JPS62283236A - Planetary gears - Google Patents
Planetary gearsInfo
- Publication number
- JPS62283236A JPS62283236A JP12575586A JP12575586A JPS62283236A JP S62283236 A JPS62283236 A JP S62283236A JP 12575586 A JP12575586 A JP 12575586A JP 12575586 A JP12575586 A JP 12575586A JP S62283236 A JPS62283236 A JP S62283236A
- Authority
- JP
- Japan
- Prior art keywords
- support pin
- planetary
- planetary arm
- arm
- press
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 13
- 239000000463 material Substances 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010273 cold forging Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Retarders (AREA)
- Gears, Cams (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
【発明の詳細な説明】 ３、発明の詳細な説明 〔産業上の利用分野〕 本発明は遊星歯車装置に関するものである。[Detailed description of the invention] 3. Detailed description of the invention [Industrial application field] The present invention relates to a planetary gear system.
従来、遊星減速機の遊星歯車装置は特開昭５７−６９１
４０号公報に示されているように、複数個の遊星歯車を
軸支する支持ピンを、遊星腕に設いるものの、この構造
では支持ピンのピッチ円が不揃いのために生じる半径方
向応力が支持ピンに 。Conventionally, the planetary gear device of the planetary reducer was disclosed in Japanese Patent Application Laid-Open No. 57-691.
As shown in Publication No. 40, a support pin that pivotally supports a plurality of planetary gears is provided on the planetary arm, but in this structure, the radial stress generated due to the uneven pitch circles of the support pins is To the pin.
繰返し加わる場合に、相互の寸法精度がばらつき。Dimensional accuracy varies when applied repeatedly.
あるいは圧入締代の低さから支持ピンの圧入力が不十分
だと支持ピンが緩んだり、抜は出したりして遊星歯車の
正常な噛合いを阻害する問題があった。Alternatively, due to the low press-fitting interference, if the pressing force of the support pin is insufficient, the support pin may loosen or come out, which may impede normal meshing of the planetary gears.
上記従来技術は支持ピンの圧入部分の長さを必要以上に
長くするのが一般的で、この結果、遊星歯車装置の軸方
向寸法が長くなる欠点があった。In the conventional technology described above, the length of the press-fitted portion of the support pin is generally made longer than necessary, and as a result, the axial dimension of the planetary gear device becomes long.
また、軸長を短かくするため遊星腕と支持ピンとを一体
に冷間鍛造で成形することも考えられるが、一般常識と
して冷間成形材料は炭素量の少ない材料に限られている
ので、機械的強度を上げるためには浸炭焼入れ等の熱処
理を施こさなければならず、高精度の遊星歯車装置は得
建い。Additionally, in order to shorten the shaft length, it is possible to cold forge the planetary arm and the support pin together, but as common knowledge, cold forging materials are limited to materials with a low carbon content, so it is difficult to machine them. In order to increase the mechanical strength, heat treatment such as carburizing and quenching must be performed, so a high-precision planetary gear system is a good idea.
更に、射出成形および粉末成形も考えられるが、加熱成
形であるため熱変形により精度が得難く、材質上からも
鉄鋼材料で得られるほどの強度は期待できない等の問題
点があった。Furthermore, injection molding and powder molding are also considered, but since they are heat molded, it is difficult to obtain precision due to thermal deformation, and there are problems in that the strength of the material cannot be expected to be as strong as that obtained with steel materials.
本発明は以上の点に鑑みなされたものであり、軸方法寸
法が短かく、支持ピンに加わる軸方向抜きおよび曲げに
対する機械強度の向上を可能とした遊星歯車装置を提供
することを目的とするものである。The present invention has been made in view of the above points, and an object of the present invention is to provide a planetary gear device that has a short axial dimension and can improve mechanical strength against axial punching and bending applied to support pins. It is something.
上記目的は、遊星歯車を軸支する支持ピンを、その所定
の外周面に円周溝を設けて、中心に出力軸を有する遊星
腕の取付穴に圧入し、かつその円周溝と局部的に塑性変
形された取付穴周囲の遊星腕材料とを噛合して結合する
ことにより、達成される。The above purpose is to provide a support pin that pivotally supports a planetary gear with a circumferential groove on its predetermined outer circumferential surface, press fit it into a mounting hole of a planetary arm having an output shaft in the center, and locally connect it to the circumferential groove. This is achieved by engaging and bonding the planetary arm material around the mounting hole which has been plastically deformed.
支持ピンはこの圧入部分と局部的塑性変形による結合部
分とにより、曲げに対して高い強度を確保すると共に、
局部的塑性変形による結合部は、圧入では確保できない
支持ピンの軸方向抜きに対する高い強度が確保できる。The support pin secures high strength against bending due to this press-fitted part and the connected part by local plastic deformation, and
A joint formed by local plastic deformation can ensure high strength against axial removal of the support pin, which cannot be secured by press-fitting.
