CN109139816A - Retarder - Google Patents
Retarder Download PDFInfo
- Publication number
- CN109139816A CN109139816A CN201810680077.6A CN201810680077A CN109139816A CN 109139816 A CN109139816 A CN 109139816A CN 201810680077 A CN201810680077 A CN 201810680077A CN 109139816 A CN109139816 A CN 109139816A
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- Prior art keywords
- thrust plate
- sun gear
- sun
- gear
- planetary
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- F16H1/46—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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
本发明提供能够利用简单的结构来限制太阳齿轮和多个行星齿轮的轴向位置的减速器。另外，提供一种缩短减速器整体的轴向长度而可紧凑地构成的减速器。借助连结构造部(40)与将多个第1行星齿轮(16)保持成旋转自如的多个支承轴(29)连结的止推板(18)以覆盖多个第1行星齿轮(16)和第1太阳齿轮(15)各自的至少一部分的方式设置。多个第1行星齿轮(16)、第1太阳齿轮(15)、多个支承轴(29)以及连结构造部(40)不从止推板18的面中的与多个第1行星齿轮(16)相对的面(18a)的相反侧的面(18b)突出。
The present invention provides a speed reducer capable of restricting the axial positions of a sun gear and a plurality of planetary gears with a simple structure. In addition, there is provided a speed reducer that can be configured compactly by shortening the entire axial length of the speed reducer. The plurality of first planetary gears (16) and the plurality of first planetary gears (16) and a plurality of first planetary gears (16) and The first sun gears (15) are provided so as to be at least a part of each. The plurality of first planetary gears (16), the first sun gear (15), the plurality of support shafts (29), and the connecting structure portion (40) are not connected to the plurality of first planetary gears ( 16) The surface (18b) on the opposite side of the opposing surface (18a) protrudes.
Description
Technical field
The present invention relates to the planetary gear mechanisms by having sun gear, multiple planetary gears and tooth rest to make input shaft
Rotation slow down, simultaneously to rotation shell carry out rotation driving retarder.
Background technique
Sun gear is utilized and planetary gear retarder is widely used.Such as patent document 1 and 2 is open a kind of
The retarder for having sun gear (sun gear), planetary gear, internal gear (ring gear) and tooth rest.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2005-054973 bulletin
Patent document 2: Japanese Unexamined Patent Publication 09-240525 bulletin
Summary of the invention
Problems to be solved by the invention
In having sun gear and planetary gear retarder, in order to constantly maintain sun gear and planetary gear it
Between engagement, need to limit sun gear and planetary gear axial position.
In such as retarder of patent document 1, planetary gear is fastened by washer and bolt relative to tooth rest, and too
Sphere is configured between positive gear and cover component.The sphere is to be embedded in the recessed of the cover component side end face of sun gear formation
Hole is configured with the state that both sun gear and cover component contact.In the retarder, planetary gear axial position quilt
Washer and bolt limitation, in addition, the axial position of sun gear is limited by sphere.
On the other hand, it in the retarder of patent document 2, is provided in the side in the end cover direction of rotation tooth rest
Hole is formed with the recess portion for configuring thrust plate in the hole.It is attached to the end face of the axis of the output shaft of hydraulic motor and is configured to
The thrust plate of the recess portion abuts, and the end of the axis is provided with sun gear.In the retarder, planetary gear axial position
It is limited by rotation tooth rest, in addition, the axial position of sun gear is limited by thrust plate.
The case where the axial position of sun gear is limited using sphere as the retarder of above-mentioned patent document 1
Under, it needs that sun gear and cover component are processed to form the pit etc. for accommodating sphere.In addition, in patent document 1
Retarder in, limit the mechanism of the mechanism of the axial position of sun gear and the axial position of restrictions planetary gear by independence
Ground setting, accordingly, there exist constructions to become complicated tendency.In addition, limiting sun gear in the retarder of patent document 2
The mechanism of the axial position of the mechanism and restrictions planetary gear of axial position is also set independently, and accordingly, there exist constructions to become
Complicated tendency, need to form hole portion for configuring the thrust plate limited the axial position of sun gear, recess portion.
In patent document 1 and the so disclosed retarder of patent document 2, in order to limit sun gear and planetary gear
Axial position, needs more components, and mechanism is easy to complicate.Especially, it in the retarder of patent document 1, needs
Prepare sphere and the sphere is simultaneously configured at predetermined position, therefore, also spends labour and time and the cost of assembling.In addition,
In the retarder of patent document 2, labour and time and the cost of assembling are not only spent, but also the area of thrust plate is smaller,
Therefore, due to thrust plate and sun gear sliding contact and generate heat thermal diffusivity it is also bad.
The present invention is made into view of above-mentioned situation, and the first purpose is that simple structure can be utilized by providing one kind
To limit the retarder of sun gear and multiple planetary gear axial positions.In addition, another object is to provide a kind of shortening
The axial length of retarder entirety and the retarder that can compactly constitute.
