CN104747657B - The manufacturing method of epicyclic gearing and its internal gear - Google Patents
The manufacturing method of epicyclic gearing and its internal gear Download PDFInfo
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- CN104747657B CN104747657B CN201410620713.8A CN201410620713A CN104747657B CN 104747657 B CN104747657 B CN 104747657B CN 201410620713 A CN201410620713 A CN 201410620713A CN 104747657 B CN104747657 B CN 104747657B
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- internal gear
- radial
- slot
- gear
- epicyclic gearing
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F5/00—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made
- B23F5/12—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by planing or slotting
- B23F5/16—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by planing or slotting the tool having a shape similar to that of a spur wheel or part thereof
- B23F5/163—Making straight gear teeth involving moving a tool relatively to a workpiece with a rolling-off or an enveloping motion with respect to the gear teeth to be made by planing or slotting the tool having a shape similar to that of a spur wheel or part thereof the tool and workpiece being in crossed axis arrangement, e.g. skiving, i.e. "Waelzschaelen"
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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
-
- 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
- F16H1/46—Systems consisting of a plurality of gear trains each with orbital gears, i.e. systems having three or more central gears
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Gear Processing (AREA)
Abstract
The present invention provides the manufacturing method of a kind of epicyclic gearing and its internal gear, and the present invention manufactures internal gear in epicyclic gearing with lower cost.The present invention relates to a kind of manufacturing methods of eccentric oscillating-type deceleration device, that is, epicyclic gearing (G) internal gear (30), the internal gear (30) that the eccentric oscillating-type deceleration device has external gear, that is, planetary gear (24) and engages with the external gear (24), this method scrapes processing by rotation and forms slot i.e. cotter way (34) in internal gear (30).
Description
This application claims based on Japanese patent application filed on December 25th, 2013 the 2013-268009th, 2014 years 8
Japanese patent application the 2014-167926th priority, the full content of the Japanese publication pass through ginseng filed in the moon 20
It examines and quotes in this manual.
Technical field
The present invention relates to a kind of epicyclic gearing and its manufacturing methods of internal gear.
Background technique
Eccentric oscillating-type deceleration device (epicyclic gearing) is disclosed in patent document 1.
The eccentric oscillating-type deceleration device has internal gear and is inscribed in the external gear of the internal gear while swinging
(planetary gear), the eccentric oscillating-type deceleration device are exported using the relative rotation of internal gear and external gear as output.
Internal gear be configured to be integrally formed with shell internal tooth wheel body, be formed in the internal tooth wheel body cotter way,
And it is configured at the pin member of the cotter way.Pin member can be rotated with the state for being configured at cotter way, to make the pin member
Engaging between external gear becomes smooth.
The cotter way is processed by wire pulling method, Gear Shaping or grinding.
Patent document 1: Japanese Unexamined Patent Publication 2000-130521 bulletin (Fig. 3, Fig. 5)
However, these processing methods there is a problem of it is at high cost.
Summary of the invention
The present invention is completed to solve the problems, such as this existing, and project is, in epicyclic gearing with
Lower cost manufactures internal gear.
The present invention solves the above subject by the following method: a kind of manufacturing method of the internal gear of epicyclic gearing, institute
Epicyclic gearing is stated with planetary gear and the internal gear engaged with the planetary gear, this method scrapes processing in institute by rotation
It states internal gear and forms slot.
Also, the present invention solves the above subject by following device: a kind of epicyclic gearing, have planetary gear and
The internal gear engaged with the planetary gear, wherein the internal gear has the biggish part 1 of radial thickness and radial thickness
Less than the part 2 of the part 1, and there is the axial slot for being formed in the internal gear, the slot is in the part 2
Radial depth is greater than the slot in the radial depth of the part 1, alternatively, a kind of epicyclic gearing, have planetary gear,
And the internal gear engaged with the planetary gear, wherein the internal gear has the slot being formed in the axial direction of the internal gear, described
Slot is greater than radial depth of the slot in axial central portion in the radial depth of axial end portion.
In the present invention, processing is scraped in the internal gear formation slot of epicyclic gearing by revolving.It therefore, can be with lower
Cost manufactures internal gear, and then can obtain the lower epicyclic gearing of cost.
According to the present invention, in epicyclic gearing, internal gear can be manufactured with lower cost.
Detailed description of the invention
Fig. 1 is the eccentric pendulum for indicating to apply the manufacturing method of internal gear involved in an example of embodiments of the present invention
The integrally-built cross-sectional view of ejector half deceleration device.
Fig. 2 is the cross-sectional view for indicating the internal tooth wheel body and cotter way of the internal gear of above-mentioned eccentric oscillating-type deceleration device, packet
Include the cross-sectional view of major part amplification profile.
Fig. 3 is the major part enlarged cross-sectional view from the direction of the arrow III of Fig. 2.
Fig. 4 is the state for indicating that strengthening part is made to be embedded in internal tooth wheel body involved in another embodiment of the present invention
Cross-sectional view.
Fig. 5 is the perspective view for indicating another structural example of strengthening part.
It is the knot that Fig. 6 (A), which is the main view for indicating structural example involved in another embodiment of the invention, Fig. 6 (B),
The side view including cross-sectional view of structure example.
Fig. 7 is the cross-sectional view for indicating structural example involved in another embodiment of the invention
Fig. 8 (A) is the major part enlarged cross-sectional view of Fig. 7, and Fig. 8 (B) is VIIIB-VIIIB shown in arrow along Fig. 8 (A)
The cross-sectional view of line.
