JP2571673Y2 - Planetary roller type power transmission - Google Patents
Planetary roller type power transmissionInfo
- Publication number
- JP2571673Y2 JP2571673Y2 JP1992002398U JP239892U JP2571673Y2 JP 2571673 Y2 JP2571673 Y2 JP 2571673Y2 JP 1992002398 U JP1992002398 U JP 1992002398U JP 239892 U JP239892 U JP 239892U JP 2571673 Y2 JP2571673 Y2 JP 2571673Y2
- Authority
- JP
- Japan
- Prior art keywords
- planetary
- shaft
- planetary roller
- outer ring
- roller
- 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 - Lifetime
Links
Landscapes
- Friction Gearing (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、遊星ローラ式動力伝達
装置に係り、詳しくは、遊星ローラをキャリアに回転自
在に軸支する部分の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planetary roller type power transmission device, and more particularly to a structure for rotatably supporting a planetary roller on a carrier.
【０００２】[0002]
【従来の技術】遊星ローラ式動力伝達装置は、図３に示
すように、ハウジング２１に固定の外輪２２と、この外
輪２２の内側に同心に配置された太陽軸２３と、太陽軸
２３と外輪２２との間に圧接状に介装された複数の遊星
ローラ２４，・・・と、遊星ローラ２４の公転により連
動回転するキャリア２５とからなるものである。増減速
が１段の装置では、太陽軸２３が高速の入出力軸とな
り、キャリア２５には低速の入出力軸２６が一体に直結
される。2. Description of the Related Art As shown in FIG. 3, a planetary roller type power transmission device has an outer race 22 fixed to a housing 21, a sun shaft 23 disposed concentrically inside the outer race 22, a sun shaft 23 and an outer race. , And a plurality of planetary rollers 24,..., Which are interposed in a press-contact manner between the planetary rollers 22 and a carrier 25 which rotates in conjunction with the planetary rollers 24 revolving. In an apparatus having one stage of acceleration / deceleration, the sun shaft 23 is a high-speed input / output shaft, and the low-speed input / output shaft 26 is directly and integrally connected to the carrier 25.
【０００３】そして、各遊星ローラ２４は、キャリア２
５に突設された遊星軸２７に回転自在に取り付けられ
る。ここで、従来のこの種の装置では、図３および図４
に示すように、遊星軸２７と遊星ローラ２４との間に針
状ころ軸受２８を介装する場合と、図４で示すように、
玉軸受２９を介装する場合がある。[0003] Each planetary roller 24 is mounted on the carrier 2.
5 is rotatably attached to the planetary shaft 27 protruding therefrom. Here, in this type of conventional apparatus, FIGS.
As shown in FIG. 4, when a needle roller bearing 28 is interposed between the planetary shaft 27 and the planetary roller 24, and as shown in FIG.
A ball bearing 29 may be interposed.
【０００４】[0004]
【考案が解決しようとする課題】ところで、遊星軸２７
と遊星ローラ２４との間に針状ころ軸受２８を介装した
ものでは、遊星ローラのスキューにより、遊星ローラ２
４が軸方向に遊動しやすい。そのため、遊星ローラ２４
の転動経路の両側に位置するよう外輪２２に鍔２２ａを
設けて、この鍔２２ａにより、遊星ローラ２４の遊動を
抑えるようにしている。しかしながら、このように、外
輪２２に鍔２２ａがあると、この鍔２２ａと遊星ローラ
２４との摩擦により、出力回転速度に細かい変動（速度
リプル）が生じる。[Problems to be Solved by the Invention] By the way, the planetary shaft 27
The present invention was interposed needle roller bearing 28 between the planetary roller 24, the skew of the planetary rollers, the planetary rollers 2
4 easily moves in the axial direction. Therefore, the planetary rollers 24
The outer ring 22 is provided with a flange 22a so as to be located on both sides of the rolling path of the roller 22, and the flange 22a prevents the planetary roller 24 from floating. However, if the outer ring 22 has the flange 22a, the friction between the flange 22a and the planetary roller 24 causes a small fluctuation (speed ripple) in the output rotation speed.
【０００５】このような速度リプルを減少させるために
採用されているのが、遊星軸２７と遊星ローラ２４との
間に玉軸受２９を設けた構造である。この構造では、玉
軸受２９により遊星ローラ２４の軸方向の遊動が抑制さ
れるので、外輪２２に鍔２２ａを設ける必要がなく、鍔
２２ａと遊星ローラ２４との摩擦に伴う速度リプルは生
じなくなる。A structure in which a ball bearing 29 is provided between the planetary shaft 27 and the planetary roller 24 is employed to reduce such speed ripples. In this structure, since the axial movement of the planetary roller 24 is suppressed by the ball bearing 29, it is not necessary to provide the outer ring 22 with the flange 22a, and the speed ripple due to the friction between the flange 22a and the planetary roller 24 does not occur.
