JPH0135013Y2 - - Google Patents
Info
- Publication number
- JPH0135013Y2 JPH0135013Y2 JP17658884U JP17658884U JPH0135013Y2 JP H0135013 Y2 JPH0135013 Y2 JP H0135013Y2 JP 17658884 U JP17658884 U JP 17658884U JP 17658884 U JP17658884 U JP 17658884U JP H0135013 Y2 JPH0135013 Y2 JP H0135013Y2
- Authority
- JP
- Japan
- Prior art keywords
- roller
- casing
- case cover
- inner roller
- power transmission
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims description 24
- 239000013013 elastic material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Friction Gearing (AREA)
Description
【考案の詳細な説明】
〈産業上の利用分野〉
本考案は、相互に接触するローラの摩擦力によ
り動力を伝達する遊星ローラ式動力伝達装置に関
する。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a planetary roller type power transmission device that transmits power by the frictional force of rollers that are in contact with each other.
〈従来の技術〉
遊星ローラ式動力伝達装置は、第１の軸に連結
された太陽ローラとケーシングに固定された内ロ
ーラとにそれぞれ第２の軸に枢支された複数の遊
星ローラを当接させたものであり、第１と第２の
軸間又は、第１若しくは第２の軸とケーシングと
の間に動力を伝達するものである。<Prior Art> A planetary roller type power transmission device has a plurality of planetary rollers pivotally supported on a second shaft in contact with a sun roller connected to a first shaft and an inner roller fixed to a casing, respectively. It transmits power between the first and second shafts or between the first or second shaft and the casing.
第２図に第１の軸を回転自在な入力軸１とし、
第２の軸を回転自在な出力軸３とした形式の従来
の遊星ローラ式動力伝達装置を示す。入力軸１の
端部には太陽ローラ２が連結固定されるととも
に、出力軸３のキヤリヤ４に固定された複数の遊
星ピン５それぞれにはニードル軸受６を介して回
転自在に遊星ローラ７が前記太陽ローラ２の外周
面に接触して支承される一方、ケーシング８には
前記遊星ローラ７の外周面に内周面に接触させて
内ローラ９が固定されている。なお、１０は前記
入力軸１を支持する軸受、１１は前記出力軸３を
支持する軸受である。 In Fig. 2, the first shaft is a rotatable input shaft 1,
1 shows a conventional planetary roller type power transmission device in which the second shaft is a rotatable output shaft 3. A sun roller 2 is connected and fixed to the end of the input shaft 1, and a planet roller 7 is rotatably connected to each of a plurality of planet pins 5 fixed to the carrier 4 of the output shaft 3 via a needle bearing 6. While being supported in contact with the outer peripheral surface of the sun roller 2, an inner roller 9 is fixed to the casing 8 so as to contact the outer peripheral surface of the planetary roller 7 with its inner peripheral surface. Note that 10 is a bearing that supports the input shaft 1, and 11 is a bearing that supports the output shaft 3.
このような構造を有する装置において、前記内
ローラ９は、軸受鋼に焼入れを施して高硬度化さ
れた弾性部材からなる弾性ローラで、第３図ａに
示すように、遊星ローラ７との当接面９ｄを有す
る薄肉円筒部９ａと、入力軸１、出力軸３等の回
転軸の軸方向に区切つて二個形成された厚肉円筒
部９ｂと、前記薄肉円筒部９ａの両側端と個々の
厚肉円筒部９ｂとを接続する薄肉円板部９ｃとを
結合して構成される。前記二個の厚肉円筒部９ｂ
は回転軸である入力軸１、出力軸３の軸方向に比
較的厚肉に形成され、前記薄肉円筒部９ａの肉厚
t2は厚肉円筒部９ｂの肉厚t1の例えば約1/2以下
の薄肉に形成される。また、薄肉円板部９ｃは、
その肉厚t3を前記薄肉円筒部９ａの肉厚t2と同等
または若干厚肉（厚肉円筒部９ｂの肉厚t1よりも
はるかに薄肉）にされる。すなわち内ローラ９に
おいては、厚肉円筒部９ｂが薄肉円筒部９ａおよ
び薄肉円板部９ｃよりも剛性を有するように形成
される。また、自由状態における内ローラ９の内
径Diは、太陽ローラ２の外径Dsと遊星ローラ７
の外径Dpの２倍の和、すなわちDs＋2Dpよりもわ
ずかに大きく形成され、遊星ローラ７の組付けお