In figure: G- eccentric oscillating-type deceleration device (epicyclic gearing), 12- input shaft, 18- eccentric part, 20- crankshaft,
24- external gear (planetary gear), 30- internal gear, 32- internal tooth wheel body, 32C- axle center, the shaft end 32E- portion, 34- cotter way,
36- export trade (pin member), 44- output shaft, the 1st strengthening part of 70-.
Specific embodiment
Hereinafter, with reference to the accompanying drawings, an example of embodiments of the present invention is described in detail.
Firstly, with reference to Fig. 1, to the manufacturing method for applying internal gear involved in an example of embodiments of the present invention
The overall structure of eccentric oscillating-type deceleration device (epicyclic gearing) is illustrated.
The input shaft 12 and the motor drive shaft 14A of motor 14 of eccentric oscillating-type deceleration device G is integrally formed.In input shaft 12
The crankshaft 20 with 2 eccentric parts 18 is linked with via key 16.
The axle center O1 that axle center O2, O3 of eccentric part 18 are respectively relative to input shaft 12 is eccentric.In this example embodiment, eccentric part 18
Eccentric phase difference be 180 degree.Roller bearing 22 is configured in the periphery of eccentric part 18.It is swingable in the periphery of roller bearing 22
Ground is assembled with 2 external gears (planetary gear) 24.2 external gears 24 having in the axial direction side by side are in order to ensure required biography
It passs capacity and improves spin balancing.External gear 24 respectively with 30 internal messing of internal gear.That is, eccentric oscillating-type deceleration device G
Radial center (the axle center O1 and internal gear 30 with input shaft 12 of device are configured at for the crankshaft 20 for swinging external gear 24
Axle center O1 it is coaxial) be referred to as " centre-crank formula " eccentric oscillating-type deceleration device.
Internal gear 30 has the internal tooth wheel body 32 being integrally formed with shell 28 (aftermentioned housing main body 52), along axial direction
It is formed in the cotter way (slot for being formed in internal gear) 34 of the internal tooth wheel body 32 and is configured at the export trade (pin member) of the cotter way 34
36.The internal tooth of the composition internal gear 30 of export trade 36.The internal tooth quantity (quantity of export trade 36) of internal gear 30 is than the external tooth of external gear 24
Quantity it is slightly more (in this example embodiment only more 1).Structure and its manufacturing method for internal gear 30 carry out specifically below
It is bright.
Multiple through hole 24A are formed with from the position of its axle center deviation (identical as axle center O2, O3) in external gear 24.It should
Domestic 40 are embedded in through hole 24A.Domestic 40 are pressed into and are fixed on configuration in the body flange of the axial side of external gear 24
In 42 domestic retaining hole 42A.Body flange 42 is integrally formed with output shaft 44.Output shaft 44 is by a pair of of tapered roller bearing 46
It holds.
In addition, in this embodiment, it is outer on domestic 40 to be used as sliding promoting member embedded with interior roller 48.In interior roller 48 and outside
The gap for 2 times of sizes for ensuring to have the eccentricity for being equivalent to eccentric part 18 between the inner peripheral surface of the through hole 24A of gear 24.It is domestic
40 (and interior rollers 48) run through external gear 24, therefore with the rotation of the external gear 24 synchronize acted.
On the other hand, the shell 28 of eccentric oscillating-type deceleration device G includes the housing main body for accommodating deceleration mechanism part 50
52；And accommodate the output outer housing 54 of output shaft 44.Load reverse side in the axial direction of housing main body 52, which is configured with, (also to be played
Motor cover function) load reverse side cover 56, the load-side in the axial direction of output outer housing 54 is configured with load side cover 57.Partially
Heart oscillating-type deceleration device G via the bolt hole 58A of foot 58 and is fixed in fixation member by bolt (not shown).
The internal tooth wheel body 32 of internal gear 30 is integrally formed with housing main body 52.That is, internal tooth wheel body 32 and housing main body
52 be identical component.For convenience, it is referred to as internal tooth wheel body 32 in the present specification.Exist for the structure of internal gear 30
Followed by detailed description.
The eccentric oscillating-type deceleration device G has above structure, by rotating the motor drive shaft 14A of motor 14, make with it is defeated
Enter 2 eccentric parts 18 rotation of the crankshaft 20 of the connection of axis 12.In this way, (have while external gear 24 is swung with internal gear 30
It is the export trade 36 for constituting the internal tooth of the internal gear 30 for body) engagement.As a result, whenever the rotation of input shaft 12 1 is enclosed and external gear 24
When swinging 1 time, 24 rotation of external gear and the teeth number difference (poor 1 tooth in this example embodiment) of internal gear 30 and external gear 24 are comparable
Amount.As a result, it is possible to which the rotation ingredient is transmitted to body flange 42 via domestic 40 and interior roller 48, to make and the body flange 42
The output shaft 44 being integrally formed is rotated in deceleration.
Then, the structure near internal gear 30 is described in detail.
Fig. 2 be include major part amplification profile internal tooth wheel body 32 cross-sectional view.Also, Fig. 3 is the arrow from Fig. 2
The major part enlarged cross-sectional view of the direction III observation.
As described above, internal gear 30 includes internal tooth wheel body 32；It is axially formed in the cotter way of the internal tooth wheel body 32
(slot for being formed in internal gear) 34；And it is configured at the cotter way 34 and constitutes the export trade (pin member) 36 of internal tooth.Internal tooth wheel body 32
Entirety be made of substantially a ring-shaped component.It is formed in the axial sides portion of interior gear body 32 opposite with loading for constituting
The stage portion 32A of latch portion between side cover 56 and stage portion for constituting the latch portion between output shaft outer housing 54
32B.That is, there is the internal gear 30 the biggish axle center of radial thickness (part 1) 32C and radial thickness to be less than in the axis
Shaft end portion (part 2) 32E1,32E2 of the radial thickness of centre portion 32C.
