JPH0611432Y2 - Multi-stage telescopic drive device with feed screw - Google Patents
Multi-stage telescopic drive device with feed screwInfo
- Publication number
- JPH0611432Y2 JPH0611432Y2 JP3260189U JP3260189U JPH0611432Y2 JP H0611432 Y2 JPH0611432 Y2 JP H0611432Y2 JP 3260189 U JP3260189 U JP 3260189U JP 3260189 U JP3260189 U JP 3260189U JP H0611432 Y2 JPH0611432 Y2 JP H0611432Y2
- Authority
- JP
- Japan
- Prior art keywords
- nut
- cylinder
- stage
- hollow
- hollow screw
- 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
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- Transmission Devices (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は、伸縮比の大きい多重筒による多段伸縮装置に
関する。DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a multi-stage telescopic device using multiple cylinders having a large telescopic ratio.
従来の技術 従来の送りねじによる多段伸縮駆動装置は、例えば、実
公昭６１−１４７６０号公報並びに特公昭６１−２２１
９０号公報に開示されているように、駆動ねじ軸の回転
トルクを順次多段伸縮筒に伝達するための構造が軸方向
に作用する緊締圧接力に依存していた。すなわち、上記
従来例のトルク伝達構造を第５図に示すと、 駆動ねじ軸Ｓの外周に螺合するナット部Ｎを有する第１
段の廻り止めされた中空ねじ筒Ａは、駆動ねじ軸Ｓの回
動により図において右方に螺進し、該第１段の中空ねじ
筒Ａのナット部Ｎに形成した内周段部の軸方向と直交す
る被動面Ｆが、駆動ねじ軸Ｓの先端部外周段部に形成し
た軸方向と直交する駆動面Ｄに緊締圧接されると、前記
第１段の中空ねじ筒Ａの螺進が停止するとともに、該中
空ねじ筒Ａは駆動ねじ軸Ｓと一体になって回動し、第１
段の中空ねじ筒Ａの外周に刻設した送りねじに螺合する
ナット部Ｎ′を有する廻り止めされた第２段の中空ねじ
筒Ｂを右方へ螺進させ、以下多段に挿通した多数の中空
ねじ筒を同様に順次伸長させ、また、縮少時には伸長時
の逆操作さして逆作動させることにより多段中空ねじ筒
の伸縮作動を行わせている。2. Description of the Related Art A conventional multistage expansion / contraction drive device using a feed screw is disclosed in, for example, Japanese Utility Model Publication No. 61-14760 and Japanese Patent Publication No. 61-221.
As disclosed in Japanese Patent Publication No. 90, the structure for sequentially transmitting the rotational torque of the drive screw shaft to the multistage telescopic cylinder depends on the tightening pressure contact force acting in the axial direction. That is, when the torque transmission structure of the above-mentioned conventional example is shown in FIG. 5, the first portion having the nut portion N screwed onto the outer periphery of the drive screw shaft S is shown.
The hollow screw cylinder A, which is prevented from rotating in the step, is screwed to the right in the figure by the rotation of the drive screw shaft S, and the inner peripheral step portion formed in the nut portion N of the hollow screw cylinder A in the first stage is rotated. When the driven surface F, which is orthogonal to the axial direction, is brought into tight contact with the drive surface D, which is formed on the outer peripheral step portion of the tip portion of the drive screw shaft S, and which is orthogonal to the axial direction, the first stage hollow screw cylinder A is screwed. And the hollow screw cylinder A rotates together with the drive screw shaft S,
The second stage hollow threaded cylinder B, which has a nut portion N'to be screwed into the feed screw engraved on the outer periphery of the multi-staged hollow threaded cylinder A, is screwed to the right and is then inserted in multiple stages. In the same manner, the hollow screw cylinders of No. 3 are sequentially expanded, and when the hollow screw cylinders are contracted, the multistage hollow screw cylinders are expanded and contracted by performing the reverse operation by performing the reverse operation at the time of expansion.