The solution to the problem
A form of the invention is related to a kind of retarder, which has: rotation shell is fixed shell by shell
Body is kept into bearing and is rotated freely centered on rotation axis；Internal tooth is set to the inner circumferential of rotation shell；Input shaft,
It is arranged to rotate freely, links with the driving source for generating rotary driving force；Sun gear links with input shaft；Multiple rows
Star gear, is configured between sun gear and internal tooth；Tooth rest includes base portion, in the axial direction that rotation axis extends
On be configured at multiple planetary gear sides；Multiple support shafts, it is prominent towards the other side from base portion in the axial direction from side,
Multiple planetary gears are kept into bearing respectively by gear and are rotated freely；Thrust plate is configured at multiple rows in the axial direction
The other side of star gear links by connection formations and multiple support shafts, and in the retarder, thrust plate is to cover multiple rows
Star gear and the respective at least part of mode of sun gear are arranged, multiple planetary gears, sun gear, multiple support shafts with
And connection formations is not prominent from the face of the opposite side in the face opposite with multiple planetary gears in the face of thrust plate.
It is also possible to sun gear and includes sun teeth portion；With sun supporting part, sun teeth portion, multiple planet teeth are supported
Wheel is respectively provided with: planet teeth portion is engaged with sun teeth portion；With planet supporting part, supporting planetary teeth portion, thrust plate and the sun
Supporting part contact, but do not contacted with sun teeth portion.
The end face for being also possible to the thrust plate side of sun supporting part is configured at thrust plate with multiple support shafts in the axial direction
The identical position in the end face of side is configured at the end face of thrust plate side than multiple support shafts away from thrust plate remote position, too
The end face of the thrust plate side of positive teeth portion is configured at the end face of the thrust plate side than multiple support shafts away from thrust plate farther out in the axial direction
Position.
Being also possible to thrust plate has towards sun supporting part plate protrusion outstanding, and plate protrusion is contacted with sun supporting part,
But it is not contacted with sun teeth portion.
The end face for being also possible to the thrust plate side of planet teeth portion is configured at thrust plate side than sun teeth portion in the axial direction
End face is away from thrust plate remote position.
It is also possible in input shaft and sun gear, one has the engaging protuberances of convex form, and it includes card that another one, which has,
Close space including engaging recessed part, by be configured to engaging space engaging protuberances engage with engaging recessed part, sun gear with it is defeated
Enter axis connection, sun gear is connected to input shaft, can be with input shaft on the axis direction of rotation centered on rotation axis
It integrally rotates, and can relatively be moved relative to input shaft in the axial direction.
The effect of invention
According to the present invention, according to the retarder of simple structure, can limit sun gear and multiple planetary gears this two
The axial position of person.In addition, in accordance with the invention it is possible to shortening the axial length of retarder entirety and compactly constituting retarder.
Detailed description of the invention
Fig. 1 is the cross-sectional view for indicating the planetary reducer of one embodiment of the present invention.
Fig. 2 is the top view for the appearance for indicating the 1st planetary gear, thrust plate and rotating shell.
Fig. 3 is to indicate the 1st planetary gear, thrust plate and the top view for rotating shell, indicates to be configured at perspective
Tooth rest (i.e. support shaft), the 1st planetary gear and the 1st sun gear of the lower section of thrust plate.
Fig. 4 is the skeleton diagram in the section of the linking portion from side between thrust plate shown in FIG. 1 and support shaft.
Fig. 5 is the cross-sectional view for indicating the outline of another example of the linking portion between thrust plate and support shaft.
Fig. 6 is the cross-sectional view for indicating the outline of another example of the linking portion between thrust plate and support shaft.
Fig. 7 is thrust plate, each support shaft of tooth rest and the section of the 1st sun gear shown in FIG. 1 from side
The skeleton diagram of state indicates the positional relationship of each element.
Fig. 8 is another example for indicating the positional relationship of thrust plate, each support shaft of tooth rest and the 1st sun gear
The schematic sectional view of son.
Fig. 9 is the schematic sectional view for indicating an example of the connection form between input shaft and the 1st sun gear.
Description of symbols
1, planetary reducer；10, hydraulic motor；11, fixed shell；12, shell is rotated；13, internal tooth；14, it inputs
Axis；15, the 1st sun gear；16, the 1st planetary gear；17, tooth rest；18, thrust plate；19, the 2nd sun gear；20, the 2nd row
Star gear；21, lid；22, press section；23, gear bearing；28, shell bearing；29, support shaft；30, flange part；31,
Protruding part；34, it is provided projectingly axle portion；35, base portion；40, link formations；45, sun teeth portion；46, sun supporting part；47,
Planet teeth portion；48, planet supporting part；50, plate protrusion；52, engaging protuberances；53, engaging recessed part；54, engage engaging section；55, block
Close space；60, recess portion；61, protrusion；62, hole portion；65, flat part；66, setting unit is erect；67, extension；68, screw division；
A, rotation axis；Da, axial direction；Dc, circumferential direction；Dr, radial direction.
Specific embodiment
Reference attached drawing is next, and embodiments of the present invention will be described.It is each shown in the drawings to want in addition, for easy understanding
The element that element can be indicated comprising size and contraction scale etc. with actual size and contraction scale difference.In addition, typical
For, planetary reducer described below can be used as the retarder in the traveling device that building machinery has, but its
Purposes is not particularly limited.
Fig. 1 is the cross-sectional view for indicating the planetary reducer 1 of one embodiment of the present invention.Fig. 2 is to indicate the 1st planet
The top view of the appearance of gear 16, thrust plate 18 and rotation shell 12.Fig. 3 be indicate the 1st planetary gear 16, thrust plate 18 with
And the top view of rotation shell 12,17 (the i.e. support shaft of tooth rest for the lower section for being configured at thrust plate 18 is indicated with perspective
29), the 1st planetary gear 16 and the 1st sun gear 15.