よび分解を容易にしている。 In the device having such a structure, the inner roller 9 is an elastic roller made of an elastic member made of hardened bearing steel, and is in contact with the planetary roller 7 as shown in FIG. 3a. A thin cylindrical portion 9a having a contact surface 9d, a thick cylindrical portion 9b formed in two parts separated in the axial direction of the rotating shaft such as the input shaft 1 and the output shaft 3, and two thick cylindrical portions 9b formed at both ends of the thin cylindrical portion 9a and each other. The thick cylindrical portion 9b and the thin disk portion 9c are connected to each other. The two thick-walled cylindrical portions 9b
is formed relatively thick in the axial direction of the input shaft 1 and the output shaft 3, which are rotating shafts, and the wall thickness of the thin cylindrical portion 9a is
The thickness t 2 is formed to be thin, for example, about 1/2 or less of the thickness t 1 of the thick cylindrical portion 9b. Further, the thin disk portion 9c is
Its wall thickness t 3 is made equal to or slightly thicker than the wall thickness t 2 of the thin-walled cylindrical portion 9a (much thinner than the wall thickness t 1 of the thick-walled cylindrical portion 9b). That is, in the inner roller 9, the thick cylindrical portion 9b is formed to have more rigidity than the thin cylindrical portion 9a and the thin disk portion 9c. In addition, the inner diameter Di of the inner roller 9 in the free state is the outer diameter D s of the sun roller 2 and the planetary roller 7.
It is formed slightly larger than the sum of twice the outer diameter D p of , that is, D s +2D p , to facilitate assembly and disassembly of the planetary roller 7.
上記構成を備えた動力伝達装置を組立てるに
は、ケーシング８内に太陽ローラ２および遊星ロ
ーラ７を組付けた後、内ローラ９を自由状態にて
挿入し、ケーシング８側にピン１２で止める。こ
の場合、前述のように、内ローラ９の内周面と遊
星ローラ７の外周面との間にはわずかな隙間が形
成されているので、内ローラ９は極めて容易に挿
入できる。内ローラ９の挿入後、該内ローラ９の
厚肉円筒部９ｂの側面とケースカバー１３との間
に後述する軸方向押付力Ｔを発生させるため、ボ
ルト１５を締めてケースカバー１３をケーシング
８に固着する。ボルト１５の締付けにより、ケー
スカバー１３の突出部１３ａを介して内ローラ９
は、第３図ｂに示すように、突出部１３ａの突出
量Ｚに対応した軸方向の押付力Ｔを受けて自由状
態における全幅WiがWtに縮小される。この全幅
WiのWtへの縮小により内径Diも縮小し、当接面
９ｄが遊星ローラ７の外周面と当接した後は半径
方向の変形が拘束されて、この拘束分に相当する
圧接力Ｐが発生し、該圧接力Ｐにより内ローラ９
と遊星ローラ７、遊星ローラ７と太陽ローラ２と
がそれぞれ圧接される。すなわち第３図ａ，ｂに
示すように、内ローラ９を自由状態から前記押付
力Ｔで圧縮すると、その全幅WiがWtに減少する
結果、内ローラ９の遊星ローラ７との当接面９ｄ
に半径をｒとするクラウニング変形が形成され
て、内径DiがDnに縮少される。このクラウニン
グ変形量ｅが遊星ローラ７によつて拘束されるこ
とにより、前記圧接力Ｐを発生させる。 To assemble the power transmission device having the above configuration, after assembling the sun roller 2 and the planetary rollers 7 into the casing 8, the inner roller 9 is inserted in a free state and fixed to the casing 8 side with a pin 12. In this case, as described above, since a slight gap is formed between the inner circumferential surface of the inner roller 9 and the outer circumferential surface of the planetary roller 7, the inner roller 9 can be inserted very easily. After inserting the inner roller 9, in order to generate an axial pressing force T, which will be described later, between the side surface of the thick cylindrical portion 9b of the inner roller 9 and the case cover 13, bolts 15 are tightened to move the case cover 13 to the casing 8. sticks to. By tightening the bolt 15, the inner roller 9 is inserted through the protrusion 13a of the case cover 13.
