end than the 2nd external gear 24
P7 more leans on axially external.By using the structure, in the axially external range of export trade 26B, can also eliminate from the 1st external tooth
The contact surface pressure that the 22 and the 2nd external gear 24 of wheel is applied to export trade 26B is transferred directly to the portion of the contact portion 264,265 of cotter way 26C
Position.Therefore, it can be further reduced the position that sliding contact is generated with biggish contact face pressure in export trade 26B, thus, it is possible to
It is enough to be adequately formed overlay film on export trade 26B.
(the 2nd embodiment)
Fig. 5 is the cross-sectional view of the eccentric oscillating-type deceleration device of the 2nd embodiment according to the present invention.Fig. 6 is to indicate
The cross-sectional view on the periphery of the export trade of Fig. 5.
The eccentric oscillating-type deceleration device G2 of the 2nd embodiment and eccentric oscillating-type deceleration device G1 of the 1st embodiment
The difference lies in that the shape of the 1st recess portion 261A and second recesses 262A of cotter way 26C is different.Hereinafter, to the 1st embodiment
Identical structure marks the same symbol, and detailed description will be omitted.
As shown in Figures 5 and 6, it is provided in the cotter way 26C of the 2nd embodiment and the trim line in circumferential orthogonal section
For the 1st recess portion 261A and second recesses 262A of curve shape.1st recess portion 261A is set to the radial outside of the 1st external gear 22,
And it is not contacted with export trade 26B.Second recesses 262A is set to the radial outside of the 2nd external gear 24, and does not contact with export trade 26B.Separately
Outside, in the 1st recess portion 261A in cotter way 26C and the contact portion 263A contacted with export trade 26B is provided between second recesses 262.And
And in the case where the 1st recess portion 261A, second recesses 262A and contact portion 263A are considered as one group of structure, in one group of structure
Two sides in axial direction are respectively arranged with contact portion 264A, 265A of two end sides contacted with export trade 26B.
Contact portion 263A, 264A, 265A in cotter way 26C have the shape of the outer peripheral surface along export trade 26B (that is, cylindrical side
The curve form in face).1st recess portion 261A and second recesses 262A has the 1st recess portion 261 and second recesses of the 1st embodiment
The corner (corner on the boundary between the 1st recess portion 261 and second recesses 262 and contact portion 263,264,265) of 262 (Fig. 3 (A))
It is set as gentle shape.The corner of the 1st recess portion 261X and second recesses 262X (Fig. 3 (B)) of variation are set as alternatively, having
Gentle shape.
The diameter that the end face 221,241 toward each other of 1st external gear 22 and the 2nd external gear 24 is located at contact portion 263A is inside
Side.Also, it is identical as the 1st embodiment, in the periphery corner of the end face 221 of the 1st external gear 22 and the end face of the 2nd external gear 24
241 periphery corner is provided with backoff portion 222,242.In addition, backoff portion 222,242 can also be used corner (backoff portion
222, the corner on the boundary between 242 faces contacted with itself and export trade 26B) it is set as gentle so that the trim line in section is curvilinear
The structure of shape.
As shown in fig. 6, the width L1A of the 1st recess portion 261A in the axial direction is longer than between the 1st external gear 22 and export trade 26B
The width L3 of contact surface S1 in the axial direction, when from radial, the whole region in the axial direction of contact surface S1 is contained in the 1st recess portion
The inside of 261A.That is, the axially external end p1A of 1st recess portion 261A is located at than the 1st external gear 22 when from radial
Axially external end p3 more leans on axially external.Also, when from radial, axially external end p4 of backoff portion 222
It is more leaned in the end p2A of the axially inner side than the 1st recess portion 261A axially external.Axially external and axially inner side definition the such as the 1st
Shown in embodiment.Also, position when each end p1A, p2A, p3, p4 in Fig. 6 are indicated from radial.