これによって圧入部分のみで支持ピンの軸方向抜きに対
する強度を確保する必要がないので、支持ピンの軸方向
長さを短かくすることができる。As a result, it is not necessary to ensure the strength against the support pin being pulled out in the axial direction only by the press-fitted portion, so that the length of the support pin in the axial direction can be shortened.
以下、図示した実施例に基づいて本発明を説明する。第
１図および第２図には本発明の一実施例が示されている
。第１図に示されているように遊星歯車装置は出力軸１
に一律的に連なり、炭素鋼（３４５Ｃ）からなる公転部
分２の遊星腕２ａ。The present invention will be explained below based on the illustrated embodiments. An embodiment of the invention is shown in FIGS. 1 and 2. FIG. As shown in Figure 1, the planetary gear system has an output shaft 1.
The planetary arm 2a of the revolving portion 2 is made of carbon steel (345C).
２の遊星腕２ａの一方の面に植設された通称肌焼鋼（Ｓ
ＣＭ４１５）からなる支持ピン３、この支持ピン３に回
転可能に嵌合された３個の遊星歯車４等から構成されて
いる。そしてこの３個の遊星歯車４の中心部分に遊星歯
車４が外接する入力軸である太陽歯車が配置され、遊里
歯車４の外側に遊星歯車４が内接する内歯車（共に図示
せず）が配置されて、遊星歯車減速装置が構成される。Commonly known as case-hardened steel (S
It consists of a support pin 3 made of CM415), three planetary gears 4 rotatably fitted to the support pin 3, and the like. A sun gear, which is an input shaft in which the planet gears 4 are circumscribed, is arranged at the center of these three planet gears 4, and an internal gear (both not shown), in which the planet gears 4 are inscribed, is arranged on the outside of the planet gears 4. As a result, a planetary gear reduction device is constructed.
なお同図において５は軸受であるにのように構成された
遊星歯車装置で本実施例では支持ピン３を、その所定の
外周面に円周溝６を設けて遊星腕２ａの取付穴７に圧入
すると共に、その外周を局部的に塑性変形させた取付穴
７の周囲の遊星腕２ａで噛合して結合固定した。このよ
うにすることによテで支持ピン３は、その所定の外周面
に円周溝６を設けて遊星腕２ａの取付穴７に圧入される
と共に、その外周が局部的に塑性変形させた取付穴７の
周囲の遊星腕２ａで噛合して結合固定されるようになっ
て、支持ピン３は曲げおよび軸方向抜きに対する高い強
度が確保できるようになり、軸方法寸法が短かく、支持
ピン３に加わる軸方向抜きおよび曲げに対する機械強度
の向上を可能とした遊星歯車装置を得ることができる。In the same figure, reference numeral 5 denotes a bearing, which is a planetary gear device configured as shown in FIG. While being press-fitted, the planetary arms 2a around the mounting hole 7, whose outer periphery was locally plastically deformed, were engaged and fixed together. By doing so, the support pin 3 is press-fitted into the mounting hole 7 of the planetary arm 2a by providing a circumferential groove 6 on its predetermined outer circumferential surface, and its outer circumference is locally plastically deformed. The planetary arm 2a around the mounting hole 7 engages with the planetary arm 2a to secure the support pin 3, ensuring high strength against bending and axial pullout. Thus, it is possible to obtain a planetary gear device that can improve mechanical strength against axial punching and bending.
すなわち第２図に示されているように、複数条の円周溝
６を設けた支持ピン３を、遊星腕２ａの取付穴７に圧ス
し、その後支持ピン３の周囲近傍の遊星腕２ａの端面部
を押圧金型で抑圧塑性変形させ、支持ピン３に設けた複
数条の円周溝６と抑圧塑性変形させた遊星腕２ａの端面
部の押圧部８とを噛合させ、支持ピン３と遊星腕２ａと
を結合する。That is, as shown in FIG. 2, the support pin 3 provided with a plurality of circumferential grooves 6 is pressed into the mounting hole 7 of the planetary arm 2a, and then the planetary arm 2a near the periphery of the support pin 3 is inserted into the mounting hole 7 of the planetary arm 2a. The end surface of the planet arm 2a is plastically deformed using a pressing die, and the plurality of circumferential grooves 6 provided on the support pin 3 are engaged with the pressing portion 8 of the end surface of the planetary arm 2a which has been plastically deformed. and the planetary arm 2a.