Planetary reducer 1 shown in FIG. 1 is equipped on building machinery (not shown), is installed on fixed shell 11, this is solid
Fixed shell 11 is equipped with the hydraulic motor 10 for travelling the building machinery in inside (the detailed illustration is omitted).The planet tooth
Wheel decelerator 1 have rotation shell 12, internal tooth 13, input shaft 14, the 1st sun gear 15, the 1st planetary gear 16, tooth rest 17,
Thrust plate 18, the 2nd sun gear 19 and the 2nd planetary gear 20.Also, planetary reducer 1 is produced to by hydraulic motor 10
Raw rotary driving force is slowed down and increases torque, finally rotation driving is carried out to rotation shell 12, thus to being installed to
The driven part (illustration omitted) for being set to the flange part 30 of rotation shell 12 is driven.In addition, the structure of hydraulic motor 10
It is not particularly limited, for typical, the piston pump of ramp type can be used as hydraulic motor 10.
Rotation shell 12 in planetary reducer 1 is substantially with the construction of hollow cylindrical, from opening for one side
End of the oral area inserted with fixed shell 11.The opening portion coverd part 21 for rotating the other side of shell 12 blocks.Rotate shell 12
It is fixed shell 11 and is kept by shell with bearing 28 (28a, 28b) and rotated freely centered on rotation axis A.I.e., it is revolving
The protruding part 31 that the inner circumferential of transcapsidation body 12 is formed is clamped in two shell bearings of the periphery for being installed to fixed shell 11
Between 28a, 28b, rotates shell 12 and by shell be fixed shell 11 with bearing 28a, 28b and be kept into and rotate freely.It is rotating
The inner circumferential of shell 12 is provided with internal tooth 13, and internal tooth 13 is engaged with the 1st planetary gear 16, the 2nd planetary gear 20 then discussed.This
Outside, internal tooth 13 can be both formed as one with rotation shell 12, can also be formed as seperated and fixed relative to rotation shell 12
Ground installation.
Input shaft 14 is arranged to rotate freely, and is configured at the center in rotation shell 12, and as producing rotary driving force
The hydraulic motor 10 of raw driving source links up.
The end of 1st sun gear 15 and input shaft 14 links, and engages with multiple 1st planetary gears 16.In this embodiment party
In formula, as shown in Figures 2 and 3, circumferentially Dc is staggered and angularly (i.e. 120 degree) configures 3 the 1st planetary gears 16.It is more
A 1st planetary gear 16 is respectively arranged between the 1st sun gear 15 and internal tooth 13, also with the 1st sun gear 15 and internal tooth 13
In engage.Each 1st planetary gear 16 is as the 1st sun gear 15 is from transferring to be driven in rotation, around 15 public affairs of the 1st sun gear
Turn.
As shown in Figure 1, tooth rest 17 constitutes the planet frame for keeping the 1st planetary gear 16, multiple 1st planetary gears 16 are divided
It is not kept into and is rotated freely by gear bearing 23 with cantilever position from side.Specifically, tooth rest 17 has base portion
35 and multiple support shafts 29 (in the present embodiment, 3 support shafts 29).The axial Da that base portion 35 extends in rotation axis A
On be configured at the sides (i.e. the left side of Fig. 1) of multiple 1st planetary gears 16.Multiple support shafts 29 are on axial Da from side direction
The other side highlightedly extends from base portion 35, and multiple 1st planetary gears 16 are kept into rotation respectively with bearing 23 by gear
Freely.Multiple support shafts 29 can be both integrally provided with base portion 35, can also be arranged seperatedly with base portion 35.Multiple
Holding axis 29, circumferentially Dc is staggered and angularly (i.e. 120 degree) configures in the peripheral part of tooth rest 17.Also, multiple support shafts
29 are arranged in a manner of penetrating through respectively corresponding 1st planetary gear 16, link in end side and thrust plate 18.In addition,
Then discuss specific connection form of each support shaft 29 with thrust plate 18 (referring to Fig. 4~6).
Hollow parts are formed in the radial center portion of the flat base portion 35 of tooth rest 17, on the hollow parts edge
Circumferential direction Dc be formed with the inner toothed portion 37 in conjunction with the end spline of the 2nd sun gear 19.
2nd sun gear 19 is formed as cylindrical shape, in the inside of the 2nd sun gear 19 inserted with the 1st sun gear 15
Shaft portion (" sun supporting part " then discussed), be formed with external tooth in the periphery of the 2nd sun gear 19.Tooth rest 17 it is interior
Toothed portion 37 is in conjunction with the external spline, also, the 2nd planetary gear 20 and the outer tooth engagement of multiple (3).3 the 2nd planets
Gear 20 is provided projectingly axle portion at the end face of fixed shell 11 3 positions that circumferentially Dc is set to impartial position respectively
34 are supported to and rotate freely.
[thrust plate]
Thrust plate 18 is configured at the other side (right side of Fig. 1) of multiple 1st planetary gears 16 on axial Da, by connection
Formations 40 is linked up with multiple support shafts 29.The thrust plate 18 is between each support shaft 29 and lid 21, each 1st planet tooth
Extend between wheel 16 and lid 21 and between the 1st sun gear 15 and lid 21, plays limiting gear frame 17, each 1st row
The effect of position on the axial Da of star gear 16 and the 1st sun gear 15.Furthermore it is preferred that thrust plate 18 passes through heat treatment etc.