考案が解決しようとする課題 上述した従来例においては、駆動ねじ軸Ｓから第１段の
中空ねじ筒Ａへ、また、第１段中空ねじ筒Ａから第２段
の中空ねじ筒Ｂへ、と順次駆動ねじ軸Ｓの回転トルクを
伝達する面は、軸方向と直交する被動面Ｆおよび駆動面
Ｄとの軸方向への緊締圧接力による両面ＦおよびＤの一
体化に依存している。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-mentioned conventional example, from the drive screw shaft S to the first-stage hollow screw cylinder A, and from the first-stage hollow screw cylinder A to the second-stage hollow screw cylinder B, The surface of the drive screw shaft S for transmitting the rotational torque depends on the integration of the driven surface F and the drive surface D, which are orthogonal to the axial direction, by the tightening pressure contact force in the axial direction.
したがって、夫々の各段における上記緊締圧接力は最終
段において積算されて送りねじに過大な面圧を作用させ
る結果になり、被動面Ｆおよび駆動面Ｄの亀裂、破壊等
のおそれを生じ、また、各筒の縮少作動時においては、
被動面Ｆと駆動面Ｄとの圧接緊締力が離反抵抗となっ
て、各筒の縮少作動を軽快円滑化を阻害するという欠点
を有していた。Therefore, the tightening pressure contact force in each step is integrated in the final step, resulting in an excessive surface pressure acting on the feed screw, which may cause cracks or breaks in the driven surface F and the driving surface D. , At the time of reduction operation of each cylinder,
The pressure contact tightening force between the driven surface F and the drive surface D acts as a separation resistance, which hinders the smoothing of the reduction operation of each cylinder.
課題を解決するための手段 本考案は上述した従来技術の欠点を除去するため、駆動
ねじ軸の回転トルクを伝達する前記被動面と駆動面とを
軸方向に平行な回転噛合面として軸方向の面圧の増大を
防止したものである。Means for Solving the Problems In order to eliminate the above-mentioned drawbacks of the prior art, the present invention has an axial direction in which the driven surface for transmitting the rotational torque of the drive screw shaft and the drive surface are axially parallel to each other as a rotational meshing surface. This is to prevent an increase in surface pressure.
作用 駆動ねじ軸の回動によって夫々の中空ねじ筒が順次伸長
する際に、各中空ねじ筒の伸長端において軸方向に平行
な噛合面が互いに係合して回転トルクを伝達するから、
噛合面相互の圧接力は軸方向ではなく周方向に作用し、
各噛合面の圧接力が軸方向に積算されることはない。When the respective hollow screw cylinders are sequentially expanded by the rotation of the drive screw shaft, the meshing surfaces parallel to the axial direction engage with each other at the extending end of each hollow screw cylinder to transmit the rotational torque,
The pressure contact force between the meshing surfaces acts not in the axial direction but in the circumferential direction,
The pressure contact force of each meshing surface is not integrated in the axial direction.
実施例 第１図、第２図は夫々本考案の実施例を示す３段伸縮の
縮少時、伸長時の正面断面図であって、駆動ねじ軸１は
駆動ウオーム２によって駆動されるウオームホイール３
を固着しており、駆動ねじ軸１の外周に刻設した送りね
じ４に螺合する第１のナット５ａには駆動ねじ軸１に外
嵌する第１の中空ねじ筒６ａが固着され、該第１の中空
ねじ筒６ａの外周に刻設した送りねじに螺合する第２の
ナット５ｂには、第１の中空ねじ筒６ａに外嵌する第２
の中空ねじ筒６ｂが固着され、更に、第２の中空ねじ筒
６ｂの外周に刻設した送りねじに螺合する第３のナット
５ｃには、第２の中空ねじ筒６ｂに外嵌する第３の中空
筒６ｃが固着され、該第３の中空筒６ｃの先端部には図
示しない被動体の取付けフランジ７が固着されている。Embodiment FIG. 1 and FIG. 2 are front cross-sectional views showing the embodiment of the present invention at the time of contraction and extension of three-stage expansion and contraction, respectively, in which a drive screw shaft 1 is driven by a drive worm 2. Three
The first hollow screw cylinder 6a fitted onto the drive screw shaft 1 is fixed to the first nut 5a screwed onto the feed screw 4 formed on the outer periphery of the drive screw shaft 1, The second nut 5b screwed to the feed screw engraved on the outer periphery of the first hollow screw cylinder 6a is fitted with the second nut 5b which is fitted onto the first hollow screw cylinder 6a.