イ
すなわち軟かい遊星腕２ａの試料を結合面である支持ピ
ン３の円周溝６に直角に流動させ、円周溝６内の円周突
起部によって局部的に塑性変形させ、そこに発生する高
い結合力によって結合させる。この場合に支持ピン３の
圧入部９は遊星腕２ａの取付穴７に圧入結合される。In other words, the sample of the soft planetary arm 2a is caused to flow perpendicularly to the circumferential groove 6 of the support pin 3, which is the coupling surface, and is locally plastically deformed by the circumferential protrusion in the circumferential groove 6. Combine with high bonding strength. In this case, the press-fitting portion 9 of the support pin 3 is press-fitted into the mounting hole 7 of the planetary arm 2a.
このように本実施例によれば支持ピン３の一端が遊星腕
２ａの取付穴７に圧入されているので、半径方向応力に
対して強く、かつ支持ピン３と遊星腕２ａとが円周溝６
部で機械的に強固に結合されているので、遊星腕２ａの
固定部分の軸方向寸法を短かくでき、遊星歯車装置を軸
長の短かいものとすることができる。また支持ピン３は
遊星腕２ａより硬ければ、任意の硬さのものを選ぶこと
ができ、結合後に熱処理等が不要なため生産性の高いも
のとなる。According to this embodiment, one end of the support pin 3 is press-fitted into the mounting hole 7 of the planetary arm 2a, so it is strong against radial stress, and the support pin 3 and the planetary arm 2a are connected to the circumferential groove. 6
Since the fixed portion of the planetary arm 2a is mechanically and firmly connected at the portion thereof, the axial dimension of the fixed portion of the planetary arm 2a can be shortened, and the axial length of the planetary gear device can be shortened. Further, the support pin 3 can be of any hardness as long as it is harder than the planetary arm 2a, and since no heat treatment or the like is required after joining, productivity is high.
以上の実施例をＡとしてその効果を従来例Ｂ。The above embodiment is referred to as A, and its effect is referred to as conventional example B.
Ｃと比較検討した結果が第３図に示されている。The results of comparison with C are shown in Figure 3.
同図は縦軸に曲げモーメントをとり、横軸に繰返し回数
をとって、繰返し回数と曲げモーメントとの関係を示し
たものであるが、実施例Ａ、従来例Ｂ、Ｃとも遊星腕２
ａの厚さを５．５ｎａ、取付穴の径ｄを６．ＬｌｘＩ＋
とじた。すなわち支持ピン３の遊星腕２ａへの圧入固定
部（結合部）を５．５ｍｍとし、図中矢印表示の曲げた
モーメントを支持ピン３に繰返し加えた。検討結果は同
図から明らかなように、実施例Ａは従来例Ｂ、Ｃよりも
同−曲げたモーメントに対する繰返し回数が大きく、す
ぐれているのが認められた。このように実施例Ａがすぐ
れた特性をを示したのは、実施例Ａの支持ピン３は圧入
部分と局部的塑性変形とによる結合部分とをもって遊星
腕２ａに結合固定されるためである。The figure shows the relationship between the number of repetitions and the bending moment, with the vertical axis representing the bending moment and the horizontal axis representing the number of repetitions.
The thickness of a is 5.5 na, and the diameter d of the mounting hole is 6. LlxI+
Closed. That is, the press-fit fixing part (joint part) of the support pin 3 to the planetary arm 2a was set to 5.5 mm, and the bending moment indicated by the arrow in the figure was repeatedly applied to the support pin 3. As is clear from the figure, Example A was found to be superior to Conventional Examples B and C in that the number of repetitions for the same bending moment was greater than that of Conventional Examples B and C. The reason why Embodiment A exhibited such excellent characteristics is that the support pin 3 of Embodiment A is coupled and fixed to the planetary arm 2a using a press-fitted portion and a coupled portion formed by local plastic deformation.
第４図および第５図には本発明の他の実施例が示されて
いる。本実施例は遊星腕２ａの取付穴７ａを、支持ピン
３の円周溝６に対応する嵌合部７ｂと圧入部７ｃとにわ
けて形成した。このようにすることにより嵌合部７ｂを
支持ピン３の圧入時の案内として利用でき、前述の場合
よりも作業性を向上することができる。勿論嵌合部７ｂ
は、抑圧塑性変形させられた円周溝６近傍の材料と円周
溝６内の突起とを噛合させるので、強度的には変化は生
じない。Another embodiment of the invention is shown in FIGS. 4 and 5. In this embodiment, the mounting hole 7a of the planetary arm 2a is divided into a fitting part 7b corresponding to the circumferential groove 6 of the support pin 3 and a press-fitting part 7c. By doing so, the fitting portion 7b can be used as a guide when the support pin 3 is press-fitted, and work efficiency can be improved compared to the above-mentioned case. Of course, the fitting part 7b
Since the material in the vicinity of the circumferential groove 6 which has been subjected to suppressed plastic deformation engages with the protrusion within the circumferential groove 6, no change occurs in terms of strength.