And hardness and wearability are improved, for each support shaft 29, each 1st planetary gear 16, the 1st sun gear 15 and lid 21
Higher resistance (Japanese: patience) is presented in contact and sliding.
Fig. 2 and thrust plate shown in Fig. 3 18 are made of disk-shaped solid memder, but there is no special for the shape of thrust plate 18
It does not limit, the plan view shape of thrust plate 18 may not be round.In addition, thrust plate 18 both can with multiple Component compositions structure
At the arbitrary processing such as surface processing also can be implemented.In addition, the manufacturing method of thrust plate 18 is also not particularly limited,
The thrust plate 18 of desired shape is simply manufactured using such as punch process.
Fig. 4 is the outline in the section of the linking portion from side between thrust plate 18 shown in FIG. 1 and support shaft 29
Figure.Fig. 1 and connection formations 40 recess portion 60 as possessed by each support shaft 29 shown in Fig. 4 and extend from thrust plate 18 multiple
Protrusion 61 is constituted.
I.e., recess portion 60 is formed in the end of 18 side of thrust plate of each support shaft 29.Recess portion 60 have can with from thrust plate
The shape that the 18 corresponding protrusions 61 extended engage, but the specific shape of recess portion 60 is not particularly limited.For example, as schemed
Shown in 4, recess portion 60 can also be by constituting in the poroid opening portion that each support shaft 29 is formed.In addition, recess portion 60 can also be by leading to
The a part for crossing each support shaft 29 is removed and the notch section (illustration omitted) of formation is constituted.On the other hand, in thrust plate 18 1
Multiple protrusions 61 that being provided with to body can engage respectively with the recess portion 60 of multiple support shafts 29 (in the present embodiment, are dashed forward for 3
Play portion 61).Engaged by corresponding protrusion 61 with each recess portion 60, the end of thrust plate 18 and each support shaft 29 links.It is multiple
Protrusion 61 is configured at the position of the rotational symmetry centered on rotation axis A (Fig. 1 reference), is staggered equal isogonism in circumferential Dc
Degree.
Thrust plate 18 so with the connection of each support shaft 29 is by from tooth rest 17, the 1st sun gear 15 and each 1st
Load in the thrust direction (i.e. axial direction Da) of planetary gear 16, and it is set to multiple press sections of lid 21 shown in FIG. 1
22 pressings.In addition, lid 21 (especially press section 22) is with thrust plate 18 without must contact always, can also lid 21 with
Space is provided between thrust plate 18.
There can be various shape in each protrusion 61 that thrust plate 18 is formed.In the formation of thrust plate 18 for example shown in Fig. 4
There are multiple hole portions 62 (in the present embodiment, 3 hole portions 62), protrusion 61 extends from each hole portion 62.Each protrusion 61 is benefit
With punch process etc. make thrust plate 18 a part bending and formed, each hole portion 62 is unborn by corresponding protrusion 61
Space is constituted.Therefore, the shape of each hole portion 62 is consistent with the shape of corresponding protrusion 61.
In addition, the cross sectional shape of each protrusion 61 is also not particularly limited, for typical, there is rectangular shape.Especially
It is, from the viewpoint of being improved for the strength of connection made between thrust plate 18 and support shaft 29 (i.e. tooth rest 17), each protrusion
61 also can have the wide of the radial Dr more vertical than with axial Da with the width of axial direction Da and radial direction the Dr circumferential Dc being respectively perpendicular
Spend big section.Circumferentially Dc's each 1st planetary gear 16 revolves, therefore, thrust plate 18 and support shaft 29 circumferentially Dc from
Each 1st planetary gear, 16 stress.Thrust plate 18 when therefore, for the revolution for making each 1st planetary gear 16 and support shaft 29 it
Between strength of connection improve from the viewpoint of, preferably increase the width of the circumferential Dc of each protrusion 61 and make the intensity on circumferential Dc
Increase.In addition, each protrusion 61 can also be obliquely arranged relative to the flat part 65 of thrust plate 18.By utilizing each protrusion
The elasticity of shape in portion 61 and configure each protrusion 61 in the state of so that corresponding protrusion 61 is pressed into the sidewall portion of each recess portion 60,
It is capable of increasing strength of connection of the thrust plate 18 relative to each support shaft 29.
In addition, a connection formations 40 shown in Fig. 4 only example, connection formations 40, which can be used, can make thrust
The arbitrary structure that plate 18 is properly fixed relative to each support shaft 29.