As shown in FIG. 3b, the total width W i in the free state is reduced to W t in response to an axial pressing force T corresponding to the protrusion amount Z of the protrusion 13a. This full width
Due to the reduction of W i to W t , the inner diameter D i is also reduced, and after the contact surface 9d contacts the outer peripheral surface of the planetary roller 7, the deformation in the radial direction is restrained, and the pressure contact force corresponding to this restraint is increased. P is generated, and the pressure contact force P causes the inner roller 9
and the planetary roller 7, and the planetary roller 7 and the sun roller 2 are brought into pressure contact with each other. That is, as shown in FIGS. 3a and 3b, when the inner roller 9 is compressed from the free state by the pressing force T, its total width W i decreases to W t , and as a result, the inner roller 9 comes into contact with the planetary roller 7. Surface 9d
A crowning deformation with radius r is formed at , and the inner diameter D i is reduced to D n . This crowning deformation amount e is restrained by the planetary roller 7, thereby generating the pressing force P.
〈考案が解決しようとする問題点〉
しかしながら、かかる基本構造を有する遊星ロ
ーラ式動力伝達装置においては、第４図に示すよ
うに、突出部１３ａの突出量に対応して、内ロー
ラ９の両側面には軸方向押付力Ｔが作用し、その
全幅はWiからWtに弾性変形するが、このとき、
内ローラ９の両側面は、WiからWtにその全幅が
減少した量に対応して角度θなる傾斜を伴う。こ
のため、内ローラ９を両側とケーシング８および
ケースカバー１３との接触部a1，a2では点接触
（円周上としては線接触）状態で軸方向押付力Ｔ
を支持することになる。そして、内ローラ９は高
硬度材で形成されていると共にケーシング８およ
びケースカバー１３は例えば安価且つ成形容易な
鋳鉄等の低硬度材で形成されているために、高い
面圧がかかるケーシング８のa1部やケースカバー
１３のa2部に摩耗が生ずる。この結果、運転中に
内ローラ９の全幅Wtが増加して軸方向押付力Ｔ
がこれに対応して減少し、動力伝達に必要なロー
ラ圧接力Ｐの不足を招くとともに、これによつて
運転中に動力伝達が不可能になつたり、動力伝達
容量の低下を招くという不都合を生じている。<Problems to be solved by the invention> However, in the planetary roller type power transmission device having such a basic structure, as shown in FIG. An axial pressing force T acts on the surface, and its total width is elastically deformed from W i to W t , but at this time,
Both side surfaces of the inner roller 9 are inclined at an angle θ corresponding to the amount by which the total width thereof decreases from W i to W t . Therefore, the axial pressing force T is applied when the inner roller 9 is in point contact (line contact on the circumference) at the contact areas a 1 and a 2 between both sides of the casing 8 and the case cover 13.
will support. Since the inner roller 9 is made of a high-hardness material, and the casing 8 and case cover 13 are made of a low-hardness material such as cast iron, which is inexpensive and easy to form, the casing 8 is subjected to a high surface pressure. Wear occurs on the a 1 part and the a 2 part of the case cover 13. As a result, the total width W t of the inner roller 9 increases during operation, and the axial pressing force T
corresponds to this, resulting in a shortage of the roller pressing force P necessary for power transmission, and this also causes the inconvenience that power transmission becomes impossible during operation or a reduction in power transmission capacity. It is occurring.
この対策としては、ケーシング８およびケース
カバー１３を内ローラ９と同等な硬度を有する材
料から形成すれば良いのであるが、ケーシング８
およびケースカバー１３の成形が困難となるばか
りか、コストも高くなり有効なる解決策ではなか
つた。 As a countermeasure against this, the casing 8 and the case cover 13 may be made of a material having the same hardness as the inner roller 9.
This not only makes it difficult to mold the case cover 13, but also increases the cost, which is not an effective solution.
本考案は上記従来の事情に鑑みなされたもの
で、内ローラによるケーシングおよびケースカバ
ーの摩耗を有効に防止した遊星ローラ式動力伝達
装置を提供することを目的とする。 The present invention was devised in view of the above-mentioned conventional circumstances, and it is an object of the present invention to provide a planetary roller type power transmission device that effectively prevents wear of the casing and case cover caused by the inner rollers.