Similarly, the width L2A in the axial direction of second recesses 262A is longer than the contact between the 2nd external gear 24 and export trade 26B
Width L4 in the axial direction of face S2, when from radial, the whole region in the axial direction of contact surface S2 is contained in second recesses 262A
Inside.That is, the axially external end p5A of second recesses 262A is located at the axial direction than the 2nd external gear 24 when from radial
The end p7 in outside more leans on axially external.Also, from when radial observation, the axially external end p8 of backoff portion 242 positioned at than
The end p6A of the axially inner side of second recesses 262A more leans on axially external position.Axially external and axially inner side definition such as
Shown in 1 embodiment.Also, position when each end p5A, p6A, p7, p8 in Fig. 6 are indicated from radial.
Also, according to above structure, the width L5A of centrally located contact portion 263A in the axial direction is less than the 1st external gear
The overall width L6 of 22 backoff portion 222 and the backoff portion 242 of the 2nd external gear 24 in the axial direction.
In addition, the section of Fig. 5 indicates a certain angle position in the circumferential of the 1st external gear 22 and the 2nd external gear 24
Section.If matching between the configuration relation and second recesses 262A and contact surface S2 between above-mentioned 1st recess portion 261A and contact surface S1
It sets relationship to set up on the section of all angle positions in the circumferential direction of the 1st external gear 22 and the 2nd external gear 24, then its effect
It is more excellent.But above-mentioned configuration relation is not necessarily to set up on the section of all angle positions, as long as in the angle of majority
Sufficient effect can be played by setting up in range.
Also, the end face 221 of the 1st external gear 22 and the end face 241 of the 2nd external gear 24 are shown in the 2nd embodiment
The structure being in contact with each other, still, such as can also be using the end face 221 of the 1st external gear 22 and the end face 241 of the 2nd external gear 24
The structure separated from each other via spacer.
The effect > on the periphery of < export trade
When the 1st external gear 22 and the 2nd external gear 24 are swung, from the 1st external gear 22 and the 2nd external gear 24 via connecing
Contacting surface S1, S2 (refer to Fig. 5) applies contact face pressure to export trade 26B so that export trade 26B in the state of by the contact face pressure
It is rotated on the inside of the cotter way 26C of internal gear 26.At this point, export trade 26B and cotter way 26C sliding contact, still, due to applying
With the presence of opposite side the 1st recess portion 261A and second recesses 262A of contact surface S1, S2 of biggish contact face pressure, therefore in the portion
Exceptionally pin 26B is not contacted with the inner surface of cotter way 26C.Therefore, be applied with it is biggish contact face pressure part, export trade 26B with
Sliding contact will not be generated between the inner surface of cotter way 26C, can be adequately formed lubricating oil in the entire outer peripheral surface of export trade 26B
Overlay film.
In addition, the 1st recess portion 261A and second recesses 262A of the 2nd embodiment have it with contact portion 263A, 264A,
The gentle curve form in the boundary of 265A.Therefore, even if in the case where export trade 26B flexible deformation due to contacting face pressure, contact
Face pressure will not concentrate on the boundary between the 1st recess portion 261A and second recesses 262A and contact portion 263A, 264A, 265A.
In addition, in the structure of the 2nd embodiment, due to having contact portion between the 1st recess portion 261A and second recesses 262A
263A is contacted with export trade 26B, therefore can ensure higher supporting rigidity between cotter way 26C and export trade 26B.Further, it is possible to
Ensure higher supporting rigidity between internal gear 26 and the 1st external gear 22 and the 2nd external gear 24.Thereby, it is possible to improve bias
The torsional rigid of oscillating-type deceleration device G1.
As described above, according to the eccentric oscillating-type deceleration device G2 of the 2nd embodiment, the 1st recess portion 261A of cotter way 26C and
Second recesses 262A has curve form.Therefore, even if in the case where export trade 26B flexible deformation due to contacting face pressure, contact surface
Pressure will not concentrate on the boundary between the 1st recess portion 261A and second recesses 262A and contact portion 263A, 264A, 265A, Neng Gouwei
Hold the overlay film for being formed in the lubricating oil of the part.Therefore, in addition to can obtain function and effect identical with the 1st embodiment with
Outside, additionally it is possible to further increase the durability of export trade 26B and cotter way 26C.