For example, as shown in figure 5, connection formations 40 can also be by the peripheral part direction radial direction Dr from thrust plate 18 highlightedly
The recess portion 60 of multiple (3) protrusions 61, each support shaft 29 that are arranged is constituted.Protrusion 61 shown in fig. 5 includes setting setting
Portion 66 extends in substantially vertical direction from the flat part of thrust plate 18 65；Extension 67, from the top for erectting setting unit 66
End is extended in a manner of stretching out towards the outside of radial direction Dr.Each extension 67 to the inside of the recess portion 60 engaged to bend
State configuration, press recess portion 60 sidewall portion.Extension 67 shown in fig. 5 presses the external side wall of the recess portion 60 engaged
Both (referring to the appended drawing reference " B " of Fig. 5) and inside wall portion (referring to the appended drawing reference " C " of Fig. 5), utilize the bullet of extension 67
Property power and thrust plate 18 is firmly fixed relative to support shaft 29 (tooth rest 17).In addition, connection formations shown in Fig. 5
In 40, the range of each 1st planetary gear 16 covered by thrust plate 18 is smaller than connection formations 40 shown in Fig. 4, each support shaft
29 exposure range becomes larger, therefore, can be by working oil (lubricating oil) efficiency recycled in planetary reducer 1 well
It is supplied to gear bearing 23.
In addition, as shown in fig. 6, connection formations 40 can also be more by being protrusively provided from thrust plate 18 towards radial Dr
A (3) protrusion 61, the recess portion 60 of each support shaft 29 constitute the screw division 68 that each protrusion 61 and each recess portion 60 link.
Protrusion 61 shown in fig. 6, which includes, erects setting unit 66, extends from the flat part of thrust plate 18 65 towards direction under vertical；
Extension 67 is extended in a manner of stretching out towards the outside of radial direction Dr from the top end part for erectting setting unit 66.Each extension 67
It is configured in a manner of extending in substantially horizontal direction and being contacted with the bottom of each recess portion 60.Also, screw division 68 is inserted in
It is arranged to the hole of each extension 67, each extension 67 is fixed on to the bottom of recess portion 60 using the screw division 68, thus thrust plate
18 are fixed in each support shaft 29.
In addition, protrusion 61 possessed by the connection formations 40 of Fig. 4~Fig. 6 (including erect setting unit 66 and extension
67) be made of a part of tabular component, the tabular component constitute thrust plate 18, functionally, protrusion 61 be said to be with
Both the different element of thrust plate 18, as the constituent element of invention, can distinguish.
Thrust plate 18 with above-mentioned construction is to cover multiple support shafts 29 of tooth rest 17, multiple 1st planetary gears
The respective at least part of mode of 16 and the 1st sun gear 15 is arranged.Fig. 2 and the covering of thrust plate shown in Fig. 3 18 the 1st are too
The whole of positive gear 15, and cover a part of each 1st planetary gear 16.1st sun gear 15 and multiple 1st planets as a result,
Position on the axial Da of gear 16 is limited by thrust plate 18.
In addition, multiple 1st planetary gears 16, the 1st sun gear 15, multiple support shafts 29 and connection formations 40 are distinguished
Not from the face 18b of the opposite side of the face 18a opposite with multiple 1st planetary gears 16 in the face of thrust plate 18 on axial Da
(i.e. the face 18b of 21 side of lid) is prominent.I.e., multiple 1st planetary gears 16, the 1st sun gear 15, multiple support shafts 29 and company
Knot formations 40 is configured at position identical with the face 18b of thrust plate 18 on axial Da respectively or leans on tooth than the face of the opposite side
The position of 17 side of wheel carrier (left side of Fig. 1).The whole axial length of planetary reducer 1 and compactly structure can be shortened as a result,
At planetary reducer 1.
Fig. 7 is each support shaft 29 and the 1st sun gear of thrust plate 18 shown in FIG. 1, tooth rest 17 from side
The skeleton diagram of 15 section state, indicates the positional relationship of each element.
1st sun gear 15 includes teeth portion (hereinafter referred to as " sun teeth portion ") 45；Supporting part (hereinafter referred to as " sun bearing
Portion ") 46, sun teeth portion 45 is fixedly supported.In addition, multiple 1st planetary gears 16 are respectively provided with: teeth portion is (hereinafter referred to as
" planet teeth portion ") 47, it is engaged with sun teeth portion 45；Supporting part (hereinafter referred to as " planet supporting part ") 48, by planet teeth portion
47 fixedly support.In addition, sun teeth portion 45 and sun supporting part 46 can be both made of integral member, it can also be by independent structure
Part is constituted.Similarly, planet teeth portion 47 and planet supporting part 48 can be both made of integral member, can also be by individual member structure
At.
The thrust plate 18 of present embodiment is matched in a manner of contacting with sun supporting part 46 but not contacting with sun teeth portion 45
It sets, in addition, thrust plate 18 is configured in a manner of it can contact with planet supporting part 48 but not contact with planet teeth portion 47.
In the 1st sun gear 15 shown in Fig. 7, the end face 46a of 18 side of thrust plate of sun supporting part 46 is in axial Da
On be configured at position identical with the end face 29a of 18 side of thrust plate of each support shaft 29.But, the thrust plate of sun supporting part 46
The end face 46a of 18 sides can also be configured at the end face 29a of 18 side of thrust plate than each support shaft 29 away from thrust plate on axial Da
18 remote positions.On the other hand, the end face 45a of 18 side of thrust plate of sun teeth portion 45 is configured at than each bearing on axial Da
The end face 29a of 18 side of thrust plate of axis 29 is away from 18 remote position of thrust plate.Thus, the end of 18 side of thrust plate of sun teeth portion 45
Face 45a is configured at the end face 46a of 18 side of thrust plate than sun supporting part 46 away from 18 remote position of thrust plate on axial Da.