上述のように本発明は軸方性寸法が短かく、支持ピンに
加わる軸方向抜きおよび曲げに対する機械強度が向上す
るようになって、軸方向寸法が短かく、支持ピンに加わ
る軸方向抜きおよび曲げに対する機械強度の向上を可能
とした遊星歯車装置を得ることができる。As described above, the present invention has a short axial dimension and improves mechanical strength against axial punching and bending applied to the support pin. A planetary gear device with improved mechanical strength against bending can be obtained.
第１図は本発明の遊星歯車装置の一実施例の一部縦断面
図、第２図は同じく一実施例の結合部要部の縦断面図、
第３図は本発明の遊星歯車装置の一実施例による支持ピ
ンと従来例による支持ピンとの曲げモーメントと繰返し
回数との関係を示す特性図、第４図は本発明の遊星歯車
装置の他の実施例の支持ピンの縦断側面図、第５図は同
じく他の実施例の結合部要部の縦断側面図である。
ｌ・・・出力軸、２ａ・・遊星腕、３・支持ピン、４・
・遊星歯車、６・・円周溝、７．７ａ・・・取付穴、７
ｂ活１図FIG. 1 is a partial vertical cross-sectional view of an embodiment of the planetary gear device of the present invention, FIG. 2 is a vertical cross-sectional view of the main part of the coupling part of the same embodiment,
FIG. 3 is a characteristic diagram showing the relationship between the bending moment and the number of repetitions between a support pin according to an embodiment of the planetary gear device of the present invention and a support pin according to a conventional example, and FIG. FIG. 5 is a longitudinal sectional side view of the support pin of the example, and FIG. 5 is a longitudinal sectional side view of the main part of the coupling part of another embodiment. l...output shaft, 2a...planetary arm, 3.support pin, 4.
・Planetary gear, 6...Circumferential groove, 7.7a...Mounting hole, 7
b life diagram 1
Claims (1)
の面の同一円周上に植設された複数個の支持ピンと、こ
の支持ピンの夫々に支承され、かつ内歯車に噛合する遊
星歯車とを備え、前記遊星腕には前記支持ピンを植設す
る取付穴が設けられている遊星歯車装置において、前記
支持ピンが、その所定の外周面に円周溝を設けて前記遊
星腕の取付穴に圧入されると共に、その外周が局部的に
塑性変形させた取付穴の周囲の前記遊星腕で噛合して結
合固定されたものであることを特徴とする遊星歯車装置
。 ２、前記円周溝が、噛合した複数条の溝で形成されたも
のである特許請求の範囲第１項記載の遊星歯車装置。[Claims] 1. A planetary arm having an output shaft at the center, a plurality of support pins implanted on the same circumference on one side of the planetary arm, and a planetary arm supported by each of the support pins. , and a planetary gear that meshes with an internal gear, and the planetary arm is provided with a mounting hole in which the support pin is implanted, the support pin having a circumferential surface on a predetermined outer peripheral surface thereof. It is characterized in that it is press-fitted into the mounting hole of the planetary arm by providing a groove, and is engaged and fixed by the planetary arm around the mounting hole whose outer periphery is locally plastically deformed. Planetary gearbox. 2. The planetary gear device according to claim 1, wherein the circumferential groove is formed by a plurality of meshing grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12575586A JPS62283236A (en) | 1986-06-02 | 1986-06-02 | Planetary gears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12575586A JPS62283236A (en) | 1986-06-02 | 1986-06-02 | Planetary gears |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62283236A true JPS62283236A (en) | 1987-12-09 |
Family
ID=14918011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12575586A Pending JPS62283236A (en) | 1986-06-02 | 1986-06-02 | Planetary gears |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62283236A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016023695A (en) * | 2014-07-18 | 2016-02-08 | 日本電産シンポ株式会社 | Speed reducer |
| CN111828555A (en) * | 2019-04-16 | 2020-10-27 | 株式会社电装 | Rotary actuator |
-
1986
- 1986-06-02 JP JP12575586A patent/JPS62283236A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016023695A (en) * | 2014-07-18 | 2016-02-08 | 日本電産シンポ株式会社 | Speed reducer |
| CN111828555A (en) * | 2019-04-16 | 2020-10-27 | 株式会社电装 | Rotary actuator |
| JP2020176661A (en) * | 2019-04-16 | 2020-10-29 | 株式会社デンソー | Rotary actuator |
| US11708880B2 (en) | 2019-04-16 | 2023-07-25 | Denso Corporation | Rotary actuator |
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