In addition, radial thickness here refers to that (the internal gear raw material before processing are scraped in rotation for the thickness of internal tooth wheel body 32
Inner peripheral surface to outer peripheral surface radial thickness).In the present embodiment, the inner peripheral surface of the part of cotter way 34 is not formed to outer peripheral surface
Radial distance be equivalent to radial thickness.In addition, in the present embodiment, due to the inner peripheral surface and outer peripheral surface of internal tooth wheel body 32
It is parallel with axis, therefore the outer diameter of the concept of the size of radial thickness and internal tooth wheel body 32 is (in this example embodiment, in axle center
32C is d32C, 32E1,32E2 d32E1, d32E2 in shaft end portion) size concept it is consistent.
In this embodiment, the radial thickness of axle center 32C is W32C, the radial thickness of shaft end portion 32E1,32E2
For W32E1, W32E2, and W32C > W32E1=W32E2.In addition, hereinafter, shaft end portion 32E1,32E2 are only called axis sometimes
Radial thickness W32E1, W32E2 are only called W32E by end 32E.
In the inner circumferential of interior gear body 32, it is formed with the tooth with internal tooth throughout axial whole length at equal intervals in the circumferential
The cotter way 34 of the identical quantity of number.In export trade (pin member) 36 of the cotter way 34 configured with the internal tooth for constituting internal gear 30.Cotter way 34 is
Square with the axis section is the slot of substantially semi-circular shape, and export trade 36 is rotatably freely configured at the cotter way in a manner of clearance fit
34。
In addition, the symbol 35 in Fig. 2, Fig. 3 is O-ring slot, 32B1 is the corner portion of stage portion 32B, and 32F is for that will bear
It carries opposite side cover 56 and exports the bolt hole that outer housing 54 is connected to internal tooth wheel body 32.
Hereinafter, the structure of the cotter way 34 is described in detail together with the explanation of 34 manufacturing method of cotter way.
In this embodiment, cotter way 34 is scraped processing by rotation and is formed.In the present embodiment, rotation is scraped processing and is referred to
" so that tool (skiving cutter) and workpiece (internal tooth wheel body 32) is kept certain angle and is rotated (such as synchronous rotary), and pass through institute
The speed difference of generation and the processing method transformed into ".
When by revolving the cotter way 34 for scraping the internal tooth wheel body 32 that processing is formed in present embodiment, such as by Japanese real
The processing equipment documented by Model Registration the 3181136th suitably carries out the processing of cotter way 34 involved in present embodiment
Required improvement (specifically, tool is modified to being capable of Machining Arc shape), so as to utilize the processing equipment.
The cotter way 34 of eccentric oscillating-type deceleration device G has at least one of following 2 structures (A) and structure (B)
(in this example embodiment there are two tool).
Structure (A), the radial depth of the cotter way 34 of " after process finishing is scraped in rotation " in (as part 2) shaft end portion 32E
G34e is greater than cotter way 34 in the radial depth G34c of (as part 1) axle center 32C.
Structure (B), the radial depth of the cotter way 34 of " after process finishing is scraped in rotation " in (as axial end portion) shaft end portion 32E
G34e is greater than cotter way 34 in the radial depth G34c of (as axial central portion) axle center 32C.
In structure (A), (B), " radial depth " refers to the interior of the part that cotter way 34 is not formed of internal tooth wheel body 32
Week is to the radial dimension between the bottom 34B of cotter way 34.Also, why be " radial depth after process finishing is scraped in rotation " be because
For, as be described hereinafter, if scraping the cotter way 34 that processing forms the internal tooth wheel body 32 of eccentric oscillating-type deceleration device G by rotation, for
Processing and to " the setting chipping allowance " of processing equipment setting with based on the practical cotter way 34 being cut of the setting chipping allowance
" (reality) chipping allowance " may be different." radial depth after process finishing is scraped in rotation " refers to " state being actually cut
Radial depth ".
The reasons why having this structure (A), (B) mainly has 2.
One is, " being formed in the slot on the internal gear of epicyclic gearing " is the cotter way of eccentric oscillating-type deceleration device G
Reason specific to 34 this structure, the other is, the specific reason of processing is scraped in rotation.
" being formed in the slot on the internal gear of epicyclic gearing " is this of the cotter way 34 of eccentric oscillating-type deceleration device G
Reason specific to structure is as follows.
Previous cotter way processing method, such as there is a problem of that processing cost is high in wire pulling method or Gear Shaping.Also,
When carrying out so-called running in, it need to ensure the longer running in time, there are problems that manufacturing cost is easily got higher.Its
In, running in refers to the operation carried out before originally as the operation of eccentric oscillating-type deceleration device G.By carrying out running-in
Operating can merge engaging for external gear 24 and internal gear 30, so that making to rotate becomes smooth, and further increase operation
Efficiency.For eccentric oscillating-type deceleration device G, operational efficiency has the property that the time with running in and rises,
And climbing is gradually reduced and will not rise again after reaching specified value.In order to ensure operational efficiency, sometimes delivery when or
Person carries out running in after stocking up, but then becomes project the time required to shortening running in as far as possible.
In eccentric oscillating-type deceleration device G, the radial depth of cotter way 34 is not purposely set as identical, but is adopted
With at least one of above structure (A) and structure (B) (being in this example embodiment two), and cotter way 34 and export trade 36 it
Between be partially formed gap.
Thereby, it is possible to further increase the smoothness of the rotation of export trade 36.And it is possible to which the gap is used as lubricant
Introduction part or maintaining part, so as to further increase the lubricity between cotter way 34 and export trade 36.