In addition, the end face 48a of 18 side of thrust plate of planet supporting part 48 is in axis in the 1st planetary gear 16 shown in Fig. 7
The position slightly remoter away from thrust plate 18 than the end face 29a of 18 side of thrust plate of each support shaft 29 is configured on Da.But, planet branch
The end face 48a of 18 side of thrust plate of bearing portion 48 can also be configured at the end with 18 side of thrust plate of each support shaft 29 on axial Da
The identical position face 29a.On the other hand, the end face 47a of 18 side of thrust plate of planet teeth portion 47 is configured on axial Da than each
The end face 29a of 18 side of thrust plate of support shaft 29 is away from 18 remote position of thrust plate.More specifically, the thrust of planet teeth portion 47
The end face 47a of 18 side of plate configures the end face 48a with 18 side of thrust plate than planet supporting part 48 away from thrust plate 18 on axial Da
Remote position, and the end face 45a of 18 side of thrust plate than sun teeth portion 45 is configured at away from 18 remote position of thrust plate.
Above-mentioned sun supporting part 46 shown in Fig. 7 has relative to sun teeth portion 45 towards the protuberance outstanding of thrust plate 18
Shape is configured at close to the position (in Fig. 7, contact with thrust plate 18 position) of thrust plate 18.As a result, thrust plate 18 not with
Sun teeth portion 45 is contacted but is contacted with sun supporting part 46, can limit the position of the axial Da of the 1st sun gear 15.Separately
Outside, above-mentioned planet supporting part 48 shown in Fig. 7 has relative to planet teeth portion 47 towards the projecting shape outstanding of thrust plate 18,
It is configured at close to the position (in Fig. 7, departing slightly from the position of thrust plate 18) of thrust plate 18.As a result, thrust plate 18 not with row
Star teeth portion 47 is contacted but is contacted with planet supporting part 48, can limit the position of the axial Da of each 1st planetary gear 16.
In addition, thrust plate 18 can also be contacted with sun teeth portion 45 and planet teeth portion 47, but for preventing these components
From the viewpoint of damage, it may be desirable to which thrust plate 18 is not contacted with sun teeth portion 45 and planet teeth portion 47.In general, gear
Teeth portion has the shape sharper than supporting part.In addition, teeth portion is configured at the position of side more outer than supporting part, revolved in the axis of gear
When turning, compared with supporting part, speed (peripheral speed) and moving distance become larger.Therefore, compared with supporting part, teeth portion is easy to cut thrust
Plate.Thus, by the way that sun supporting part 46 and planet supporting part 48 are set as projecting shape without making thrust plate as shown in Figure 7
18 contact with sun teeth portion 45 and planet teeth portion 47, so as to prevent sun teeth portion 45, planet teeth portion 47 and thrust plate 18
Damage.
In addition, planet teeth portion 47 shown in Fig. 7 is shorter than sun teeth portion 45 on axial Da, with planet teeth portion on axial Da
47 entirety is engaged by the mode that sun teeth portion 45 covers with sun teeth portion 45.1st sun gear 15 and the 1st planetary gear 16 are logical
Often can axially Da is slightly offset from the rotation of, side axis on one side, but construction according to figure 7, though produce it is such partially
From can also securely maintain the fastening state of sun teeth portion 45 and planet teeth portion 47.In addition, planet teeth portion 47 shown in Fig. 7
Entirety be covered on axial Da by sun teeth portion 45, but can also be on axial Da with the whole by planet of sun teeth portion 45
The mode that teeth portion 47 covers constitutes planet teeth portion 47 greatly than sun teeth portion 45.But, in general, comparing the 1st sun gear 15,
The size of 1st planetary gear 16 is larger, and quantity is also more, therefore, the sight for reducing cost for the usage amount of material is inhibited
Point considers that sun teeth portion 45 is bigger than planet teeth portion 47 preferably on axial Da.
In addition, the structure of thrust plate 18 is not limited to form shown in Fig. 7.For example, as shown in figure 8, thrust plate 18
It can have towards the plate protrusion 50 outstanding of sun supporting part 46.The plate protrusion 50 is contacted with sun supporting part 46, but not and too
Positive teeth portion 45 contacts.Has the plate protrusion 50 by thrust plate 18, even sun supporting part 46 does not have the feelings of projecting shape
Under condition, thrust plate 18 can not also be contacted with sun teeth portion 45, but be contacted with sun supporting part 46.Thus, even such as Fig. 8
End face 45a, 46b of 18 side of thrust plate of shown such sun teeth portion 45 and sun supporting part 46 are configured at identical on axial Da
Position in the case where, thrust plate 18 also can properly be contacted by plate protrusion 50 with sun supporting part 46.In addition, by making
End face 45a, 46b of 18 side of thrust plate of sun teeth portion 45 and sun supporting part 46 are in the same plane, can shorten the 1st too
Length on the axial Da of positive gear 15, processing also become easy, and it is possible to realize the cost effective of the 1st sun gear 15.
[work] then, is illustrated the work of planetary reducer 1.