〈問題点を解決するための手段〉
本考案に係る遊星ローラ式動力伝達装置は、第
１の軸に連結された太陽ローラと、ケーシングと
ケースカバーとの間に挟圧支持されることにより
弾性変形した環状の内ローラと、第２の軸に枢支
されると共に前記太陽ローラの外周面及び前記内
ローラの内周面にそれぞれ当接した複数の遊星ロ
ーラとを備えた遊星ローラ式動力伝達装置におい
て、前記内ローラを前記ケーシング及び前記ケー
スカバーより高硬度な弾性材から形成すると共
に、該内ローラと該ケーシング及び該ケースカバ
ーとの間に当該内ローラと同等な硬度を有する受
圧リングを介在させたことを特徴とする。<Means for Solving the Problems> The planetary roller type power transmission device according to the present invention has a sun roller connected to a first shaft, and is supported under pressure between a casing and a case cover, so that elasticity can be improved. A planetary roller type power transmission comprising a deformed annular inner roller and a plurality of planetary rollers that are pivotally supported on a second shaft and abut on the outer circumferential surface of the sun roller and the inner circumferential surface of the inner roller, respectively. In the device, the inner roller is formed from an elastic material having a higher hardness than the casing and the case cover, and a pressure receiving ring having the same hardness as the inner roller is provided between the inner roller and the casing and the case cover. It is characterized by intervening.
〈作用〉
内ローラへの押圧力により生ずる面圧を受圧リ
ングにより受け、これによつてケーシングおよび
ケースカバーにかかる面圧を低下させて内ローラ
によるケーシングおよびケースカバーの摩耗を防
止する。<Function> The surface pressure generated by the pressing force on the inner roller is received by the pressure receiving ring, thereby reducing the surface pressure applied to the casing and case cover, thereby preventing wear of the casing and case cover by the inner roller.
〈実施例〉
以下、本考案に係る遊星ローラ式動力伝達装置
の一実施例を図面に基づいて説明する。尚、従来
と同一部分には同一符号を付して重複する説明は
省略する。<Example> Hereinafter, one example of the planetary roller type power transmission device according to the present invention will be described based on the drawings. Incidentally, the same parts as in the prior art are given the same reference numerals, and redundant explanations will be omitted.
本実施例に係る遊星ローラ式動力伝達装置の上
半部を縦断面して表す第１図ａに示すように、内
ローラ９の両方の厚肉円筒部９ｂとケーシング８
およびケースカバー１３との間にはそれぞれ薄板
環状の受圧リング２１，２２が介在されている。
受圧リング２１，２２は内ローラ９と同等の硬度
を有する高硬度材、例えばHRC55以上の材料か
ら形成されており、内ローラ９との摩擦に対して
高い耐摩耗性を有している。尚、受圧リング２１
については第１図ｂに示すように、ピン１２が貫
通する孔２１ａがピン１２と同数設けられてい
る。 As shown in FIG. 1a, which is a vertical cross-sectional view of the upper half of the planetary roller type power transmission device according to this embodiment, both thick-walled cylindrical portions 9b of the inner roller 9 and the casing 8
Thin plate annular pressure receiving rings 21 and 22 are interposed between the case cover 13 and the case cover 13, respectively.
The pressure receiving rings 21 and 22 are made of a high hardness material having the same hardness as the inner roller 9, for example, a material with HRC55 or higher, and have high wear resistance against friction with the inner roller 9. In addition, the pressure receiving ring 21
As shown in FIG. 1B, the same number of holes 21a as the number of pins 12 are provided through which the pins 12 pass.
また、受圧リング２２を介在させることに伴な
つて、ケースカバー１３の突出部１３ａの突出量
Ｚはこの受圧リング２２の厚み分だけ小さく設定
されており、適正な押付力Ｔが内ローラ９に加わ
るようにしてある。 In addition, since the pressure receiving ring 22 is interposed, the protrusion amount Z of the protruding portion 13a of the case cover 13 is set to be smaller by the thickness of the pressure receiving ring 22, so that an appropriate pressing force T is applied to the inner roller 9. I've made it so that I can join.
上記構成の遊星ローラ式動力伝達装置によれ
ば、点接線状態となる接触部a1，a2で押付力Ｔを
支持する場合、押付力Ｔに起因してケーシング８
およびケースカガー１３に加わる面圧は受圧リン
グ２１，２２の面積に応じて低下される。従つ
て、鋳鉄等の低硬度材で形成されるケーシング８
およびケースカバー１３の摩耗が防止されて、押
付力Ｔの減少により動力伝達に必要なローラ圧接
力Ｐの不足が生じ、運転中に動力伝達が不可能に
なつたり、動力伝達容量が低下してしまつたりと
いう不都合が解決される。このため、ケーシング
８およびケースカバー１３は従来通り安価且つ成
形容易な低硬度材で形成できる。 According to the planetary roller type power transmission device having the above configuration, when the contact portions a 1 and a 2 in a point contact state support the pressing force T, the casing 8 due to the pressing force T
The surface pressure applied to the case cover 13 is reduced according to the area of the pressure receiving rings 21 and 22. Therefore, the casing 8 is made of a low hardness material such as cast iron.