Then, another reason is to use the rotation of at least one of structure (A) and structure (B) (for two in the example)
It is as follows to scrape the specific reason of processing.
To be purposely set as the radial depth of cotter way unevenly using the processing method of previous cotter way, then in addition
Other manufacturing procedures for this are needed, this leads to the increase of cost.For this point, same processing equipment can be utilized
The rotation for being continuously formed the non-uniform radial depth of cotter way 34 scrapes processing in terms of cost advantageously.Processing can also be shortened
Time.
However, rotation, which is scraped in processing, is applied with biggish radial load from the inside gear body 32 of tool side when there is processing
Problem.That is, the internal tooth wheel body 32 of eccentric oscillating-type deceleration device G have radial thickness relative to outer diameter than it is relatively thin (even if
The maximum axle center 32C of thickness, the radial thickness relative to outside diameter d 32C are also W32C), and axial width L32 is biggish
Tendency.In particular, such as the embodiment, the tendency is arranged side by side in the eccentric oscillating-type deceleration device G for having multi-disc external gear 24 more
By force.
Therefore, when carrying out rotation and scraping processing, if radial load is applied to the axial of internal tooth wheel body 32 from radially inner side
Part, then internal tooth wheel body 32 is easy to radial outside flexible deformation.This is indicated: internal tooth wheel body 32 is from bullet when process finishing
Property deformation state restore in the case where, as a result, rotation scrapes the radial depth of the cotter way 34 after process finishing in shaft end portion 32E
Place is less than (being shallower than) at axle center 32C.
In the internal gear 30 of eccentric oscillating-type deceleration device G, if the radial depth of cotter way 34 becomes smaller, sold in the part
Slot 34 and export trade 36 contact unevenness, and smoothly rotation, the sliding of export trade 36 are hindered.Also, since export trade 36 is to external gear
24 sides are prominent, therefore it is also hindered with smoothly engaging for external gear 24.
In short, compared with the biggish axle center 32C (part 1) (with a higher rigidity) of radial thickness W32C, in radial direction
In lesser (rigidity is lower) the shaft end portion 32E (part 2) of thickness W32E, becomes apparent and the flexible deformation occur.Also,
Compared at axle center (axial central portion) 32C of cotter way 34, become apparent at shaft end portion (axial end portion) 32E of cotter way 34
The flexible deformation occurs for ground.
Therefore, in eccentric oscillating-type deceleration device G, the situation and using the above structure (A) and structure are reversely utilized
(B).That is, if being set as the setting chipping allowance of lesser (rigidity the is lower) part 2 of radial thickness W32E to compare radial thickness
The setting chipping allowance of the biggish part 1 (with a higher rigidity) of W32C greatly go out more than above-mentioned flexible deformation amount, then as a result,
Above structure (A) can be realized after process finishing is scraped in rotation.
If also, the setting chipping allowance in more easily-deformable shaft end portion is set as than on less easily-deformable axle center
Setting chipping allowance greatly go out more than above-mentioned flexible deformation amount, then as a result, it is possible to after process finishing is scraped in rotation realize on
State structure (B).
Above structure (A) and structure (B) will not necessarily use simultaneously, only with it is therein any one can also obtain
Corresponding effect.
Also, processing is scraped according to rotation, in order to realize the inhomogeneities of this radial depth, is added without being additionally carried out other
Work only passes through the setting of change chipping allowance, it will be able to which realization is carried out continuously desired (uneven using same processing equipment
It is even) processing of radial depth.
More specific description is carried out referring again to the structure of Fig. 2, Fig. 3, the cotter way 34 after process finishing is scraped to rotation.
In the present embodiment, the lesser part 2 of radial thickness W32E (is in this example embodiment the pin in shaft end portion 32E)
The radial depth G34e of slot 34 is greater than the pin in the biggish part 1 of radial thickness W32C (being axle center 32C in the example)
The radial depth G34c (G34e > G34c: above structure (A)) of slot 34.
The structure can be accomplished in that by the setting as the cotter way 34 of the shaft end portion 32E of part 2 cutting more than
The setting chipping allowance that amount is set as the slot than the axle center 32C as part 1 goes out greatly the shadow of flexible deformation when than that will process
Ring the bigger amount of the amount offset.That is, if the setting chipping allowance on each position of shaft end portion 32E is set as X, it will be in axis center
Setting chipping allowance on portion 32C is set as Y, the elastic deformation amount on each position of shaft end portion 32E when processing is set as H, then
It is set as X=Y+H+ α.In the present embodiment, so that the radial depth of the cotter way 34 after process finishing is with outside towards axis
Side and the mode being gradually increased sets " α ".
In addition, the radial depth G34e as the cotter way 34 of the shaft end portion 32E of part 2 is set as big in this way
It when the radial thickness G34c of the cotter way 34 of the axle center 32C as part 1, is preferably set to as follows: as shown in Fig. 2, will
The axial range L34Sd of chipping allowance major part is set greater than the lesser part 2 of radial thickness W32E (shaft end portion 32E)
Axial range L32B.This is because since the flexible deformation that radial thickness W32E is smaller and generates will not occur suddenly in diameter
The axial position to change to thickness.Thereby, it is possible to further suitably counteract the influence of flexible deformation, and realize
Above structure (A).
Also, in the present embodiment, (independently from the size with the radial thickness of internal tooth wheel body 32) shaft end portion 32E
Radial depth G34c (the G34e > G34c: above structure of cotter way 34 of the radial depth G34e of cotter way 34 greater than axle center 32C
(B)).The structure is realized also by such as under type: the radial setting chipping allowance of the cotter way 34 of shaft end portion 32E is set as comparing
The amount that the influence that the radial setting chipping allowance of the cotter way 34 of axle center 32C goes out greatly flexible deformation when than that will process is offset is more
Big amount.
