JP2005325894A - Planetary roller screw device - Google Patents
Planetary roller screw device Download PDFInfo
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- JP2005325894A JP2005325894A JP2004143672A JP2004143672A JP2005325894A JP 2005325894 A JP2005325894 A JP 2005325894A JP 2004143672 A JP2004143672 A JP 2004143672A JP 2004143672 A JP2004143672 A JP 2004143672A JP 2005325894 A JP2005325894 A JP 2005325894A
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Abstract
Description
本発明は、射出成形機やプレス成形機等の機械装置の送り機構や自動車用アクチュエータ等に用いられる遊星ローラネジ装置に関する。 The present invention relates to a planetary roller screw device used for a feed mechanism of a mechanical device such as an injection molding machine or a press molding machine, an automobile actuator, or the like.
従来の遊星ローラネジ装置は、外周面に軸ネジを形成したネジ軸と内周面にナットネジを形成したナットとの間にこれらのネジと噛合うローラネジを有する複数の遊星ローラを保持器に保持させて配置し、遊星ローラの両側に設けた平歯車を有する遊星ピニオンギヤをナットに設けたリングギヤに噛合わせて遊星ローラをネジ軸周りに円滑に自転させながら公転させている（例えば、特許文献１参照。）。
しかしながら、上述した従来の技術においては、遊星ローラの両側に設けた平歯車を有する遊星ピニオンギヤをナットに設けた内歯の平歯車を有するリングギヤに噛合わせて遊星ローラがネジ軸周りに自転しながら公転しているため、遊星ローラの回転により同時に噛合う平歯車の歯数が変化することに伴ってその噛合長さが変化し、この変化に起因する噛合音により騒音や振動が増大するという問題がある。 However, in the above-described conventional technology, the planetary pinion gear having the spur gear provided on both sides of the planetary roller meshes with the ring gear having the internal spur gear provided on the nut, and the planetary roller rotates around the screw shaft. Due to the revolution, the meshing length changes as the number of teeth of the spur gear meshing simultaneously with the rotation of the planetary roller changes, and the noise and vibration increase due to the meshing sound resulting from this change. There is.
このことは、特に遊星ローラネジ装置の高速回転時において重要である。
本発明は、上記の問題点を解決するためになされたもので、遊星ローラネジ装置の騒音や振動を低減する手段を提供することを目的とする。
This is particularly important when the planetary roller screw device rotates at high speed.
The present invention has been made to solve the above-described problems, and an object thereof is to provide means for reducing noise and vibration of a planetary roller screw device.
本発明は、上記課題を解決するために、外周面に軸ネジを形成したネジ軸と、内周面にナットネジを形成した円筒状のナットと、前記軸ネジと前記ナットネジとに噛合うローラネジを外周面に有し、前記ネジ軸とナットとの間を自転しながら公転する遊星ローラとを備えた遊星ローラネジ装置において、前記遊星ローラの両側に、はすば歯車を形成した遊星ピニオンギヤを設けると共に、該遊星ピニオンギヤが噛合うリングギヤを前記ナットに設けたことを特徴とする。 In order to solve the above problems, the present invention includes a screw shaft having a shaft screw formed on an outer peripheral surface, a cylindrical nut having a nut screw formed on an inner peripheral surface, and a roller screw meshing with the shaft screw and the nut screw. In a planetary roller screw device comprising a planetary roller having an outer peripheral surface and revolving while rotating between the screw shaft and the nut, planetary pinion gears having helical gears are provided on both sides of the planetary roller. A ring gear that meshes with the planetary pinion gear is provided on the nut.
これにより、本発明は、遊星ローラの回転に伴う歯車の歯の噛合長さの変化を少なくすることができ、これに起因する噛合音を低減して遊星ローラネジ装置の騒音や振動の低減を図ることができるという効果が得られる。 As a result, the present invention can reduce the change in the meshing length of the gear teeth due to the rotation of the planetary roller, and reduce the meshing noise caused by this to reduce the noise and vibration of the planetary roller screw device. The effect that it can be obtained.