If rotating with the hydraulic motor 10 being set in set casing body 11, rotary driving force is transmitted to input shaft 14.And
And the 1st sun gear 15 rotated together with the rotation of input shaft 14, the 1st planetary gear that engage with the 1st sun gear 15
16 wind the 1st sun gear 15 while engaging with internal tooth 13 carries out revolution motion.As the revolution of the 1st planetary gear 16 is transported
It moves and the rotation of tooth rest 17, the 2nd sun gear 19 rotation combined with the inner toothed portion spline of tooth rest 17.By this
The rotation of 2 sun gears 19, rotatably freely supports to each 2nd planetary gear 20 for being respectively provided projectingly axle portion 34 of fixed shell 11
Rotation, rotates shell 12 and is driven in rotation by engaging between the 2nd planetary gear 20 and internal tooth 13 as a result,.
In above-mentioned a series of movement, thrust plate 18 is rotated centered on rotation axis A together with tooth rest 17, with
Each support shaft 29, the 1st sun gear 15 (especially sun supporting part 46) and each 1st planetary gear, 16 (especially planet branch
Bearing portion 48) contiguously slide, in addition, contiguously being slided with lid 21.In this way, thrust plate 18 allows tooth rest 17, the 1st sun tooth
The rotation of wheel 15 and each 1st planetary gear 16, while limiting gear frame 17, the 1st sun gear 15 and each 1st planetary gear
16 axial position.
It as described above, according to the present embodiment, can not only by using the simple mechanism of thrust plate 18
The axial position of 1 planetary gear 16 of limiting gear frame 17 and Ge, can also limit the axial position of the 1st sun gear 15.
Lean on 17 side of tooth rest (i.e. separate than thrust plate 18 in addition, the various components for constituting planetary reducer 1 are configured at
The side of lid 21) position, rotation shell 12 inside (do not match from thrust plate 18 to 21 side of lid component outstanding
The component being placed between thrust plate 18 and lid 21).The whole axial length of planetary reducer 1 can be shortened as a result, especially
It is that can shorten the axial length of 1 planetary gear 16 of the 1st sun gear 15 and Ge to inhibit the 1st sun gear 15 and Ge 1
The cost of planetary gear 16.
In addition, the components number of the mechanism of the axial position of each 1st planetary gear 16 of limitation and the 1st sun gear 15 compared with
It is few, therefore, it can compactly constitute the mechanism.Especially, without in order to limit in the planetary reducer of present embodiment 1
The axial position of sun gear processed and it is previous required for sphere (such as steel ball), hole machined, with assemble related labour and
In terms of time, cost, the planetary reducer 1 of present embodiment is also advantageous.
[the 1st variation]
The rotary driving force of hydraulic motor 10 is transmitted by input shaft 14 to the 1st sun gear 15, but input shaft 14 and the 1st
Connection form between sun gear 15 is not particularly limited.For example, also can be input shaft 14 and the 1st sun gear 15
One of with convex form engaging protuberances, another one have include engage space including engaging recessed part, be configured to engaging
The engaging protuberances in space engage with engaging recessed part, so that the 1st sun gear 15 be linked with input shaft 14.
Fig. 9 is the schematic sectional view for indicating an example of the connection form between input shaft 14 and the 1st sun gear 15.
In the example shown in Fig. 9, the end of 15 side of the 1st sun gear in input shaft 14 forms engaging protuberances 52, in the 1st sun tooth
The end of 14 side of input shaft in 15 (especially sun supporting parts 46) of wheel is formed with engaging recessed part 53.In the formation of engaging recessed part 53
Engaging space 55 have shape corresponding with engaging protuberances 52, be configured to engaging space 55 engaging protuberances 52 nibbled in engaging
Engage at conjunction portion 54 with engaging recessed part 53, so that the 1st sun gear 15 and input shaft 14 are interconnected.Engage at engaging section 54
Snap fit be not particularly limited, engaging engaging section 54 the arbitrary snap fit such as spline mode can be used.For example, can also
To be, the 1st sun gear 15 is connected to input shaft 14, in the axis direction of rotation (i.e. circumferential direction Dc) centered on rotation axis A
On can integrally be rotated with input shaft 14, and can substantially be relatively moved freely relative to input shaft 14 on axial Da.
In general, in the case where the axis of convex form is configured in series with each other and is linked, the posture of the axis of both sides it is inclined
Difference has an impact the posture of the axis entirety after connection with complementing each other.For example, in the case where the axis of both sides is slightly tilted,
Axis in conjunction with after additively reflects the inclination of the axis of two sides on the whole.In contrast, snap fit as shown in Figure 9 makes like that
In the case that the protrusion of one axis and the recess portion of another axis are chimeric, even if the axis of both sides is slightly tilted, the inclination of the axis of both sides
With will not have an impact with integrally complementing each other the axis after combination.
Thus, mode of connection according to Fig. 9, even if input shaft 14 and the respective posture of the 1st sun gear 15 generate
Deviation (such as inclination), such deviation on after connection input shaft 14 and the influence of 15 bring of the 1st sun gear only compare
It is small.Therefore, it is able to suppress the configuration deviation of the 1st sun gear 15, the teeth portion of such as the 1st sun gear 15 can be effectively prevented
(i.e. sun teeth portion 45) is unexpectedly contacted with thrust plate 18.In addition, can estimate such 1st sun gear 15 smaller
Configuration deviation and design the 1st sun gear 15, therefore, the 1st sun gear 15 (such as sun supporting part 46) can also be reduced
Size on axial Da and radial direction Dr.