In addition, the radial chipping allowance (radial depth G34e) of the cotter way 34 of shaft end portion 32E is set in this way
For the cotter way 34 greater than axle center 32C radial chipping allowance (radial depth G34c) when, be preferably set to as follows: such as Fig. 2
It is shown, make the radial chipping allowance (radial depth G34e) of the shaft end portion 32E of the cotter way 34 towards the shaft end portion side 32E gradually
Increase.The structure, which considers elastic deformation amount, to be had the tendency that further increase with towards axis end side.Thereby, it is possible to
The influence for further suitably offsetting flexible deformation, and realizes above structure (B), and can make cotter way 34 and export trade 36 it
Between contact become more smooth.
In addition, in this embodiment, above structure (A) (or structure (B)) is involved as shown in the amplification circle inside of Fig. 2
And radial depth formation line 34Sd be set as in axially curve-like increase, and simultaneously non-linear shape increase.Shaft end portion 32E's
The maximum value of radial depth G34e is G34e1 at the 34B1 of axial end position, and at the 34B1 of the axial end position and export trade
Ensure there is gap delta 34 between 36.
The function and effect of eccentric oscillating-type deceleration device G as the embodiment, or the system as its internal gear
The function and effect for making method are as follows.
(I) can be such that generated gap delta 34 functions as the importing access or maintaining part of lubricant, so as to
Enough improve operational efficiency.
(II) can be improved the smooth rotation of export trade 36.
(III) when being applied with stronger load, export trade 36 can be bent.As a result, it is possible to inhibit cotter way 34 and export trade
The field of conjugate action degree of pressing through of contact portion between 36 and export trade 36 and external gear 24 rises, and can take into account sideshake reduction and
Engage the reduction (it is of course also possible to being set as more focusing on the design of any one) of face pressure.
(IV) can shorten process time and running in time than in the past.
(V) scrapes processing by rotation, can be formed continuously radial depth pin different in the axial direction using same processing equipment
Slot, and process time can be shortened, to reduce processing cost.
In addition, (adding although labor content is scraped than rotation when being conceived to the function and effect of above-mentioned " non-uniform radial depth "
Work is more) combination of combination, such as gear shapping machine and the abrasive machine of processing equipment other than processing equipment can be scraped for example, by revolving
Etc. realizing the non-uniform radial depth.
On the contrary, if be conceived to " the influence bring unfavorable condition that elimination carries out flexible deformation when processing is scraped in rotation " this
Point, then carrying out setting chipping allowance when processing is scraped in rotation will not necessarily be set as going out greatly than supporting the influence of flexible deformation when processing
The bigger amount of the amount to disappear.For example, it is also possible to be set as going out the amount for just offsetting the influence of flexible deformation when processing greatly.Lead to as a result,
Overwinding scrapes processing, and radial depth non-uniform cotter way is formed while capable of processing to the cotter way of internal gear.
In addition, in this case, because of certain reasons such as deviation, finally can not accurately be formed uniformly the depth of cotter way
Even.This is because even if finally can not correctly be formed uniformly the depth of cotter way, in axial whole region to setting
Chipping allowance does not set any difference and scrapes the manufacture that cotter way is processed in processing using rotation and compare, due to having differences,
At least certain effect can centainly be obtained.
In short, from based on rotation scrape processing eccentric oscillating-type deceleration device internal gear (cotter way) manufacturing method this
From the point of view of one viewpoint, the radial direction of the part 1 greater than cotter way is set as by the radial setting chipping allowance by the part 2 of cotter way
Setting chipping allowance, can obtain following advantage, that is, inhibit the difference of rigidity generated by the radial thickness of internal tooth wheel body
The influence of different bring flexible deformation.
Similarly, by the way that the radial setting chipping allowance of the axial end portion of cotter way to be set as to the axial center greater than cotter way
The radial setting cutting output in portion can obtain following advantage, that is, inhibit axial end portion and axial center because of internal tooth wheel body
The influence of the difference bring flexible deformation of the rigidity in portion.
Moreover, be based on for (cotter way) manufacture for the internal gear for revolving the eccentric oscillating-type deceleration device for scraping processing, from
It is " outside in the diameter for making strengthening part be embedded in part 2 from the point of view of reducing this viewpoint of the influence of flexible deformation of internal tooth wheel body
In the state of side, to cotter way carry out rotation scrape processing " method or " in the diameter for the axial end portion for making reinforcer be embedded in cotter way
In the state of outward, to cotter way carry out rotation scrape processing " method it is effective.As a result, due to the flexible deformation of internal tooth wheel body
It can almost be suppressed, therefore between cotter way and export trade in the case where formation gap or in the case where being not provided with gap,
Processing can be scraped to manage rotation with higher accuracy to size.
Situation is shown below in Fig. 4: as the example for keeping strengthening part chimeric, when internal tooth wheel body 32 has radial thickness
W32C biggish axle center (part 1) 32C and radial thickness W32E (W32E1, W32E2) are less than axle center 32C's
When shaft end portion (part 2) 32E, so that the state that the 1st strengthening part 70 is embedded in the outside of shaft end portion 32E carries out cotter way 34
Processing is scraped in rotation.
Specifically, showing in Fig. 4 makes cricoid 1st strengthening part 70 be embedded in internal tooth wheel body respectively from axial sides
The example of 32 stage portion 32A, 32B.It is preferred that the inner circumferential 70A of the 1st strengthening part 70 is slightly in interference fit with stage portion 32A, 32B
Internal diameter D70A then can obtain corresponding effect not being to be interference fitted but as long as not being clearance fit.In addition, the 1st
The outside diameter d 70 of strengthening part 70 is set as the outside diameter d 32C of the axle center 32C of slightly larger than internal tooth wheel body 32 in this example embodiment,
So as to be locked to fixture (not shown) in disassembly.