【０００６】しかしながら、玉軸受２９を介装したもの
では、針状ころ軸受２８を介装したものに比べ負荷容量
が減少する。特に、小型の装置では、遊星ローラ２４の
内径が小径になるので、玉軸受２９も小径となり、負荷
容量が大幅に減少する。However, the load capacity of the bearing with the ball bearing 29 is smaller than that of the bearing with the needle roller bearing 28. In particular, in a small-sized device, since the inner diameter of the planetary roller 24 is reduced, the diameter of the ball bearing 29 is also reduced, and the load capacity is greatly reduced.
【０００７】また、玉軸受２９は、針状ころ軸受２８に
比べると、径方向に大きなスペースを必要とするから、
その分、遊星軸２７を小径にする必要があり、遊星軸２
７のねじり剛性が低下する。Further, since the ball bearing 29 requires a larger space in the radial direction than the needle roller bearing 28,
It is necessary to reduce the diameter of the planetary shaft 27 by that much,
7, the torsional rigidity is reduced.
【０００８】本考案は、かかる従来の問題点に鑑み、負
荷容量の減少および遊星軸のねじり剛性の低下を招来す
ることなく、速度リプルを減少させることを課題とす
る。SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to reduce the speed ripple without reducing the load capacity and the torsional rigidity of the planet shaft.
【０００９】[0009]
【課題を解決するための手段】本考案にかかる遊星ロー
ラ式動力伝達装置は、固定の外輪と、この外輪の内側に
同心に配置された太陽軸と、太陽軸と外輪との間に圧接
状に介装された複数の遊星ローラと、遊星ローラの公転
により連動回転するキャリアとからなるものであって、
キャリアに突設された遊星軸と遊星ローラとの間には、
針状ころ軸受と玉軸受とが遊星軸のキャリアに近い側か
ら遠い側へと軸方向に沿って並列したうえで介装されて
おり、かつ、遊星ローラの外径は針状ころ軸受がある箇
所よりも玉軸受がある箇所の方が小径とされている、こ
とを特徴としている。[MEANS FOR SOLVING THE PROBLEMS] A planetary law according to the present invention.
The la-type power transmission device includes a fixed outer ring, a sun shaft concentrically arranged inside the outer ring, a plurality of planetary rollers interposed in a press-contact manner between the sun shaft and the outer ring, and a planetary roller. be comprised of a carrier interlocked rotated by revolution,
Between the planetary shaft and the planetary rollers projecting from the carrier,
Is the needle roller bearing and ball bearing closer to the planetary shaft carrier?
It is interposed in terms of the parallel al to the far side in the axial direction
And the outer diameter of the planetary roller is
The location where the ball bearing is located has a smaller diameter than the location where
It is characterized by .
【００１０】[0010]
【作用】上記の構成において、針状ころ軸受が介在する
ことで、遊星ローラは大きな負荷を受けられる。また、
遊星軸の軸方向の遊動は玉軸受により抑制されるから、
外輪に鍔を設ける必要がない。遊星軸は、玉軸受を設け
る部分だけ小径にすればよいから、特にねじり剛性の低
下は生じない。In the above construction, the planetary roller can receive a large load due to the interposition of the needle roller bearing. Also,
Since the axial play of the planet shaft is suppressed by the ball bearing,
There is no need to provide a collar on the outer ring. Since the diameter of the planetary shaft may be reduced only at the portion where the ball bearing is provided, the torsional rigidity does not decrease.
【００１１】[0011]
【実施例】以下、本考案の詳細を図１および図２に示す
一実施例に基づいて説明する。図１は、本考案の一実施
例に係る遊星ローラ式動力伝達装置の断面図、図２はそ
の要部の拡大断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to one embodiment shown in FIGS. FIG. 1 is a sectional view of a planetary roller type power transmission device according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of a main part thereof.