(variation)
Fig. 7 (A) is the partial perspective view for indicating the 1st variation of external gear, and Fig. 7 (B) is the 2nd deformation for indicating external gear
The partial perspective view of example.
The backoff portion 222 of 1st external gear 22 shown in 1st embodiment and the 2nd embodiment can also be deformed into such as Fig. 7
(A) backoff portion 222B shown in the or backoff portion 222C as shown in Fig. 7 (B).
The backoff portion 222C of the backoff portion 222B and Fig. 7 (B) of Fig. 7 (A) are with the ladder-like teeth portion for being formed in the 1st external gear 22
Between 223 and end face 221.The periphery corner of the end face 221 of the 1st external gear 22 is more kept out of the way to radially inner side than teeth portion 223 as a result,
Without being contacted with export trade 26B.As shown in Fig. 7 (A), stair-stepping backoff portion 222B, 222C is formed as, in the 1st external gear 22
Circumferential direction on each the 1st external gear 22 of portion's distance axle center radial height constant.Alternatively, as shown in Fig. 7 (B), it can also
It is roughly equal with the difference of height and the difference of height apart from valley that are formed as its peak potion apart from teeth portion 223.
The backoff portion 242 of 2nd external gear 24 can also be applied and Fig. 7 (A) and the identical deformation of Fig. 7 (B).
Effect effect identical with the 1st embodiment and the 2nd embodiment can also be obtained using the structure of the 1st variation
Fruit.
(the 3rd embodiment)
Fig. 8 is the periphery for indicating the export trade of eccentric oscillating-type deceleration device of the 3rd embodiment according to the present invention
Cross-sectional view.
The structure and the 1st embodiment on the export trade 26X of the eccentric oscillating-type deceleration device of the 3rd embodiment and its periphery and
2nd embodiment is different, and the structure of other parts is then identical as the 1st embodiment and the 2nd embodiment.In the following, omission pair
Identical structure is described in detail.
The cotter way 26C of the internal gear 26 of 3rd embodiment does not have as shown in the 1st embodiment or the 2nd embodiment simultaneously
Recess portion, the inner surface of cotter way 26C has the curve form of cylindrical side.
The export trade 26X of 3rd embodiment is the pin member with the 1st small diameter portion 26X1 and the 2nd small diameter portion 26X2.1st
Small diameter portion 26X1 is located at the radial outside of the 1st external gear 22, is contacted with teeth portion 223 without contacting with the inner surface of cotter way 26C.
2nd small diameter portion 26X2 is located at the radial outside of the 2nd external gear 24, is contacted with teeth portion 243 without connecing with the inner surface of cotter way 26C
Touching.
Diameter is provided with than the 1st small diameter portion 26X1 between the 1st small diameter portion 26X1 of export trade 26X and the 2nd small diameter portion 26X2
Diameter and the 2nd small diameter portion 26X2 the big usual diameter portion 26X3 of diameter.Also, the 1st small diameter portion of ratio in the axial direction of export trade 26X
It is more straight than the diameter of the 1st small diameter portion 26X1 and the 2nd small diameter portion 26X2 that 26X1 and the 2nd small diameter portion 26X2 is more provided with diameter by end side
Diameter big usual diameter portion 26X4,26X5.Usual diameter portion 26X3,26X4,26X5 are not and outside the teeth portion 223 and the 2nd of the 1st external gear 22
The teeth portion 243 of gear 24 is contacted and is contacted with the inner surface of cotter way 26C.1st small diameter portion 26X1, the 2nd small diameter portion 26X2 and usually
Diameter portion 26X3,26X4,26X5 have cylindrical concentrically with respect to one another.