In addition, if for example shown in fig. 5 2nd can also be used when being difficult to install and dismantle in the case where interference fit
Strengthening part 84 is used as strengthening part, and the 2nd strengthening part has the knot that fastening force is adjusted by bolt 80 and nut 82
Structure.By using the Tightening moment that can manage bolt 80 and nut 82 (for example, reaching set Tightening moment when progress
Idle running) bolt 80 is anchored on nut 82 by driver, so as to reduce gap delta 84, it is ensured that based on the 2nd strengthening part 84 can
The fastening force of reproduction.Also, in the structure, the installation and disassembly of the 2nd strengthening part 84 are easier to.
By the reinforcement of the 1st strengthening part 70 or the 2nd strengthening part 84, shaft end portion (part 2) 32E can obtain with
Axle center (part 1) 32C is identical or rigidity more than it.The radial direction of machining tool is scraped thereby, it is possible to fully bear rotation
Load, even and if for example in the case where being processed with being set as identical chipping allowance throughout axial whole region,
Also it is capable of forming the uniform cotter way 34 of radial depth.
In addition, it is also contemplated that being conceived to the method for axial end portion in the method for configuration strengthening part.That is, " (with internal tooth
The radial thickness of wheel body is independently) in the state of making strengthening part be embedded in the axial end portion of cotter way, cotter way is added
The method of work ".Even if the radial thickness of internal tooth wheel body is uniformly or the radial thickness of axial end portion is larger, since flexible deformation is bright
It is apparent in axial end portion aobviously, therefore it is effective for reinforcing axial end portion.
The example of another embodiment of the present invention is shown in Fig. 6 (A) and Fig. 6 (B).Such as above embodiment institute
It states, in eccentric oscillating-type deceleration device G other than being fixed on the type of fixation member via foot 58, there are also via flange part
It is fixed on the type of fixation member.In the example of Fig. 6 (A) and Fig. 6 (B), flange part 90F is formed in internal tooth wheel body 90
The shaft end portion 90E1 of axial side.
That is, the internal tooth wheel body 90 only has the biggish flange part of radial thickness W90F in the shaft end portion 90E1 of axial side
(part 1) 90F, and have radial thickness W90H less than the radial thickness of the shaft end portion 90E1 of the side in end side
Flat peripheral part (part 2) 90H.
In the example of Fig. 6 (A) and Fig. 6 (B), the 3rd strengthening part 93 is made to be embedded in radial thickness W90H less than flange part
Flat peripheral part (part 2) 90H of (part 1) 90F.In addition, in this example embodiment, the 3rd strengthening part 93 is using by inserting
The structure for being through at the bolt 94 in bolt hole 91B, 92B of flange part 91A, 92A of 2 intensive aspects 91,92 to fasten, link.
In this way, the specific structure of strengthening part can also be suitably designed according to the specific shape of internal tooth wheel body.
In addition, the structural example of the Fig. 6 (A) and Fig. 6 (B) are also considered as if being conceived to the shaft end portion 90E2 of the other side
The 3rd strengthening part 93 is set to be embedded in the structural example of the shaft end portion 90E2 of internal tooth wheel body 90.However, due in Fig. 6 (A) and Fig. 6
(B) the shaft end portion 90E1 of the side of structural example is configured with the great flange part 90F of radial thickness, therefore adds without being specially fitted into
Strong component.
Also, it is also that radial thickness W90H is lesser as the another of part 2 in the example of Fig. 6 (A) and Fig. 6 (B)
The line 96Sd that the radial depth G96e2 of the cotter way 96 of the shaft end portion 90E2 of side is set as radially depth is greater than as part 1
Axial side shaft end portion 90E1 radial depth G96e1.
Moreover, the radial depth G96e2 of the shaft end portion 90E2 of the other side is set as in the example of Fig. 6 (A) and Fig. 6 (B)
Radial depth G96c greater than axle center 96C.
It, can be with high accuracy pair by the multiplication effect of these effects in the example of Fig. 6 (A) and Fig. 6 (B)
The cotter way 96 of internal tooth wheel body 90 realizes structure corresponding with above structure (A) and structure (B).
In addition, in the above-described embodiment, being externally embedded to interior roller as sliding promoting member domestic.It it is known that with as follows
The eccentric oscillating-type deceleration device of internal gear: shown internal gear is configured to, similarly outer to export trade to promote embedded with outer roller as sliding
Into component.At this point, forming the cotter way for configuring the export trade in interior gear body.The present invention is in addition to being suitable for configuring above-mentioned export trade (pin
Component) cotter way other than, be equally applicable to configure the cotter way of this outer roller.
Also, in the above-described embodiment, as eccentric oscillating-type deceleration device, the radial center tool in device is instantiated
The eccentric oscillating-type deceleration device of " the centre-crank formula " of standby 1 crankshaft.However, as eccentric oscillating-type deceleration device, also
Knowing has the following eccentric oscillating-type deceleration device referred to as " distribution formula ": having multiple songs in the position in the axle center far from device
Axis, and external gear is swung by making multiple crankshaft-synchronous rotation.Slow down in the eccentric oscillating-type of this distribution formula and fills
In setting, as long as internal gear is configured to have internal tooth wheel body, be formed in the cotter way of the internal tooth wheel body and be configured at the cotter way
Pin member can similarly be applicable in the present invention.
Moreover, applicable object of the invention is not necessarily limited to the internal gear of eccentric oscillating-type deceleration device, for example,
It may be equally applicable for the planetary gears internal gear such as simple planetary gear device.