And wear of the case cover 13 is prevented, and the roller pressing force P required for power transmission is insufficient due to the decrease in the pressing force T, which may make power transmission impossible or reduce the power transmission capacity during operation. The inconvenience of festivals is solved. Therefore, the casing 8 and the case cover 13 can be made of a low-hardness material that is inexpensive and easy to mold, as in the past.
尚、遊星ローラ式動力伝達装置からの動力の取
出し形式については上記に限定されることはな
く、入力軸と出力軸の設定形式に係わりなく本考
案を適用することができる。 Note that the method of extracting power from the planetary roller power transmission device is not limited to the above, and the present invention can be applied regardless of the setting method of the input shaft and the output shaft.
〈考案の効果〉
本考案によれば、内ローラによるケーシングお
よびケースカバーの摩耗を有効に防止することが
できるため、動力伝達装置の伝達容量低下等を懸
念することなくこれらケーシングやケースカバー
を安価且つ成形容易な低硬度材で成形することが
できる。<Effects of the invention> According to the invention, since it is possible to effectively prevent wear of the casing and case cover caused by the inner roller, these casings and case covers can be manufactured at low cost without worrying about a reduction in the transmission capacity of the power transmission device. In addition, it can be molded from a low hardness material that is easy to mold.
第１図ａ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、第１図ｂは受圧リング
の斜視図、第２図は従来の遊星ローラ式動力伝達
装置の断面図、第３図ａ，ｂはそれぞれ押付力付
与前および押付力付与時における内ローラを表す
半断面図、第４図は内ローラの弾性変形状態を示
す断面図である。
図面中、１は入力軸、２は太陽ローラ、３は出
力軸、７は遊星ローラ、８はケーシング、９は内
ローラ、１３はケースカバー、２１，２２は受圧
リングである。
FIG. 1a is a sectional view of a planetary roller type power transmission device according to an embodiment of the present invention, FIG. 1b is a perspective view of a pressure receiving ring, and FIG. 2 is a sectional view of a conventional planetary roller type power transmission device. FIGS. 3a and 3b are half-sectional views showing the inner roller before and during application of the pressing force, respectively, and FIG. 4 is a sectional view showing the elastically deformed state of the inner roller. In the drawings, 1 is an input shaft, 2 is a sun roller, 3 is an output shaft, 7 is a planetary roller, 8 is a casing, 9 is an inner roller, 13 is a case cover, and 21 and 22 are pressure receiving rings.
Claims (1)
グとケースカバーとの間に挟圧支持されることに
より弾性変形した環状の内ローラと、第２の軸に
枢支されると共に前記太陽ローラの外周面及び前
記内ローラの内周面にそれぞれ当接した複数の遊
星ローラとを備えた遊星ローラ式動力伝達装置に
おいて、前記内ローラを前記ケーシング及び前記
ケースカバーより高硬度な弾性材から形成すると
共に、該内ローラと該ケーシング及び該ケースカ
バーとの間に当該内ローラと同等な硬度を有する
受圧リングを介在させたことを特徴とする遊星ロ
ーラ式動力伝達装置。 A sun roller connected to a first shaft, an annular inner roller that is elastically deformed by being supported under pressure between a casing and a case cover, and a sun roller that is pivotally supported by a second shaft. In a planetary roller type power transmission device comprising a plurality of planetary rollers abutting an outer circumferential surface and an inner circumferential surface of the inner roller, respectively, the inner roller is formed from an elastic material having higher hardness than the casing and the case cover. A planetary roller type power transmission device characterized in that a pressure receiving ring having a hardness equivalent to that of the inner roller is interposed between the inner roller, the casing, and the case cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17658884U JPH0135013Y2 (en) | 1984-11-22 | 1984-11-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17658884U JPH0135013Y2 (en) | 1984-11-22 | 1984-11-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6191650U JPS6191650U (en) | 1986-06-13 |
| JPH0135013Y2 true JPH0135013Y2 (en) | 1989-10-25 |
Family
ID=30734185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17658884U Expired JPH0135013Y2 (en) | 1984-11-22 | 1984-11-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0135013Y2 (en) |
-
1984
- 1984-11-22 JP JP17658884U patent/JPH0135013Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6191650U (en) | 1986-06-13 |
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