以下に、図面を参照して本発明による遊星ローラネジ装置の実施例について説明する。 Embodiments of a planetary roller screw device according to the present invention will be described below with reference to the drawings.
図１は実施例１の遊星ローラネジ装置を示す側方断面図である。
図１において、１は遊星ローラネジ装置である。
２は遊星ローラネジ装置１のネジ軸であり、合金鋼等の鋼材で製作された棒状部材であって、その外周面には軸ネジ３が所定のピッチＰおよびリードで螺旋状に形成されている。
FIG. 1 is a side sectional view showing a planetary roller screw device according to a first embodiment.
In FIG. 1, reference numeral 1 denotes a planetary roller screw device.
Reference numeral 2 denotes a screw shaft of the planetary roller screw device 1, which is a rod-shaped member made of a steel material such as alloy steel. A shaft screw 3 is formed in a spiral shape with a predetermined pitch P and leads on the outer peripheral surface thereof. .
４は遊星ローラネジ装置１のナットであり、合金鋼の鋼材で製作された円筒状部材であって、その内周面には多条のナットネジ５が軸ネジ３と同じピッチＰで形成されている。
６は遊星ローラであり、合金鋼等の鋼材で製作された棒状部材であって、両端部に円柱状の軸部７が形成されており、両側の軸部７の内側に隣接して遊星ローラ６と同軸にはすば歯車を形成した遊星ピニオンギヤ８が設けられており、これらの遊星ピニオンギヤ８の間の外周面には軸ネジ３とナットネジ５とに嵌合するローラネジ９が軸ネジ３と同じピッチＰで形成されている。
Reference numeral 4 denotes a nut of the planetary roller screw device 1, which is a cylindrical member made of a steel material of alloy steel, and multiple nut screws 5 are formed at the same pitch P as the shaft screw 3 on the inner peripheral surface thereof. .
Reference numeral 6 denotes a planetary roller, which is a rod-shaped member made of a steel material such as alloy steel, and is formed with cylindrical shaft portions 7 at both ends, and is adjacent to the inner sides of the shaft portions 7 on both sides. A planetary pinion gear 8 formed with a helical gear is provided coaxially with the shaft 6. A roller screw 9 fitted to the shaft screw 3 and the nut screw 5 is provided on the outer peripheral surface between the planetary pinion gears 8 and the shaft screw 3. They are formed with the same pitch P.
１０は保持器であり、樹脂材料や金属材料で製作された円環状部材であって、遊星ローラ６の軸部７が嵌合する嵌合孔が所定の角度ピッチで複数設けられており、遊星ローラ６の軸部７を嵌合孔で保持してネジ軸２とナット４の間に複数の遊星ローラ６を所定の角度ピッチで配置する。
１１はリングギヤであり、保持器１０に保持された小径のはすば歯車である遊星ピニオンギヤ８に噛合う内歯のはすば歯車であって、ナット４の内周面に圧入等により固定されており、遊星ピニオンギヤ８がリングギヤ１１に噛合うことにより遊星ローラ６を一定の速度で公転させる。
Reference numeral 10 denotes a cage, which is an annular member made of a resin material or a metal material, and has a plurality of fitting holes with predetermined angular pitches into which the shaft portion 7 of the planetary roller 6 is fitted. The shaft portion 7 of the roller 6 is held by the fitting hole, and a plurality of planetary rollers 6 are arranged between the screw shaft 2 and the nut 4 at a predetermined angular pitch.
Reference numeral 11 denotes a ring gear, which is an internal helical gear that meshes with the planetary pinion gear 8 that is a small-diameter helical gear held by the cage 10 and is fixed to the inner peripheral surface of the nut 4 by press-fitting or the like. The planetary pinion gear 8 meshes with the ring gear 11 to cause the planetary roller 6 to revolve at a constant speed.