Its an example is shown in Fig. 7 and Fig. 8 (A), Fig. 8 (B).Fig. 8 (A) is the major part enlarged cross-sectional view of Fig. 7, Fig. 8
(B) be VIIIB-VIIIB line shown in arrow along Fig. 8 (A) cross-sectional view.
The epicyclic reduction gear unit 110 has simple planetary gear device (the 1st epicyclic gearing 111, of two-stage
2 epicyclic gearing 112).As the component for constituting shell 120, epicyclic reduction gear unit 110 has the 1st row of main receiving
1st outer housing 121 of star gear device 111, main the 2nd outer housing 122 for accommodating the 2nd epicyclic gearing 112 and double as horse
Up to the relaying outer housing 123 of cover.1st outer housing 121, the 2nd outer housing 122 and relaying outer housing 123 are linked by bolt 124.
About the structure of shell 120, can be spoken of below.
1st epicyclic gearing 111 includes the input shaft rotated integrally via relay axis 140 and motor drive shaft (not shown)
142；It is formed in the sun gear 144 of the input shaft 142；With 144 external toothing of sun gear and it is supported in the row of wheel carrier 146
Star gear 148；And the internal gear 150 of 148 internal messing of planetary gear.The present invention is suitable for the interior of the 1st epicyclic gearing 111
Gear 150.
The internal gear 150 of 1st epicyclic gearing 111 is integrally formed with the 1st outer housing 121.The internal tooth of internal gear 150
152 (not passing through export trade) are formed directly into the 1st outer housing 121.In this embodiment, it is formed in the internal gear 150
Tooth socket 151 between internal tooth 152 and internal tooth 152 is scraped processing by rotation and is formed.Day above-mentioned can be used as processing equipment
The utility model registers documented processing equipment in No. 3181136.
1st outer housing 121 (internal gear 150) has annular recessed portion 121A circumferentially in relaying 123 side of outer housing.Relaying
Outer housing 123 has the annular convex 123A chimeric with recess portion 121A in axial 121 side of the 1st outer housing.The relaying shell
The inner peripheral surface 121B of the radial outside of the recess portion 121A of the outer peripheral surface 123B and the 1st outer housing 121 of the protrusion 123A of body 123 is constituted
Relay the lock face of outer housing 123 and the 1st outer housing 121.Also, the inner peripheral surface of the protrusion 123A in relaying outer housing 123
Ensure to have gap delta between the outer peripheral surface 121C of the radially inner side of the recess portion 121A of 123C and the 1st outer housing 121.
Also, the 1st outer housing 121 has circular step face 121S circumferentially in axial 122 side of the 2nd outer housing.2nd
The end of axial 121 side of the 1st outer housing of outer housing 122 is chimeric with step surface 121S lock.
Here, verify in the embodiment " (the interior of the internal gear raw material before processing is scraped in rotation for the radial thickness of internal gear
Circumferential surface to outer peripheral surface radial thickness) ".
In this example embodiment, " inner peripheral surface that the internal gear raw material before processing are scraped in rotation " is that 151 part of tooth socket is not formed
Inner peripheral surface (outside circle of internal tooth 152) 150T, shares in the axial direction.
On the other hand, such as the embodiment, the internal gear raw material before processing is scraped in rotation have recess portion 121A or step surface
When 121S, " radial thickness of internal gear " should be that can aid in rigid radial thickness.In other words, " the radial direction of internal gear
Thickness " should be " rotation scrape processing before internal gear raw material inner peripheral surface on same axial position near the inner peripheral surface
The radial thickness of outer peripheral surface "
In this way, which in this example embodiment, " outer peripheral surface that the internal gear raw material before processing are scraped in rotation " is in axle center 150C
As the most peripheral 150P of internal gear 150, the shaft end portion 150E1 in relaying 123 side of outer housing is inside as the diameter of recess portion 121A
The outer peripheral surface 121C of side, the shaft end portion 150E2 in 122 side of the 2nd outer housing become step surface 121S.
Therefore, the internal gear 150 of the 1st epicyclic gearing 111 includes the biggish axle center of radial thickness W150C
(part 1) 150C；And radial thickness W150E1, W150E2 are less than the shaft end portion (part 2) of axle center 150C
150E1、150E2。
Also, in this embodiment, shaft end portion (the shaft end portion of relaying 123 side of outer housing) 150E1's is radial thick
Degree W150E1 is smaller than the radial thickness W150E2 of another shaft end portion (shaft end portion of 122 side of the 2nd outer housing) 150E2 (can also
Shaft end portion 150E2 is interpreted as part 1, shaft end portion 150E1 is interpreted as part 2).
In the internal gear 150 of the 1st epicyclic gearing 111 with this structure, also it can be considered that processing spy is scraped in rotation
The reasons why having and at least one of structure (A) and structure (B) before using (in this example embodiment using two).
Specifically, by the radial direction of the 122 side axle end 150E2 of the 2nd outer housing of (radial thickness is lesser) tooth socket 151
Chipping allowance is set greater than the radial cutting surplus of the axle center 150C of (radial thickness is biggish) tooth socket 151.Moreover, will
The radial chipping allowance of the 123 side axle end 150E1 of relaying outer housing of the smaller tooth socket 151 of radial thickness is set as being even larger than
The radial chipping allowance of 2nd outer housing, 122 side axle end 150E2.
Thereby, it is possible to be further reduced rotation to scrape the distinctive unfavorable condition of processing, i.e. the actual cut surplus in shaft end portion is less than
It is larger that the actual cut surplus of the radial thickness smaller portions of the unfavorable condition or internal gear of axle center is less than radial thickness
Partial unfavorable condition.