Of the second hollow screw cylinder 6b is fixed to the second hollow screw cylinder 6b, and the third nut 5c screwed to the feed screw engraved on the outer periphery of the second hollow screw cylinder 6b is fitted to the second hollow screw cylinder 6b. Three hollow cylinders 6c are fixed, and a mounting flange 7 of a driven body (not shown) is fixed to the tip of the third hollow cylinder 6c.
そして、駆動ねじ軸１の先端部外周、第１の中空ねじ筒
６ａおよび第２の中空ねじ筒６ｂの夫々の先端外周に
は、第３図に示すような伸長用の駆動歯８、８ａ、８ｂ
が直径上に突設され、また、第１のナット５ａ、第２の
ナット５ｂおよび第３のナット５ｃの夫々の先端部には
前記夫々の駆動歯８、８ａ、８ｂに係合する被動歯９、
９ａ、９ｂが直径上に突設されており、駆動歯８、８
ａ、８ｂの噛合面８′、８′、８′は軸方向に平行な係
合面を形成し、同様に被動歯９、９ａ、９ｂの噛合面
９′、９′、９′も軸方向に平行な係合面を形成してい
る。The drive teeth 8, 8a for extension as shown in FIG. 3 are provided on the outer periphery of the tip end of the drive screw shaft 1 and the outer periphery of the tip of each of the first hollow screw cylinder 6a and the second hollow screw cylinder 6b. 8b
Of the first nut 5a, the second nut 5b, and the third nut 5c are engaged with the driving teeth 8, 8a, 8b. 9,
9a and 9b are projected on the diameter, and drive teeth 8 and 8
The meshing surfaces 8 ', 8', 8'of a, 8b form an engaging surface parallel to the axial direction, and similarly, the meshing surfaces 9 ', 9', 9'of the driven teeth 9, 9a, 9b are also in the axial direction. To form an engaging surface parallel to.
したがって、第４図において、駆動ねじ軸１の定位置回
転によって回転拘束（第３の中間筒６ｃが被動体に取付
けられて回転しないから、一般には第１〜２の中空ねじ
筒６ａ、６ｂも自由回転が拘束される）されている第１
図のナット５ａおよび第１の中空ねじ筒６ａが第２図の
如く右方に伸長前進して該ナット５ａの被動歯９の噛合
面９′が駆動歯８の駆動面８′に係合すると、第１の中
空ねじ筒６ａは駆動ねじ軸１と一体になって回動せしめ
られる。Therefore, in FIG. 4, the drive screw shaft 1 is rotationally constrained by the fixed position rotation (since the third intermediate cylinder 6c is attached to the driven body and does not rotate, the first and second hollow screw cylinders 6a and 6b are also generally locked. Free rotation is constrained) 1st
When the nut 5a and the first hollow screw cylinder 6a shown in the figure extend and advance to the right as shown in FIG. 2 and the meshing surface 9'of the driven tooth 9 of the nut 5a engages with the driving surface 8'of the driving tooth 8. The first hollow screw cylinder 6a is rotated integrally with the drive screw shaft 1.
すなわち、本考案は前述した従来例の如く、第１のナッ
トの被動面Ｆが駆動ねじ軸端の駆動面Ｄに緊締圧接し、
軸方向の圧接緊締力により一体化して回転トルクを伝達
するのではなく、緊締圧接前に噛合面が相互に噛合し円
周方向の係合により回転トルクを伝達するものである。That is, in the present invention, as in the above-mentioned conventional example, the driven surface F of the first nut is brought into tight contact with the driving surface D at the end of the driving screw shaft,
The rotating torque is not integrally transmitted by the axial pressure contact tightening force, but the engaging surfaces are engaged with each other before the tightening pressure contact and the rotating torque is transmitted by the circumferential engagement.
以下、第２の中空ねじ筒６ｂおよび第３の中空筒６ｃに
ついても同様にして第２図に示す如く伸長作動する。Thereafter, the second hollow screw cylinder 6b and the third hollow cylinder 6c are similarly extended as shown in FIG.