【００１２】図１に示すように、この実施例の動力伝達
装置は、増減速が二段の装置で、各段Ａ，Ｂは、従来の
装置と同様に、ハウジング１に固定の外輪２と、この外
輪２の内側に同心に配置された太陽軸３と、太陽軸３と
外輪２との間に圧接状に介装された複数の遊星ローラ
４，・・・と、遊星ローラ４の公転により連動回転する
キャリア５とで構成されている。各段Ａ，Ｂのうち、低
速段Ａのキャリア５に低速の入出力軸６が取り付けら
れ、同段Ａの太陽軸３が次の高速段Ｂのキャリア５に直
結され、この高速段Ｂの太陽軸３が高速の入出力軸とな
っている。なお、外輪２は、ハウジング１の一部を硬化
処理することによりハウジング１に一体に形成されてい
る。As shown in FIG. 1, the power transmission device of this embodiment is a device having two stages of acceleration and deceleration, and each of stages A and B has an outer ring 2 fixed to a housing 1 like a conventional device. A sun shaft 3 concentrically arranged inside the outer ring 2, a plurality of planetary rollers 4,... Interposed between the sun shaft 3 and the outer ring 2 in a press-contact manner, and the revolution of the planetary roller 4. And the carrier 5 that rotates in conjunction with the carrier 5. Among the stages A and B, the low-speed input / output shaft 6 is attached to the carrier 5 of the low-speed stage A, and the sun shaft 3 of the same stage A is directly connected to the carrier 5 of the next high-speed stage B. The sun axis 3 is a high-speed input / output axis. The outer ring 2 is formed integrally with the housing 1 by curing a part of the housing 1.
【００１３】そして、各段Ａ，Ｂの遊星ローラ４は、キ
ャリア５に突設された遊星軸７に回転自在に取り付けら
れるが、この実施例は、遊星ローラ４を遊星軸７に設け
る部分の構造に特徴がある。すなわち、図２に明示する
ように、遊星軸７と遊星ローラ４との間には、針状ころ
軸受８と玉軸受９とが軸方向に沿って並列したうえで介
装されている。そして、この際における遊星軸７の基端
側（キャリア５側）には針状ころ軸受８が設けられてい
る一方、それよりも先端側に位置する遊星軸７の小径部
７ａには玉軸受９が設けられている。また、遊星ローラ
４は、玉軸受９がある個所では、外径が小径部４ａに形
成されて、外輪２や太陽軸３に接触しないようになって
いる。The planetary rollers 4 of each stage A and B are rotatably mounted on a planetary shaft 7 protruding from the carrier 5. In this embodiment, the planetary rollers 4 are provided on the planetary shaft 7. The structure is characteristic. That is, as best shown in FIG. 2, between the planet shaft 7 and the planetary rollers 4, needle roller along the bearing 8 and the ball bearing 9 axial direction are interposed upon in parallel. At this time , a needle roller bearing 8 is provided on the base end side (the carrier 5 side) of the planetary shaft 7.
That one, the ball bearing 9 is provided in the small-diameter portion 7a of the planetary shaft 7 positioned at the front end side thereof. Further, the outer diameter of the planetary roller 4 is formed in the small diameter portion 4a at a position where the ball bearing 9 is located, so that the planetary roller 4 does not contact the outer ring 2 or the sun shaft 3.
【００１４】上記の構成において、遊星軸７と遊星ロー
ラ４との間に針状ころ軸受８が介在することで、遊星ロ
ーラ４は大きな負荷を受けられ、玉軸受のみを設けたも
のに比べ、負荷容量が増大する。また、遊星ローラのス
キューにより、遊星ローラ４が軸方向に遊動しようとし
ても、その遊動は玉軸受９により抑制される。そのた
め、遊星ローラ９の軸方向の遊動を抑制するために外輪
２に鍔を設ける必要がなく、外輪２の鍔と遊星ローラ４
との摩擦に起因する速度リプルは発生しない。In the above-described configuration, the needle roller bearing 8 is interposed between the planetary shaft 7 and the planetary roller 4, so that the planetary roller 4 can receive a large load. The load capacity increases. Further, the skew of the planetary rollers, the planetary rollers 4 are also trying to loose in the axial direction, the floating is suppressed by the ball bearing 9. Therefore, it is not necessary to provide a flange on the outer ring 2 to suppress the axial movement of the planetary roller 9, and the flange of the outer ring 2 and the planetary roller 4 are not required.
No speed ripple occurs due to friction with the motor.
【００１５】遊星軸７は、玉軸受９を設ける先端部分だ
け小径にすればよく、他の部分は比較的大径に形成しう
るから、ほとんどねじり剛性の低下が生じない。The diameter of the planetary shaft 7 can be reduced only at the tip portion where the ball bearing 9 is provided, and the other portion can be formed relatively large in diameter, so that the torsional rigidity hardly decreases.