Though also, do not illustrate in detail, it in this embodiment can also be by relaying 123 side of outer housing of tooth socket 151
The axial range of chipping allowance major part is set greater than the axial range of relaying 123 side axle end 150E1 of outer housing.And
And the axial range of the chipping allowance major part of 122 side of the 2nd outer housing of tooth socket 151 can also be set greater than tooth socket
The axial range of 151 122 side axle end 150E2 of the 2nd outer housing.
Also, the radial chipping allowance in the 123 side axle end 150E1 of relaying outer housing of tooth socket 151 can also be set
It is set to towards axial end portion side (relaying 123 side of outer housing) and is gradually increased.Also, it can also be by the 2nd outer housing of tooth socket 151
The radial chipping allowance of 122 side axle end 150E2 is set as being gradually increased towards axial end portion side (122 side of the 2nd outer housing).
By these structures, it can more swimmingly absorb, adjust the unfavorable condition generated by the difference of radial thickness.
Moreover, in this embodiment, such as strengthening part (not shown) can also to be embedded in radial thickness smaller
The radial outside of part 2 is (specifically, the outer peripheral surface 121C's of the radially inner side of the recess portion 121A of the 1st outer housing 121 is outer
Side, and/or, the outside of the step surface 121S of the 1st outer housing 121) in the state of to tooth socket 151 carry out rotation scrape processing.It can also be with
With chipping allowance is set as together with biggish method or is replaced that chipping allowance is set as biggish method, it is this chimeric to use
The method of strengthening part.
Claims (9)
1. a kind of manufacturing method of the internal gear of epicyclic gearing, the epicyclic gearing have planetary gear and with this
The internal gear of planetary gear engagement, the method is characterized in that,
Processing, which is scraped, by rotation forms slot in the internal gear,
The radial chipping allowance of the axial end portion of the slot is set greater than the radial of the axial central portion of the slot to cut
Surplus is cut, and the axial end portion of the slot and axial central portion are cut using same processing equipment.
2. a kind of manufacturing method of the internal gear of epicyclic gearing, the epicyclic gearing has a planetary gear, and with this
The internal gear of planetary gear engagement, the method is characterized in that,
Processing, which is scraped, by rotation forms slot in the internal gear,
The internal gear has part 1 and part 2, and the radial thickness of the part 2 is less than the radial thick of part 1
Degree,
The radial chipping allowance of the part 2 of the slot is set greater than the radial of the part 1 of the slot to cut
Surplus is cut, and is cut using part 1 and part 2 of the same processing equipment to the slot.
3. the manufacturing method of the internal gear of epicyclic gearing according to claim 1 or 2, which is characterized in that
The internal gear has internal tooth wheel body, is formed in the cotter way of the internal tooth wheel body, is configured at the pin member of the cotter way,
Processing, which is scraped, by the rotation forms the cotter way.
4. the manufacturing method of the internal gear of epicyclic gearing according to claim 1 or 2, which is characterized in that
Processing, which is scraped, by the rotation forms tooth socket between the internal tooth and internal tooth of the internal gear.
5. the manufacturing method of the internal gear of epicyclic gearing according to claim 2, which is characterized in that
It will be in the radial chipping allowance of the part 1 of the radial chipping allowance and the slot of the part 2 of the slot
The axial range of the biggish part of chipping allowance is set greater than the axial range of the part 2.
6. the manufacturing method of the internal gear of epicyclic gearing according to claim 2, which is characterized in that
In the state that the radial outside of the part 2 is fitted into strengthening part, rotation is carried out to the slot and scrapes processing.
7. the manufacturing method of the internal gear of epicyclic gearing according to claim 1, which is characterized in that
The radial chipping allowance of the axial end portion of the slot is set as being gradually increased towards the axial end portion side.
8. the manufacturing method of the internal gear of epicyclic gearing according to claim 1, which is characterized in that
In the state that the radial outside of the axial end portion of the slot is fitted into strengthening part, the slot is processed.
9. a kind of epicyclic gearing, with planetary gear and the internal gear engaged with the planetary gear, the planetary gear
Device is characterized in that,
The internal gear has part 1 and part 2, and has the axial slot for being formed in the internal gear,
Since the outer diameter of the part 2 is less than the outer diameter of the part 1, the radial thickness of the part 2 is less than described
The radial thickness of part 1,
The slot in the entire axial region of the part 2 of the slot is greater than described in the radial depth of the part 2
Radial depth of the slot in the part 1.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-268009 | 2013-12-25 | ||
| JP2013268009 | 2013-12-25 | ||
| JP2014-167926 | 2014-08-20 | ||
| JP2014167926A JP6275588B2 (en) | 2013-12-25 | 2014-08-20 | Planetary gear device and method for manufacturing the internal gear |
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| Publication Number | Publication Date |
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| CN104747657A CN104747657A (en) | 2015-07-01 |
| CN104747657B true CN104747657B (en) | 2019-04-23 |
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| CN201410620713.8A Active CN104747657B (en) | 2013-12-25 | 2014-11-05 | The manufacturing method of epicyclic gearing and its internal gear |
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| Country | Link |
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| JP (1) | JP6275588B2 (en) |
| CN (1) | CN104747657B (en) |
| DE (1) | DE102014016928A1 (en) |
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| JP6335006B2 (en) * | 2014-04-17 | 2018-05-30 | ナブテスコ株式会社 | Gear transmission |
| JP7450340B2 (en) * | 2019-04-09 | 2024-03-15 | 住友重機械工業株式会社 | Gear device, manufacturing method of gear device |
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| JP2015142956A (en) | 2015-08-06 |
| DE102014016928A1 (en) | 2015-06-25 |
| JP6275588B2 (en) | 2018-02-07 |
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