次に、縮少作動時について説明すると、駆動ねじ軸１の
逆回転によって噛合面８′、９′の係合が外れ、第１の
ナット５ａの回動が拘束されているので第１の中空ねじ
筒６ａが後退し、第１のナット５ａの後端部に形成した
フランジ部の後面に突設した縮少用被動歯１０が駆動ね
じ軸１の基端外周に突設した縮少用駆動歯１１に係合す
ると、第１のナット５ａは駆動ねじ軸１とともに逆回転
して第２の中空ねじ筒６ｂを後退させ、第２のナット５
ｂのフランジ部の後面に突設した被動歯１０ａが第１の
ナット５ａのフランジ部の前面に突設した駆動歯１１ａ
に係合すると、第２の中空ねじ筒６ｂが回動して第３の
中空筒６ｃを後退させるものである。Next, the reduction operation will be described. The reverse rotation of the drive screw shaft 1 disengages the meshing surfaces 8'and 9'and the rotation of the first nut 5a is restricted. The screw drive cylinder 6a is retracted, and the reduction driven teeth 10 projecting on the rear surface of the flange formed on the rear end of the first nut 5a project on the outer periphery of the base end of the drive screw shaft 1. When engaged with the teeth 11, the first nut 5a reversely rotates together with the drive screw shaft 1 to retract the second hollow screw cylinder 6b, and the second nut 5a
The driven tooth 10a protruding from the rear surface of the flange portion of b is the driving tooth 11a protruding from the front surface of the flange portion of the first nut 5a.
When engaged with, the second hollow screw cylinder 6b rotates to retract the third hollow cylinder 6c.
考案の効果 本考案は、圧縮荷重負荷方向、一般には伸長方向におけ
る多段各筒の回転トルク伝達面が駆動歯、被動歯の夫々
に形成した軸方向に平行な噛合面であるので、トルク伝
達負荷は伸縮各段の中空筒の円周方向に作用し軸方向に
積算されることがないから、回転トルク伝達面における
過大負荷が回避されてトルク伝達部位の異常発熱、異常
摩擦、損傷等のおそれなく、また、縮少時における各筒
のトルク伝達面の解離が容易且つ円滑に行われ、伸縮作
動時の捩れ振動或いは揺れ等がなく、耐用寿命も増大す
る等の効果を有している。Effect of the Invention In the present invention, since the rotational torque transmitting surface of each multistage cylinder in the compressive load applying direction, generally the extending direction, is the meshing surface formed on the drive tooth and the driven tooth and parallel to the axial direction, the torque transmitting load is achieved. Since it acts in the circumferential direction of the hollow cylinder at each stage of expansion and contraction and is not integrated in the axial direction, overload on the rotational torque transmission surface is avoided and abnormal heat generation, abnormal friction, damage, etc. at the torque transmission part may occur. In addition, the torque transmission surfaces of the respective cylinders can be easily and smoothly disengaged at the time of reduction, there is no torsional vibration or shaking during the expansion and contraction operation, and the useful life is increased.
第１図乃至第４図は本考案の３段伸縮の実施例を示し、
第１図は縮少時の断面図、第２図は伸長時の断面図、第
３図は駆動歯の拡大斜視図、第４図は駆動ねじ軸と第１
のナットの噛合説明図、第５図は従来例の伸長時断面図
である。 １……駆動ねじ軸 ４……送りねじ 5a,5b,5c……ナット 6a,6b……中空ねじ筒 6c……中空筒 8,8a,8b,11,11a……駆動歯 9,9a,9b,10,10a……被動歯 ８′，９′……噛合面1 to 4 show a three-stage telescopic embodiment of the present invention,
FIG. 1 is a sectional view when contracted, FIG. 2 is a sectional view when expanded, FIG. 3 is an enlarged perspective view of drive teeth, and FIG. 4 is a drive screw shaft and first.