In the eccentric oscillating-type deceleration device of the 3rd embodiment, put in the 1st external gear 22 and the 2nd external gear 24
When dynamic, export trade 26X is receiving biggish contact surface from the teeth portion 223 of the 1st external gear 22 and the teeth portion 243 of the 2nd external gear 24
It is rotated on the inside of cotter way 26C in the state of pressure.At this point, export trade 26X and cotter way 26C sliding contact, still, due to export trade
There are the 1st small diameter portion 26X1 and the 2nd small diameter portion 26X2 by 26X, thus are applied with the phase of the teeth portion 223,243 of biggish contact face pressure
It tosses about and is not contacted with cotter way 26C.Therefore, according to the speed reduction apparatus for off-centering swing of the 3rd embodiment, it is being applied with biggish contact
The part of face pressure, export trade 26X will not generate sliding contact, form sufficient profit so as to the entire outer peripheral surface in export trade 26X
The overlay film of lubricating oil.Thereby, it is possible to improve the durability of export trade 26X.
In addition, the 1st small diameter portion according to the eccentric oscillating-type deceleration device of the 3rd embodiment, in the axial direction of export trade 26X
The two sides of 26X1 and the two sides of the 2nd small diameter portion 26X2 are contacted by usual diameter portion 26X3,26X4,26X5 with cotter way 26C.Cause
This can ensure higher supporting rigidity between cotter way 26C and export trade 26X, and thereby, it is possible in internal gear 26 and the 1st external tooth
Ensure higher supporting rigidity between the 22 and the 2nd external gear 24 of wheel.Thereby, it is possible to improve the eccentric oscillating-type of the 3rd embodiment
The torsional rigid of deceleration device.
More than, each embodiment of the invention is illustrated.But the present invention is not limited to above-mentioned embodiment party
Formula.For example, showing the so-called middle innermost being that an eccentric shaft is configured to the axle center of speed reducer in the above-described embodiment
The eccentric oscillating-type deceleration device of shank type.But the present invention is readily applicable to match in the position deviated from the axle center of speed reducer
It is equipped with the eccentric oscillating-type deceleration device of the so-called distribution formula of more than two eccentric shafts.
Also, show in the above-described embodiment by the present invention be suitable for have there are two the eccentric oscillating-type of external gear subtract
The example of speed variator fills but it is also possible to which the present invention is suitable for having slowing down there are three the eccentric oscillating-type of above external gear
It sets.At this point, any one gear in three or more external gears is equivalent to the 1st external gear, another gear adjacent thereto
It is equivalent to the 2nd external gear.In addition, without departing from the scope of spirit of the present invention may be used about the details described in embodiment
Suitably to be changed.
Claims (6)
1. a kind of eccentric oscillating-type deceleration device, has: outside internal gear, the 1st external gear and the 2nd engaged with the internal gear
Gear, the eccentric shaft for making the 1st external gear and the 2nd external gear eccentric swing, the eccentric oscillating-type deceleration device
It is characterized in that,
The internal gear has internal tooth wheel body, is set to the cotter way of the internal tooth wheel body and is rotatably freely configured at described
The export trade of cotter way,
The cotter way have be set to the 1st external gear radial outside and not with the 1st recess portion of the outer pin contacts, setting
In the 2nd external gear radial outside and not with the second recesses of the outer pin contacts and be set to the 1st recess portion with it is described
Contact portion between second recesses and with the outer pin contacts,
The end face toward each other of 1st external gear and the 2nd external gear is located at the radially inner side of the contact portion,
The periphery corner of the end face toward each other of 1st external gear and the 2nd external gear is provided with backoff portion, it is described
Backoff portion is more kept out of the way to radially inner side than the 1st external gear and the 2nd external gear and the position of the outer pin contacts.
2. eccentric oscillating-type deceleration device according to claim 1, which is characterized in that
The length of the backoff portion in the axial direction is greater than the length of the contact portion in the axial direction.
3. eccentric oscillating-type deceleration device according to claim 1 or 2, which is characterized in that
On the section orthogonal with the circumferential direction of the internal gear, the 1st recess portion and the second recesses have curve shape.
4. eccentric oscillating-type deceleration device according to any one of claim 1 to 3, which is characterized in that
Will the axial upper end face toward each other from the 1st external gear and the 2nd external gear towards the 1st external gear
Opposite side end face direction be set as axially external in the case where,
When from radial, the axially external end of the 1st recess portion is located at the axially external end than the 1st external gear
Portion more leans on axially external.