[another variation]
For example, in order to improve the engaging section of 1 planetary gear 16 of the 1st sun gear 15 and Ge, at gear bearing 23
Greasy property, can also be in the corresponding position (such as between the 1st sun gear 15 and each 1st planetary gear 16 of thrust plate 18
Engaging section and the gear opposite position of bearing 23) through hole (illustration omitted) is formed, promote lubricating oil using the through hole
Supplement.
Alternatively, it is also possible to be provided in 18 side end of thrust plate of the 1st sun gear 15 (especially sun supporting part 46)
Centre bore.In this case, plate protrusion 50 shown in Fig. 8 also can be set in position corresponding with centre bore, but preferred
It is that the diameter of plate protrusion 50 is constituted than the diameter the earth of centre bore, guarantees the axis rotation of sun supporting part 46, while plate can be made
Protrusion 50 is properly contacted relative to sun supporting part 46.
The present invention is not limited to above-mentioned embodiment and variations.For example, it is also possible to above-mentioned embodiment and
Each element of variation applies various modifications.In addition, including the form of the constituent element other than above-mentioned constituent element
Embodiments of the present invention can be contained in.In addition, not including the form of a part of element in above-mentioned constituent element can also wrap
Contained in embodiments of the present invention.In addition, including a part of constituent element and this that a certain embodiment of the invention is included
The form for a part of constituent element that another embodiment of invention is included can also be contained in embodiments of the present invention.Cause
And the constituent element for respectively being included of above-mentioned embodiment and variation and embodiments of the present invention other than the above
It can also be combined with each other, such combined form can also be contained in embodiments of the present invention.In addition, played by the present invention
Effect is also not limited to above-mentioned effect, can also play distinctive effect corresponding with the specific knot composition of each embodiment
Fruit.In this way, in the range of not departing from technical idea and purport of the invention, can to claims, specification, abstract and
Each element documented by attached drawing carries out various additions, change and part and deletes.
Claims (6)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-125451 | 2017-06-27 | ||
| JP2017125451A JP6949581B2 (en) | 2017-06-27 | 2017-06-27 | Decelerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109139816A true CN109139816A (en) | 2019-01-04 |
Family
ID=64802387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810680077.6A Pending CN109139816A (en) | 2017-06-27 | 2018-06-27 | Retarder |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6949581B2 (en) |
| KR (1) | KR102542803B1 (en) |
| CN (1) | CN109139816A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594583A (en) * | 2019-02-21 | 2020-08-28 | 纳博特斯克有限公司 | Gear device and gear carrier |
| CN113958664A (en) * | 2020-07-20 | 2022-01-21 | 纳博特斯克有限公司 | Reduction mechanism and drive device |
| CN114321286A (en) * | 2020-09-28 | 2022-04-12 | 纳博特斯克有限公司 | Reduction gear and drive device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT523760B1 (en) * | 2020-04-15 | 2022-06-15 | Miba Gleitlager Austria Gmbh | Assembly of components, and a wind turbine in which the assembly of components is installed |
| JP2022012340A (en) * | 2020-07-01 | 2022-01-17 | ナブテスコ株式会社 | Speed reducer, hydraulic motor with speed reducer, construction machine, and manufacturing method of speed reducer |
| KR102321140B1 (en) * | 2021-04-22 | 2021-11-02 | 윤호병 | Harmonic drive |
| US12297893B2 (en) | 2021-07-30 | 2025-05-13 | Minebea Mitsumi Inc. | Speed reducer |
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| US4330045A (en) * | 1979-09-14 | 1982-05-18 | Reliance Electric Company | Vehicle wheel mechanism |
| JP3686739B2 (en) | 1995-12-27 | 2005-08-24 | ナブテスコ株式会社 | Crawler drive unit |
| JP4246566B2 (en) | 2003-08-07 | 2009-04-02 | ナブテスコ株式会社 | Planetary gear reducer |
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- 2017-06-27 JP JP2017125451A patent/JP6949581B2/en active Active
-
2018
- 2018-06-22 KR KR1020180071864A patent/KR102542803B1/en active Active
- 2018-06-27 CN CN201810680077.6A patent/CN109139816A/en active Pending
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| JPH08247223A (en) * | 1995-03-09 | 1996-09-24 | Kayaba Ind Co Ltd | Planetary gear type speed reducer |
| JPH0953553A (en) * | 1995-08-18 | 1997-02-25 | Mitsubishi Electric Corp | Planetary gear reduction mechanism |
| CN101772657A (en) * | 2007-07-31 | 2010-07-07 | 纳博特斯克株式会社 | Gear device and turning portion structure of industrial robot using the gear device |
| CN102770689A (en) * | 2010-03-09 | 2012-11-07 | 爱信艾达株式会社 | hybrid drive |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594583A (en) * | 2019-02-21 | 2020-08-28 | 纳博特斯克有限公司 | Gear device and gear carrier |
| CN111594583B (en) * | 2019-02-21 | 2024-11-19 | 纳博特斯克有限公司 | Gear units and gear racks |
| CN113958664A (en) * | 2020-07-20 | 2022-01-21 | 纳博特斯克有限公司 | Reduction mechanism and drive device |
| CN114321286A (en) * | 2020-09-28 | 2022-04-12 | 纳博特斯克有限公司 | Reduction gear and drive device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019007588A (en) | 2019-01-17 |
| JP6949581B2 (en) | 2021-10-13 |
| KR20190001542A (en) | 2019-01-04 |
| KR102542803B1 (en) | 2023-06-14 |
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