JPS6324279Y2 - - Google Patents

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Publication number
JPS6324279Y2
JPS6324279Y2 JP1118784U JP1118784U JPS6324279Y2 JP S6324279 Y2 JPS6324279 Y2 JP S6324279Y2 JP 1118784 U JP1118784 U JP 1118784U JP 1118784 U JP1118784 U JP 1118784U JP S6324279 Y2 JPS6324279 Y2 JP S6324279Y2
Authority
JP
Japan
Prior art keywords
input shaft
gear
planetary
planetary gear
planetary gears
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.)
Expired
Application number
JP1118784U
Other languages
Japanese (ja)
Other versions
JPS60127151U (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1118784U priority Critical patent/JPS60127151U/en
Publication of JPS60127151U publication Critical patent/JPS60127151U/en
Application granted granted Critical
Publication of JPS6324279Y2 publication Critical patent/JPS6324279Y2/ja
Granted legal-status Critical Current

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Description

【考案の詳細な説明】 産業上の利用分野 この考案は遊星歯車機構を使用した減速装置に
関する。
[Detailed Description of the Invention] Industrial Application Field This invention relates to a speed reduction device using a planetary gear mechanism.

従来技術 従来遊星歯車機構を使用した減速装置として第
1図及び第2図に示すものが公知である。上記減
速装置は偏心した入力軸aを有し、この入力軸a
の偏心部bに軸方向に2個所の歯c,dを有する
プラネタリギヤeが支承されており、このプラネ
タリギヤeの一方の歯cに固定リングギヤfが、
そして他方の歯dに出力軸g側に固定されたリン
グギヤhが夫々噛合されている。このような減速
装置ではもつとも力のかかるプラネタリギヤeの
ベアリングiが大径にできるため、ベアリングi
の寿命向上が図れる反面、プラネタリギヤeとリ
ングギヤf,hの噛合位置が各1個所となるた
め、歯の曲げ応力や面圧が高くなると同時に、分
力である半径力Frが一方向でバランスされてい
ないため、入力軸aや出力軸g及びケースjなど
の剛性を高くする必要があり、重量の増加やコス
トアツプを招ねく不具合があつた。
BACKGROUND ART Conventionally, as a reduction gear device using a planetary gear mechanism, the one shown in FIGS. 1 and 2 is known. The speed reduction device has an eccentric input shaft a, and the input shaft a
A planetary gear e having two teeth c and d in the axial direction is supported on the eccentric part b of the planetary gear e, and a fixed ring gear f is attached to one of the teeth c of the planetary gear e.
A ring gear h fixed to the output shaft g side is meshed with the other tooth d. In such a reduction gear, the bearing i of the planetary gear e, which is subject to force, can be made large in diameter.
On the other hand, since the planetary gear e and the ring gears f and h only mesh at one location each, the bending stress and surface pressure on the teeth increase, and at the same time, the component force radial force Fr is balanced in one direction. Therefore, it is necessary to increase the rigidity of the input shaft a, the output shaft g, the case j, etc., resulting in a problem of increased weight and cost.

考案の目的 この考案はかかる不具合を改善する目的でなさ
れたもので、ベアリングの寿命を損うことなく歯
の曲げ応力や面圧の低減などを図つた減速装置を
提供しようとするものである。
Purpose of the invention This invention was made with the aim of improving such problems, and is intended to provide a reduction gear that reduces the bending stress and surface pressure of the teeth without impairing the life of the bearing.

考案の構成 入力軸に対して偏心したインナレースを有する
ベアリングを介して複数組のプラネタリギヤを上
記入力軸に取付け、プラネタリギヤの1組は固定
リングギヤに、そして他の組は出力軸側のリング
ギヤに噛合させて、ベアリングの寿命を低減させ
ることなく各歯の面圧及び曲げ応力を低減し、同
時に半径力の合力を零にしたことを特徴とする減
速装置。
Structure of the invention: Multiple sets of planetary gears are attached to the input shaft via bearings having inner races eccentric to the input shaft, one set of planetary gears meshes with the fixed ring gear, and the other set meshes with the ring gear on the output shaft side. A speed reduction device characterized in that the surface pressure and bending stress of each tooth are reduced without reducing the life of the bearing, and at the same time, the resultant force of the radial force is reduced to zero.

実施例 以下この考案の一実施例を第3図以下に示す図
面を参照して詳述すると、図において1は入力軸
で、この入力軸1に該入力軸1の中心Oに対して
インナレース2aの中心O1が偏心した3個を1
組とする2組計6個のベアリング2が、インナレ
ース2aを入力軸1に固着されて取付けられてい
る。上記ベアリング2の各インナレース2aの中
心O1は120゜ずつ位相をずらして入力軸1に固着さ
れていて、入力軸1の回転とともに回転されると
共に、各ベアリング2の外周部にプラネタリギヤ
3が設けられている。上記各プラネタリギヤ3の
うち1組目のプラネタリギヤ31,32,33は例
えば歯数がZ3、そして2組目のプラネタリギヤ3
,35,36は歯数がZ3′となつていて、1組目の
プラネタリギヤ31,32,33はケース4の内周
面に形成された歯数Z2の固定リングギヤ5に同時
に噛合されている。また2組目のプラネタリギヤ
4,35,36は上記ケース4の開口部にベアリ
ング6を介して支承された出力軸7の一端側内周
に設けられた歯数Z4のリングギヤ8に噛合されて
いると共に、入力軸1のケース5内側端部はベア
リング9を介して出力軸7の中心部に支承されて
いる。そして各プラネタリギヤ31ないし36のう
ち、第1番目のプラネタリギヤ31と第4番目の
プラネタリギヤ34の間、第2番目のプラネタリ
ギヤ32と第5番目のプラネタリギヤ35の間及び
第3番目のプラネタリギヤ33と第6番目のプラ
ネタリギヤ36の間がそれぞれ固着具11により
連結一体化されていると共に、互に連結されてい
ないプラネタリギヤの間は互に干渉しないように
D>d+2εの透孔3aが固着具11の周囲に穿設
されている。
Embodiment An embodiment of this invention will be described in detail below with reference to the drawings shown in FIG. 2a center O 1 is eccentric three pieces as 1
Two sets of six bearings 2 in total are attached to the input shaft 1 by fixing the inner race 2a to the input shaft 1. The centers O1 of each inner race 2a of the bearing 2 are fixed to the input shaft 1 with a phase shift of 120 degrees, and are rotated with the rotation of the input shaft 1, and a planetary gear 3 is attached to the outer periphery of each bearing 2. It is provided. Among the planetary gears 3, the first set of planetary gears 3 1 , 3 2 , 3 3 have, for example, the number of teeth Z 3 , and the second set of planetary gears 3
4 , 35 , and 36 have the number of teeth Z3 ', and the first set of planetary gears 31 , 32 , and 33 are fixed ring gears with the number of teeth Z2 formed on the inner peripheral surface of the case 4. 5 is engaged at the same time. The second set of planetary gears 3 4 , 3 5 , 3 6 is connected to a ring gear 8 having a number of teeth Z 4 provided on the inner periphery of one end of the output shaft 7 supported in the opening of the case 4 via a bearing 6. In addition to being meshed, the inner end of the case 5 of the input shaft 1 is supported by the center of the output shaft 7 via a bearing 9. Among the planetary gears 31 to 36 , between the first planetary gear 31 and the fourth planetary gear 34 , between the second planetary gear 32 and the fifth planetary gear 35, and between the third planetary gear 32 and the fifth planetary gear 35, The planetary gear 3 3 and the sixth planetary gear 3 6 are connected and integrated by fixing devices 11, and the planetary gears that are not connected to each other are provided with a through hole of D>d+2ε so as not to interfere with each other. 3a is bored around the fixture 11.

なおDは透孔3aの径、dは固着具11の外
径、εは偏心量を示す。
Note that D is the diameter of the through hole 3a, d is the outer diameter of the fixing tool 11, and ε is the amount of eccentricity.

次に作用を説明すると、入力軸1の回転によ
り、120゜ずつ位相差をもつたベアリング2のイン
ナレース2aが回転し、その偏心運動によりベア
リング2の外周部に設けられたプラネタリギヤ3
ないし36のうち、プラネタリギヤ31,32,33
は固定リングギヤ5の内側を自転しながら公転し
て、各プラネタリギヤ31,32,33と固定リン
グギヤ5の歯数差で入力軸1の回転が減速され
る。また1組目のプラネタリギヤ31,32,33
と2組目のプラネタリギヤ34,35,36とは固
着具11により互に連結されているため、減速さ
れた回転は2組目のプラネタリギヤ34,35,3
に伝えられて、さらに出力軸7側のリングギヤ
8の間で、その歯数差により減速されて出力軸7
へ伝えられる。
Next, to explain the operation, the rotation of the input shaft 1 rotates the inner race 2a of the bearing 2, which has a phase difference of 120 degrees, and the eccentric movement causes the planetary gear 3 provided on the outer periphery of the bearing 2 to rotate.
Planetary gears 3 1 , 3 2 , 3 3 among 1 to 3 6
revolves around the fixed ring gear 5 while rotating, and the rotation of the input shaft 1 is decelerated by the difference in the number of teeth between each planetary gear 3 1 , 3 2 , 3 3 and the fixed ring gear 5 . Also, the first set of planetary gears 3 1 , 3 2 , 3 3
and the second set of planetary gears 3 4 , 3 5 , 3 6 are connected to each other by the fixing device 11 , so the reduced rotation is transmitted to the second set of planetary gears 3 4 , 3 5 , 3 .
6 , and is further decelerated between the ring gear 8 on the output shaft 7 side due to the difference in the number of teeth, and the output shaft 7
will be communicated to.

以上により入力軸1と出力軸7間の減速比は 出力軸回転数/入力軸回転数=1−Z2・Z3′/Z3・Z4 となる。 As a result of the above, the reduction ratio between the input shaft 1 and the output shaft 7 is output shaft rotation speed/input shaft rotation speed=1-Z 2・Z 3 '/Z 3・Z 4 .

なお上記実施例ではリングギヤ5及び8に噛合
するプラネタリギヤをそれぞれ3枚としたが、2
枚でも4枚以上にしてもよい。
In the above embodiment, the number of planetary gears meshing with ring gears 5 and 8 was three each, but two
The number may be 4 or more.

考案の効果 この考案は以上詳述したように、プラネタリギ
ヤに大型のベアリングが採用できることから、ベ
アリングの寿命を向上させることができる。また
複数個のプラネタリギヤが同時にリングギヤに噛
合されるため、噛合部における歯の面圧及び曲げ
応力が従来の1個所で噛合するものに比べて低減
できると同時に、半径方向の分力Frの合力が零
となるため、入力軸や出力軸及びケースなどの剛
性を従来のように高くする必要がなく、これによ
つて載量化やコストダウンが図れるようになる。
Effects of the invention As detailed above, this invention allows the use of large bearings in the planetary gear, thereby improving the life of the bearings. In addition, since multiple planetary gears are meshed with the ring gear at the same time, the surface pressure and bending stress of the teeth at the meshing part can be reduced compared to conventional gears that mesh at one location, and at the same time, the resultant force of the radial component force Fr can be reduced. Since this is zero, there is no need to increase the rigidity of the input shaft, output shaft, case, etc. as in the conventional case, and this makes it possible to increase the payload and reduce costs.

【図面の簡単な説明】[Brief explanation of drawings]

第1図及び第2図は従来の減速装置の説明図、
第3図はこの考案の一実施例になる減速装置の断
面図、第4図は第3図−線に沿う断面図であ
る。 1は入力軸、2はベアリング、2aはインナレ
ース、3はプラネタリギヤ、4はケース、5は固
定リングギヤ、7は出力軸、8はリングギヤ。
Figures 1 and 2 are explanatory diagrams of a conventional reduction gear;
FIG. 3 is a cross-sectional view of a reduction gear device according to an embodiment of the invention, and FIG. 4 is a cross-sectional view taken along the line shown in FIG. 3. 1 is an input shaft, 2 is a bearing, 2a is an inner race, 3 is a planetary gear, 4 is a case, 5 is a fixed ring gear, 7 is an output shaft, and 8 is a ring gear.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 入力軸1に、該入力軸1の中心Oに対して偏心
したインナレース2aを有する複数組のベアリン
グ2を、上記インナレース2aの中心O1に位相
差をもたせて取付け、これらベアリング2を介し
て複数組のプラネタリギヤ3を設けると共に、上
記プラネタリギヤ3の1組をケース4に設けた固
定リングギヤ5に、そして他の組を出力軸7側に
設けリングギヤ8に噛合してなる減速装置。
A plurality of sets of bearings 2 each having an inner race 2a eccentric to the center O of the input shaft 1 are attached to the input shaft 1 with a phase difference between the inner races 2a and the center O1 of the inner race 2a. A speed reduction device in which a plurality of sets of planetary gears 3 are provided, one set of the planetary gears 3 is provided on a fixed ring gear 5 provided in a case 4, and the other set is provided on an output shaft 7 side and meshes with a ring gear 8.
JP1118784U 1984-01-31 1984-01-31 reduction gear Granted JPS60127151U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1118784U JPS60127151U (en) 1984-01-31 1984-01-31 reduction gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1118784U JPS60127151U (en) 1984-01-31 1984-01-31 reduction gear

Publications (2)

Publication Number Publication Date
JPS60127151U JPS60127151U (en) 1985-08-27
JPS6324279Y2 true JPS6324279Y2 (en) 1988-07-04

Family

ID=30493074

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1118784U Granted JPS60127151U (en) 1984-01-31 1984-01-31 reduction gear

Country Status (1)

Country Link
JP (1) JPS60127151U (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH086785B2 (en) * 1987-07-08 1996-01-29 住友重機械工業株式会社 Planetary gear

Also Published As

Publication number Publication date
JPS60127151U (en) 1985-08-27

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