リングギヤ１１と遊星ピニオンギヤ８とのギヤ比は、ナット４のナットネジ５の噛合ピッチ円直径と遊星ローラ６のローラネジ９の噛合ピッチ円直径との比と同一となるように設定される。これにより同じ回転速度で回転する遊星ローラ６のローラネジ９と遊星ピニオンギヤ８の回転の整合性を担保することが可能になる。
また、両側の遊星ピニオンギヤ８のはすば歯車の歯の捩れ方向は、図１に示すように互いに逆方向として背面配置となるように形成されており、はすば歯車である遊星ピニオンギヤ８とリングギヤ１１とが噛合って回転することにより発生する軸方向の力を相殺して遊星ローラ６が軸方向に移動することを防止している。
The gear ratio between the ring gear 11 and the planetary pinion gear 8 is set to be the same as the ratio between the meshing pitch circle diameter of the nut screw 5 of the nut 4 and the meshing pitch circle diameter of the roller screw 9 of the planetary roller 6. Thereby, it becomes possible to ensure the consistency of the rotation of the planetary pinion gear 8 and the roller screw 9 of the planetary roller 6 rotating at the same rotational speed.
Further, as shown in FIG. 1, the torsional directions of the helical gear teeth of the planetary pinion gears 8 on both sides are opposite to each other and are arranged in the back, and the planetary pinion gears 8 that are helical gears The planetary roller 6 is prevented from moving in the axial direction by offsetting the axial force generated by the meshing rotation with the ring gear 11.
なお、捩れ方向は、それぞれを反対方向とした正面配置としても同様である。
また、両側のはすば歯車の歯の幅方向の一端の円周方向の取付角度位置をそれぞれ同位相となるように設定すれば、はすば歯車である遊星ローラの遊星ピニオンギヤを一つのリングギヤに容易に噛合わせることができ、遊星ローラネジ装置の組立性を向上させることができる。
In addition, the twist direction is the same as a front arrangement in which the directions are opposite to each other.
In addition, if the mounting angle positions in the circumferential direction of one end in the width direction of the helical gear teeth on both sides are set to be in phase, the planetary pinion gear of the planetary roller, which is a helical gear, is combined into one ring gear. Can be easily meshed with each other, and the assemblability of the planetary roller screw device can be improved.
上記のネジ軸２の軸ネジ３とナット４のナットネジ５とに、保持器１０に保持されてリングギヤ１１と遊星ピニオンギヤ８により公転を案内された遊星ローラ６のローラネジ９が嵌合し、ナット４を回転させることによって遊星ローラ６がネジ軸２の周りを自転しながら公転してネジ軸２を軸方向に移動させる。これによりナット４の回転運動がネジ軸２の直線運動に変換される。 The roller screw 9 of the planetary roller 6 held by the cage 10 and guided to revolve by the ring gear 11 and the planetary pinion gear 8 is fitted to the shaft screw 3 of the screw shaft 2 and the nut screw 5 of the nut 4. , The planetary roller 6 revolves around the screw shaft 2 and revolves to move the screw shaft 2 in the axial direction. Thereby, the rotational motion of the nut 4 is converted into the linear motion of the screw shaft 2.
上記のような構成において、ナット４を回転させると、ナットネジ５とローラネジ９のピッチＰが等しく、遊星ローラ６の両側の遊星ピニオンギヤ８とリングギヤ１１に形成されたはすば歯車により遊星ローラ６の自転と公転が正確に案内され、はすば歯車により同時に噛合う歯数の変化が少なくなり、その噛合長さの変化が少なくなってこれに起因する噛合音を低減することが可能になる。 In the configuration as described above, when the nut 4 is rotated, the pitch P between the nut screw 5 and the roller screw 9 is equal, and the planetary pinion gear 8 on both sides of the planetary roller 6 and the helical gears formed on the ring gear 11 cause the planetary roller 6 to rotate. The rotation and revolution are accurately guided, the change in the number of teeth simultaneously engaged by the helical gear is reduced, the change in the engagement length is reduced, and the engagement noise caused by this can be reduced.
この場合に、はすば歯車の歯を、幅方向の一端が隣の歯の他端と重なり合うように形成、つまり歯の他端が３６０／歯数で求められる角度以上捩れるように形成すれば、遊星ピニオンギヤ８の回転に伴う噛合長さを一定にすることができ、上記の噛合音を更に低減することができる。
以上説明したように、本実施例では、遊星ローラの両側に設けたはすば歯車を形成した遊星ピニオンギヤをナットに設けたリングギヤに噛合わせるようにしたことによって、遊星ローラの回転に伴う歯車の歯の噛合長さの変化を少なくすることができ、これに起因する噛合音を低減して遊星ローラネジ装置の騒音や振動の低減を図ることができる。
In this case, the tooth of the helical gear is formed so that one end in the width direction overlaps the other end of the adjacent tooth, that is, the other end of the tooth is formed to be twisted more than the angle required by 360 / the number of teeth. For example, the meshing length associated with the rotation of the planetary pinion gear 8 can be made constant, and the above-mentioned meshing noise can be further reduced.
As described above, in this embodiment, the planetary pinion gear formed with the helical gear provided on both sides of the planetary roller is meshed with the ring gear provided on the nut, so that the gear of the gear accompanying the rotation of the planetary roller is obtained. The change in the meshing length of the teeth can be reduced, and the meshing noise resulting from this can be reduced, and the noise and vibration of the planetary roller screw device can be reduced.
また、両側の遊星ピニオンギヤのはすば歯車の歯の位相を同位相にしたことによって、はすば歯車である遊星ローラの遊星ピニオンギヤを一つのリングギヤに容易に噛合わせることができ、遊星ローラネジ装置の組立性を向上させることができる。
なお、遊星ローラの両側に設けるはすば歯車は、互いに捩れ方向を逆方向とした背面配置または正面配置に形成するとして説明したが、図２に示す他の態様のように捩れ方向を同方向とした並行配置としても上記と同様の効果を得ることができる。
Also, by making the phase of the helical gear teeth of the planetary pinion gears on both sides the same phase, the planetary pinion gear of the planetary roller which is a helical gear can be easily meshed with one ring gear, and the planetary roller screw device Assembling property can be improved.
Note that the helical gears provided on both sides of the planetary roller have been described as being formed in a rear arrangement or a front arrangement in which the directions of twisting are opposite to each other. However, as in the other embodiment shown in FIG. The same effects as described above can be obtained even with the parallel arrangement.
本実施例においては、遊星ローラネジ装置のナットを回転させてネジ軸を軸方向に移動させるとして説明したが、ネジ軸を回転させてナットを移動させる形式の遊星ローラネジ装置に本発明を適用しても同様の効果を奏することができる。 In this embodiment, the nut of the planetary roller screw device is rotated and the screw shaft is moved in the axial direction. However, the present invention is applied to a planetary roller screw device of a type that rotates the screw shaft and moves the nut. Can achieve the same effect.
１ 遊星ローラネジ装置
２ ネジ軸
３ 軸ネジ
４ ナット
５ ナットネジ
６ 遊星ローラ
７ 軸部
８ 遊星ピニオンギヤ
９ ローラネジ
１０ 保持器
１０ａ 嵌合穴
１１ リングギヤ
DESCRIPTION OF SYMBOLS 1 Planetary roller screw apparatus 2 Screw shaft 3 Shaft screw 4 Nut 5 Nut screw 6 Planetary roller 7 Shaft part 8 Planetary pinion gear 9 Roller screw 10 Cage 10a Fitting hole 11 Ring gear
Claims (2)
前記遊星ローラの両側に、はすば歯車を形成した遊星ピニオンギヤを設けると共に、該遊星ピニオンギヤが噛合うリングギヤを前記ナットに設けたことを特徴とする遊星ローラネジ装置。 A screw shaft having a shaft screw formed on the outer peripheral surface; a cylindrical nut having a nut screw formed on the inner peripheral surface; and a roller screw meshing with the shaft screw and the nut screw on the outer peripheral surface, the screw shaft and the nut In a planetary roller screw device provided with a planetary roller that revolves while rotating between
A planetary roller screw device in which a planetary pinion gear having a helical gear is provided on both sides of the planetary roller, and a ring gear that meshes with the planetary pinion gear is provided on the nut.