FIG. 5 is an explanatory view of the engagement of the nut of FIG. 5, and FIG. 5 is a sectional view of the conventional example at the time of extension. 1 …… Drive screw shaft 4 …… Feed screw 5a, 5b, 5c …… Nut 6a, 6b …… Hollow screw cylinder 6c …… Hollow cylinder 8,8a, 8b, 11,11a …… Drive teeth 9,9a, 9b , 10,10a ...... Driven teeth 8 ', 9' ... Mating surface
Claims (2)
が挿通する第１段の中空ねじ筒を固設し、該第１段の中
空ねじ筒の外周に螺合するナットに前記第１段の中空ね
じ筒が挿通する第２段の中空ねじ筒を固設して順次中空
ねじ筒を多段に挿通し、第（ｎ−１）段の中空ねじ軸の
外周に螺合するナットに前記（ｎ−１）の中空ねじ軸が
挿通する第ｎ段の中空筒を固設し、第ｎ段の中空筒の先
端部に作動物体を取付けた送りねじによる多段伸縮駆動
装置において、駆動ねじ軸および夫々の中空ねじ筒の先
端部外周の直径上に軸方向の噛合面を突設した伸長用駆
動歯を設け、前記夫々のナットの先端部に前記駆動歯の
噛合面に係合する伸長用被動歯を設けた多段伸縮駆動装
置。1. A first-stage hollow screw cylinder through which the screw shaft is inserted is fixedly mounted on a nut screwed on a drive screw shaft, and the nut screwed on the outer periphery of the first-stage hollow screw cylinder is connected to the nut. A second-stage hollow screw cylinder through which the first-stage hollow screw cylinder is inserted is fixed, and the hollow screw cylinders are sequentially inserted in multiple stages to form a nut that is screwed onto the outer periphery of the (n-1) -th hollow screw shaft. A multi-stage telescopic drive device using a feed screw in which an n-th stage hollow cylinder through which the hollow screw shaft of (n-1) is inserted is fixed, and a working object is attached to the tip end of the n-th stage hollow cylinder An extension drive tooth having an axial engagement surface projecting on the diameter of the shaft and the outer circumference of the tip of each hollow screw cylinder is provided, and the extension of engaging the engagement surface of the drive tooth at the tip of each nut. Multi-stage telescopic drive device with driven teeth for use.
後端に形成したフランジ部の前面に縮少用駆動歯を、夫
々のナットフランジ部の後面に縮少用駆動歯に噛合する
縮少用被動歯を、設けた実用新案登録請求の範囲第１項
記載の送りねじによる多段伸縮駆動装置。2. A reduction drive tooth is formed on a front surface of a base end outer periphery of a drive screw shaft and a flange portion formed on each nut rear end, and a reduction drive tooth is meshed on a rear surface of each nut flange portion. A multi-stage telescopic drive device using a feed screw according to claim 1, wherein a utility model registration is provided with a small number of driven teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3260189U JPH0611432Y2 (en) | 1989-03-24 | 1989-03-24 | Multi-stage telescopic drive device with feed screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3260189U JPH0611432Y2 (en) | 1989-03-24 | 1989-03-24 | Multi-stage telescopic drive device with feed screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02124352U JPH02124352U (en) | 1990-10-12 |
| JPH0611432Y2 true JPH0611432Y2 (en) | 1994-03-23 |
Family
ID=31535653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3260189U Expired - Lifetime JPH0611432Y2 (en) | 1989-03-24 | 1989-03-24 | Multi-stage telescopic drive device with feed screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0611432Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009103203A (en) * | 2007-10-23 | 2009-05-14 | Hiwin Mikrosystem Corp | Drive device for expansion and contraction actuator |
| JP5286202B2 (en) * | 2009-09-02 | 2013-09-11 | アズビル株式会社 | Rotation-linear motion conversion mechanism and actuator |
| CN106737577A (en) * | 2016-12-14 | 2017-05-31 | 亿嘉和科技股份有限公司 | A kind of spiral expanding mechanism |
| CN106641148B (en) * | 2017-01-10 | 2020-09-18 | 浙江捷昌线性驱动科技股份有限公司 | Transmission assembly and lifting upright post |
-
1989
- 1989-03-24 JP JP3260189U patent/JPH0611432Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02124352U (en) | 1990-10-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |