WO2004113763A1 - Verin a vis et ecrou - Google Patents
Verin a vis et ecrou Download PDFInfo
- Publication number
- WO2004113763A1 WO2004113763A1 PCT/FR2004/050280 FR2004050280W WO2004113763A1 WO 2004113763 A1 WO2004113763 A1 WO 2004113763A1 FR 2004050280 W FR2004050280 W FR 2004050280W WO 2004113763 A1 WO2004113763 A1 WO 2004113763A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- screw
- nut
- housing
- bellows
- motor
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
- F16H25/2418—Screw seals, wipers, scrapers or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/204—Axial sliding means, i.e. for rotary support and axial guiding of nut or screw shaft
Definitions
- the subject of the invention is a screw jack and nut.
- Such devices include a fixed frame or support, a motor fixed to the frame, and a screw and nut system engaged around one another.
- the motor is connected either to the screw or to the nut so as to transmit its rotations to it, which the threaded engagement converts into translations of the other part.
- Screw and nut jacks have some notable advantages, such as the precision of the movement and the reversibility or not of the transmission according to the angle of inclination of the thread.
- Conversion of the movement is only possible by providing a device for stopping the part subjected to translation from rotating.
- a device for stopping the part subjected to translation from rotating There are many kinds, such as the interaction of a finger and a groove, the use of rollers or rollers rolling on a flat surface parallel to the direction of translation, etc. ; some may belong to devices which are also usual for maintaining the coaxiality of the screw and the nut and thus ensuring correct operation of the jack, others are independent of it. But all must have a fairly large length, at least equal to the total linear displacement travel between the screw and the nut. The cylinders are much heavier.
- a new system opposing the rotation of the part, nut or screw, which is subject to translation is proposed as the invention. It has the advantages that it is simple to install, light, and that it often allows, by taking its function, to give up the device for maintaining coaxiality between the nut and the screw, which further lightens the jack.
- Bellows are commonly used in mechanics, but rather because of their flexibility in most directions to absorb translational or tilting movements between two parts that they connect, or even to offer a variable volume capacity capable, for example, to absorb the energy of a water hammer in a hydraulic piping.
- the bellows is above all useful by its high torsional rigidity combined with its great flexibility in extension: fixed between the frame and either the nut or the screw, it can follow the translational movements of this part without opposing any significant effort, while on the contrary exerting a significant effort against its rotation.
- FIGS. 1 and 2 show two variants of a screw jack with a rotating nut, and Figure 3 a rotating screw jack.
- a nut 1 is housed in a housing 2, in which it is adjusted by a pair of bearings 3 so as to be able to pivot therein.
- a ring 4 of the nut 1 leaves the housing 2 and receives a belt 5 for rotating in a groove 6 formed at its periphery.
- the belt 5 is driven by a motor 7 fixed on the outside of the housing 2.
- a screw 8 passes through the housing 2 right through and is joined to the nut 1 by a threaded engagement of the usual nature, which can be simple or include intermediate balls.
- This linear actuator typically serves to modify the difference between two objects not shown in detail, one of which A is secured to one end 9 of the screw 8 and the other B is secured to the frame 2.
- the connections to the objects A and B are generally rotating in order to offer the cylinder a freedom of inclination which is even necessary if the connection points are at different heights perpendicular to the direction of movement of the objects A and B, because the screw 8 must tilt when it is out of place.
- the end of the screw therefore comprises a ball 9 pierced with a circular hole to receive an axis not shown of the object A, and the housing 2 carries a pivot 10 engaged in a corresponding hole in the object B.
- a metal bellows of usual nature surrounds the screw 8 and connects it to the housing 2.
- it is double and comprises two portions 11 and 12, extending respectively from each end face of the housing 2 to the corresponding ends of the screw 8.
- the bellows is used above all to prevent rotation of the screw 8 relative to the housing 2, only one of the portions 11 and 12 may be sufficient, but in practice it is useful to cover the entire length outside the housing 2 of the screw 8 to complete the sealing.
- the elasticity of the bellows in bending contributes to maintaining without other device a good coaxiality of the screw 8 and the nut 1, by means of the housing 2 maintained at an invariable orientation of the nut 1 by the bearings 2 and connected to screw 8 by the bellows.
- FIG. 2 also comprises the housing 2, the bearings 3, the nut 1, the screw 8 and the ball 9 for receiving an object displaced at one of its ends, as well as the motor 7, but this- ci is now placed behind the opposite end of the screw 8, with an output shaft 13 coaxial with the screw 8 and the nut 1, which it drives by a rigid coupling composed of a sleeve 14.
- the frame comprises another sheath 15 fixed to the housing 2 and at the end of which the motor 7 is fixed. In this configuration, the portion of the screw 8 which does not include the end at the ball joint 9 is surrounded both by the sleeve 14 and by the sheath 15, which means that the bellows characteristic of the invention comes down to the portion 12, the portion 11 having become useless. Nothing else is changed from the previous configuration.
- FIG. 3 represents one of them, which still has certain elements identical to those of FIG. 1, bearing the same number.
- the housing here bears the reference 16, the motor 7 is fixed thereto and its shaft 13 extends through the housing 16; a coupling sleeve 17 makes it possible to drive the screw 8, coaxial with the shaft of the motor 13, by the latter; the nut 1 is released from the housing 16 and here carries a pivot 18 intended for connection to the object A, while the housing 16 carries the pivot 10 intended for the connection to the object B.
- the bellows further comprises the two portions 11 and 12 on either side of the nut and covering the entire free length of the screw 8, but here the portions 11 and 12 are linked to the nut 1; they extend to the housing 16 for one, to a bearing 19, disposed at the end of the screw 8 which is opposite to the motor 7, for the other; only the portion 11 of the bellows between the nut 1 and the housing 16 effectively serves to stop the rotation, the other 12 having only a sealing role and the bearing 19 maintaining the freedom of rotation between the screw 8 and nut 1.
- the housing 2 or 16 can take other shapes or proportions, as we have seen in FIG. 2 where it is extended by a sheath 15 which is represented separately from him, but who could be part of it; the term “housing” denotes any structural element supporting or connecting together the other elements which need to be so, such as the motor 7, and capable of absorbing certain forces; a traditional cylinder housing envelops part of the length of the movable rod, as does the sheath 15 of FIG. 2, but the housing can be much smaller here since it becomes unnecessary to cover this part of the rod when a bellows with two portions 11 and 12 is used.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR03/50229 | 2003-06-18 | ||
FR0350229A FR2856452B1 (fr) | 2003-06-18 | 2003-06-18 | Verin a vis et ecrou |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004113763A1 true WO2004113763A1 (fr) | 2004-12-29 |
Family
ID=33484724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2004/050280 WO2004113763A1 (fr) | 2003-06-18 | 2004-06-18 | Verin a vis et ecrou |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2856452B1 (fr) |
WO (1) | WO2004113763A1 (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011122722A (ja) * | 2009-12-14 | 2011-06-23 | Hamilton Sundstrand Corp | リニアアクチュエータ、その作動方法およびそのトルクリアクタ |
CN105347087A (zh) * | 2015-12-14 | 2016-02-24 | 重庆东登科技有限公司 | 采用防锈电动缸的卷材分切机超声波纠偏机构 |
CN105347086A (zh) * | 2015-12-14 | 2016-02-24 | 重庆东登科技有限公司 | 采用防锈电动缸的卷材分切机光电纠偏机构 |
CN105370832A (zh) * | 2015-12-14 | 2016-03-02 | 重庆东登科技有限公司 | 带密封润滑结构的电动直线驱动器 |
CN105417249A (zh) * | 2015-12-14 | 2016-03-23 | 重庆东登科技有限公司 | 带防锈和减震保护的卷材分切机光电纠偏机构 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011112273A1 (de) | 2011-09-05 | 2013-03-07 | Brose Fahrzeugteile Gmbh & Co. Kg, Hallstadt | Antriebsanordnung zur motorischen Verstellung eines Verstellelements eines Kraftfahrzeugs |
DE102011116559B4 (de) * | 2011-10-21 | 2018-03-08 | BROSE SCHLIEßSYSTEME GMBH & CO. KG | Verfahren zur Herstellung eines Spindelantriebs für ein Verstellelement eines Kraftfahrzeugs |
JP6779645B2 (ja) | 2016-03-30 | 2020-11-04 | Ntn株式会社 | 電動アクチュエータ |
WO2017211463A1 (fr) * | 2016-06-06 | 2017-12-14 | Sew-Eurodrive Gmbh & Co. Kg | Entraînement linéaire comportant un écrou de broche et une broche montés à rotation dans un flasque |
DE102016006735B4 (de) * | 2016-06-06 | 2020-10-29 | Sew-Eurodrive Gmbh & Co Kg | Linearantrieb mit einer in einem Lagerschild drehbar gelagerten Spindelmutter und Spindel |
EP3467347B1 (fr) * | 2017-10-03 | 2021-12-01 | Hamilton Sundstrand Corporation | Actionneur linéaire |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2394724A1 (fr) * | 1977-06-13 | 1979-01-12 | Micro Controle | Dispositif d'entrainement a vis et ecrou |
DE4105090A1 (de) * | 1990-02-19 | 1991-08-22 | Ken Yanagisawa | Fuehrungseinrichtung fuer zusammengesetzte bewegungen |
EP0840425A1 (fr) * | 1996-04-19 | 1998-05-06 | Sintokogio Ltd. | Cylindre actionne par moteur |
DE20101545U1 (de) * | 2001-01-30 | 2001-04-26 | Spn Schwaben Praez Fritz Hopf | Vorrichtung zum Antrieb eines eine Hubbewegung und eine Schwenkbewegung ausführenden Organs |
-
2003
- 2003-06-18 FR FR0350229A patent/FR2856452B1/fr not_active Expired - Fee Related
-
2004
- 2004-06-18 WO PCT/FR2004/050280 patent/WO2004113763A1/fr active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2394724A1 (fr) * | 1977-06-13 | 1979-01-12 | Micro Controle | Dispositif d'entrainement a vis et ecrou |
DE4105090A1 (de) * | 1990-02-19 | 1991-08-22 | Ken Yanagisawa | Fuehrungseinrichtung fuer zusammengesetzte bewegungen |
EP0840425A1 (fr) * | 1996-04-19 | 1998-05-06 | Sintokogio Ltd. | Cylindre actionne par moteur |
DE20101545U1 (de) * | 2001-01-30 | 2001-04-26 | Spn Schwaben Praez Fritz Hopf | Vorrichtung zum Antrieb eines eine Hubbewegung und eine Schwenkbewegung ausführenden Organs |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011122722A (ja) * | 2009-12-14 | 2011-06-23 | Hamilton Sundstrand Corp | リニアアクチュエータ、その作動方法およびそのトルクリアクタ |
CN105347087A (zh) * | 2015-12-14 | 2016-02-24 | 重庆东登科技有限公司 | 采用防锈电动缸的卷材分切机超声波纠偏机构 |
CN105347086A (zh) * | 2015-12-14 | 2016-02-24 | 重庆东登科技有限公司 | 采用防锈电动缸的卷材分切机光电纠偏机构 |
CN105370832A (zh) * | 2015-12-14 | 2016-03-02 | 重庆东登科技有限公司 | 带密封润滑结构的电动直线驱动器 |
CN105417249A (zh) * | 2015-12-14 | 2016-03-23 | 重庆东登科技有限公司 | 带防锈和减震保护的卷材分切机光电纠偏机构 |
Also Published As
Publication number | Publication date |
---|---|
FR2856452B1 (fr) | 2005-09-30 |
FR2856452A1 (fr) | 2004-12-24 |
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