【００１６】[0016]
【考案の効果】以上述べたように、本考案によれば、外
輪に鍔を設ける必要がなく、この鍔に起因する速度リプ
ルを減少させることができる。As described above, according to the present invention, it is not necessary to provide a flange on the outer ring, and the speed ripple caused by the flange can be reduced.
【００１７】しかも、この場合、針状ころ軸受が介在す
ることで、大きな負荷容量が得られ、また、遊星軸は玉
軸受を設ける個所だけ小径にすればよいから、ねじり剛
性がほとんど低下しない。In addition, in this case, a large load capacity can be obtained by interposing the needle roller bearing, and the torsional rigidity is hardly reduced because the planetary shaft need only be reduced in diameter at the portion where the ball bearing is provided.
【図１】本考案の一実施例に係る遊星ローラ式動力伝達
装置の断面図。FIG. 1 is a sectional view of a planetary roller type power transmission device according to an embodiment of the present invention.
【図２】上記実施例の要部の拡大断面図。FIG. 2 is an enlarged sectional view of a main part of the embodiment.
【図３】従来の遊星ローラ式動力伝達装置の拡大断面
図。FIG. 3 is an enlarged sectional view of a conventional planetary roller type power transmission device.
【図４】他の従来例の要部の拡大断面図。FIG. 4 is an enlarged sectional view of a main part of another conventional example.
１ ハウジング ２ 外輪 ３ 太陽軸 ４ 遊星ローラ ５ キャリア ７ 遊星軸 ８ 針状ころ軸受 ９ 玉軸受 DESCRIPTION OF SYMBOLS 1 Housing 2 Outer ring 3 Sun shaft 4 Planetary roller 5 Carrier 7 Planetary shaft 8 Needle roller bearing 9 Ball bearing
フロントページの続き (56)参考文献 特開 昭51−24460（ＪＰ，Ａ) 実開 昭56−85751（ＪＰ，Ｕ) 特公 昭52−44557（ＪＰ，Ｂ２) 実公 昭47−34444（ＪＰ，Ｙ１) 実公 昭62−29697（ＪＰ，Ｙ２)Continuation of front page (56) References JP-A-51-24460 (JP, A) JP-A-56-85751 (JP, U) JP-B-52-44557 (JP, B2) JP-B-47-34444 (JP) , Y1) Jiko 62-29697 (JP, Y2)
Claims (1)
配置された太陽軸と、太陽軸と外輪との間に圧接状に介
装された複数の遊星ローラと、遊星ローラの公転により
連動回転するキャリアとからなる遊星ローラ式動力伝達
装置において、キャリアに突設された遊星軸と遊星ロー
ラとの間には、針状ころ軸受と玉軸受とが遊星軸のキャ
リアに近い側から遠い側へと軸方向に沿って並列したう
えで介装されており、かつ、遊星ローラの外径は針状こ
ろ軸受がある箇所よりも玉軸受がある箇所の方が小径と
されている、ことを特徴とする遊星ローラ式動力伝達装
置。1. A fixed outer ring, a sun shaft concentrically arranged inside the outer ring, a plurality of planetary rollers interposed in a press-contact manner between the sun shaft and the outer ring, and a revolution of the planetary roller. in the planetary roller type power transmission device comprising a carrier in conjunction rotation between the planetary shaft and the planetary rollers projecting from the carrier, needle roller bearings and ball bearings and is calibration of the planetary shaft
Parallel along the near rear side to the far side in the axial direction rain
And the outer diameter of the planetary roller is needle-shaped.
The location of the ball bearing is smaller than that of the ball bearing
It is, that the planetary roller type power transmission device according to claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992002398U JP2571673Y2 (en) | 1992-01-27 | 1992-01-27 | Planetary roller type power transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992002398U JP2571673Y2 (en) | 1992-01-27 | 1992-01-27 | Planetary roller type power transmission |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0559025U JPH0559025U (en) | 1993-08-03 |
| JP2571673Y2 true JP2571673Y2 (en) | 1998-05-18 |
Family
ID=11528139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992002398U Expired - Lifetime JP2571673Y2 (en) | 1992-01-27 | 1992-01-27 | Planetary roller type power transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2571673Y2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4734444U (en) * | 1971-05-12 | 1972-12-16 | ||
| JPS5244557A (en) * | 1975-10-07 | 1977-04-07 | Toshiba Corp | Manufacturing process of cathode-ray tube fluorescent surface |
| JPS6229697U (en) * | 1985-08-02 | 1987-02-23 |
-
1992
- 1992-01-27 JP JP1992002398U patent/JP2571673Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0559025U (en) | 1993-08-03 |
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