5. eccentric oscillating-type deceleration device according to any one of claim 1 to 4, which is characterized in that
Will the axial upper end face toward each other from the 1st external gear and the 2nd external gear towards the 2nd external gear
Opposite side end face direction be set as axially external in the case where,
When from radial, the axially external end of the second recesses is located at the axially external end than the 2nd external gear
Portion more leans on axially external.
6. a kind of eccentric oscillating-type deceleration device, has: outside internal gear, the 1st external gear and the 2nd engaged with the internal gear
Gear, the eccentric shaft for making the 1st external gear and the 2nd external gear eccentric swing, the eccentric oscillating-type deceleration device
It is characterized in that,
The internal gear has internal tooth wheel body, is set to the cotter way of the internal tooth wheel body and is rotatably freely configured at described
The export trade of cotter way,
The export trade is included to be contacted and the 1st small diameter portion separated with the inner surface of the cotter way and institute with the 1st external gear
The 2nd small diameter portion, small in the 1st small diameter portion and the described 2nd stating the contact of the 2nd external gear and separating with the inner surface of the cotter way
The usual diameter portion contacted between diameter portion with the inner surface of the cotter way.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-204837 | 2017-10-24 | ||
| JP2017204837A JP6938332B2 (en) | 2017-10-24 | 2017-10-24 | Eccentric swing type speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109695665A true CN109695665A (en) | 2019-04-30 |
Family
ID=66230010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810723411.1A Pending CN109695665A (en) | 2017-10-24 | 2018-07-04 | Eccentric oscillating-type deceleration device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6938332B2 (en) |
| CN (1) | CN109695665A (en) |
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| JP2014109336A (en) * | 2012-12-03 | 2014-06-12 | Sumitomo Heavy Ind Ltd | Pin and roller structure |
| JP2015021525A (en) * | 2013-07-17 | 2015-02-02 | Ntn株式会社 | In-wheel motor drive unit |
| WO2015133278A1 (en) * | 2014-03-04 | 2015-09-11 | Ntn株式会社 | In-wheel motor drive device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3723247B2 (en) * | 1995-01-27 | 2005-12-07 | 光洋精工株式会社 | Roller bearing cage |
| JP4927267B2 (en) * | 2001-07-19 | 2012-05-09 | 住友重機械工業株式会社 | Manufacturing method of rotating roller body, internal meshing planetary gear structure provided with rotating roller body, and rotating roller body |
| JP6031385B2 (en) * | 2013-03-13 | 2016-11-24 | 住友重機械工業株式会社 | Bending gear system |
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2017
- 2017-10-24 JP JP2017204837A patent/JP6938332B2/en active Active
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- 2018-07-04 CN CN201810723411.1A patent/CN109695665A/en active Pending
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|---|---|---|---|---|
| JPS5917066A (en) * | 1982-07-16 | 1984-01-28 | Sumitomo Heavy Ind Ltd | Lubricative supporting device for outer pin of rotation converting mechanism |
| JPS62194055A (en) * | 1986-02-19 | 1987-08-26 | Sumitomo Heavy Ind Ltd | Planetary beat speed increasing and decreasing device |
| JPS63243550A (en) * | 1987-03-27 | 1988-10-11 | Sumitomo Heavy Ind Ltd | Speed increasing/decreasing gear having planetary gear mechanism |
| US6231469B1 (en) * | 1997-12-11 | 2001-05-15 | Teijin Seiki Co., Ltd. | Internally meshing planetary gear device |
| JP2009191946A (en) * | 2008-02-14 | 2009-08-27 | Nabtesco Corp | Eccentric oscillation type gear device |
| WO2013061533A1 (en) * | 2011-10-25 | 2013-05-02 | ナブテスコ株式会社 | Gear transmission device |
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| JP2015021525A (en) * | 2013-07-17 | 2015-02-02 | Ntn株式会社 | In-wheel motor drive unit |
| WO2015133278A1 (en) * | 2014-03-04 | 2015-09-11 | Ntn株式会社 | In-wheel motor drive device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6938332B2 (en) | 2021-09-22 |
| JP2019078314A (en) | 2019-05-23 |
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