前記両側の遊星ピニオンギヤのはすば歯車の歯の位相を同位相にしたことを特徴とする遊星ローラネジ装置。 In claim 1,
A planetary roller screw device characterized in that the phases of the helical gear teeth of the planetary pinion gears on both sides are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004143672A JP2005325894A (en) | 2004-05-13 | 2004-05-13 | Planetary roller screw device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004143672A JP2005325894A (en) | 2004-05-13 | 2004-05-13 | Planetary roller screw device |
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| Publication Number | Publication Date |
|---|---|
| JP2005325894A true JP2005325894A (en) | 2005-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2004143672A Pending JP2005325894A (en) | 2004-05-13 | 2004-05-13 | Planetary roller screw device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008015854A1 (en) * | 2006-08-03 | 2008-02-07 | Toyota Jidosha Kabushiki Kaisha | Method of producing mechanism for converting rotational motion into linear motion |
| US8162794B2 (en) | 2006-06-22 | 2012-04-24 | Toyota Jidosha Kabushiki Kaisha | Mechanism for converting rotational motion into linear motion |
| US8220132B2 (en) | 2006-06-22 | 2012-07-17 | Toyota Jidosha Kabushiki Kaisha | Method of producing mechanism for converting rotational motion to linear motion and jig for executing the method |
| CN108351004A (en) * | 2015-11-13 | 2018-07-31 | 舍弗勒技术股份两合公司 | Actuator |
| CN113167367A (en) * | 2018-11-08 | 2021-07-23 | 福利·阿伯维 | Planetary roller screw mechanism |
-
2004
- 2004-05-13 JP JP2004143672A patent/JP2005325894A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8162794B2 (en) | 2006-06-22 | 2012-04-24 | Toyota Jidosha Kabushiki Kaisha | Mechanism for converting rotational motion into linear motion |
| US8220132B2 (en) | 2006-06-22 | 2012-07-17 | Toyota Jidosha Kabushiki Kaisha | Method of producing mechanism for converting rotational motion to linear motion and jig for executing the method |
| US8800127B2 (en) | 2006-06-22 | 2014-08-12 | Toyota Jidosha Kabushiki Kaisha | Method of producing mechanism for converting rotational motion to linear motion and jig for executing the method |
| US9279484B2 (en) | 2006-06-22 | 2016-03-08 | Toyota Jidosha Kabushiki Kaisha | Method of producing mechanism for converting rotational motion to linear motion and jig for executing the method |
| US9423010B2 (en) | 2006-06-22 | 2016-08-23 | Toyota Jidosha Kabushiki Kaisha | Method of producing mechanism for converting rotational motion to linear motion and jig for executing the method |
| WO2008015854A1 (en) * | 2006-08-03 | 2008-02-07 | Toyota Jidosha Kabushiki Kaisha | Method of producing mechanism for converting rotational motion into linear motion |
| US8037606B2 (en) | 2006-08-03 | 2011-10-18 | Toyota Jidosha Kabushiki Kaisha | Method of producing mechanism for converting rotational motion into linear motion |
| CN108351004A (en) * | 2015-11-13 | 2018-07-31 | 舍弗勒技术股份两合公司 | Actuator |
| CN113167367A (en) * | 2018-11-08 | 2021-07-23 | 福利·阿伯维 | Planetary roller screw mechanism |
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