WO2021183010A1 - Actionneur linéaire télescopique - Google Patents

Actionneur linéaire télescopique Download PDF

Info

Publication number
WO2021183010A1
WO2021183010A1 PCT/RU2021/050059 RU2021050059W WO2021183010A1 WO 2021183010 A1 WO2021183010 A1 WO 2021183010A1 RU 2021050059 W RU2021050059 W RU 2021050059W WO 2021183010 A1 WO2021183010 A1 WO 2021183010A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
linear actuator
drive shaft
telescopic linear
casing
Prior art date
Application number
PCT/RU2021/050059
Other languages
English (en)
Russian (ru)
Inventor
Сергей Алексеевич МОИСЕЕНКО
Original Assignee
Сергей Алексеевич МОИСЕЕНКО
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Сергей Алексеевич МОИСЕЕНКО filed Critical Сергей Алексеевич МОИСЕЕНКО
Publication of WO2021183010A1 publication Critical patent/WO2021183010A1/fr

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

Definitions

  • the invention relates to devices for converting rotary motion into reciprocating motion using a screw mechanism, namely to telescopic linear drives, and can be used, for example, for the manufacture of lifters, pushers, actuators for various purposes, providing linear movement or positioning of an object due to axial force generated by the rising stem.
  • a telescopic linear actuator including four sections nested in series coaxially into each other and connected by means of a threaded connection, and a housing into which the folded sections of the device are immersed and which is equipped with a drive mechanism.
  • Each of the three sections is made in the form of a cylinder having an external thread along the entire lateral surface and a reverse internal thread adjacent to the end of the cylinder, from the side of which a smaller section enters, and the fourth section is made in the form of a screw with a thread along the entire lateral surface.
  • the force of rotation from the drive mechanism is transmitted through a nut that encloses the outside of the first section of the largest diameter, which, when rotated, makes an axial movement relative to the body, and also rotates the second section.
  • the second and third, as well as the third and fourth sections interact with each other. Due to the fact that the sections on the inner and outer surfaces have straight and reverse threads, when a rotating force is applied to the first section, all sections rotate and perform unidirectional axial movement.
  • a similar design has a drive described in US patent 1585291 (publ. 05/18/1926), which has a plurality of sections nested one into the other, each of which has an external thread and a reverse internal threads along the entire lateral surface.
  • the rotating force is applied to the section with the smallest diameter.
  • the presence of external threads along the entire lateral surface on the retractable sections requires the installation of additional protective covers, as, for example, described in the application US 2005/0161649 (publ. 28.07.2005).
  • the transfer of the rotating force from the drive mechanism to the first (or last) section requires its installation with the possibility of rotation in an additional housing, which serves as a fixed support during the operation of the device.
  • the application of a rotating force to the first - extreme section requires additional support on which the rotating section would be supported. Otherwise, the first section cannot be used as a support section to be installed directly on the object with which the telescopic linear actuator is to interact.
  • the prototype includes three sections sequentially nested coaxially into each other and connected by means of a threaded connection, as well as a drive shaft.
  • the first section is made in the form of a glass and has an internal thread made in the part adjacent to the open end of the glass
  • the second section is made in the form of a glass and has an external thread aligned with the internal thread of the first section along the entire side surface, as well as an internal thread having a reverse direction relative to the said external thread and adjacent to the open end of the glass.
  • the third section is made in the form of a cylinder having an external thread matched to the internal thread of the second section along the entire lateral surface.
  • the drive shaft of the device rotates through a central hole made in the bottom of the first section, and engages with a central hole made in the bottom of the second section, with the possibility of free axial movement therein.
  • the rotational force is applied to the second - the middle section of the telescopic drive, as a result of the rotation of which the second section can perform axial movement relative to the first section, and the third section - axial movement relative to the second section, while the extreme support sections do not rotate during operation of the drive.
  • the problem to be solved by the claimed device is to create a simple design of a telescopic linear drive with a fixed support section, free from the indicated drawbacks.
  • the telescopic linear actuator in accordance with this technical solution includes three sections nested in series coaxially into each other and connected by means of a threaded connection, as well as drive shaft.
  • the first section is made in the form of a glass and has an internal thread.
  • the second section is made in the form of a glass and has an external thread matched with the internal thread of the first section, made in the part adjacent to the bottom of the glass and protruding in the radial direction from the outer side surface, as well as an internal thread having a direction opposite to the said external thread.
  • the third section is made in the form of a hollow part and has an external thread matched with the internal thread of the second section, made in the part adjacent to the end of the part and projecting in the radial direction from the external lateral surface. Assembled, the third section is placed in the second section with an external thread in the direction of the bottom of the second section, and the second section is placed in the first section with an external thread in the direction of the bottom of the first section, while the drive shaft rotates through the central hole made in the bottom of the first section, enters into engagement with a central hole made in the bottom of the second section, with the possibility of free axial movement in it, while the transverse dimensions of the drive shaft and the inner space of the third section are chosen so that the drive shaft can freely rotate in the inner space of the third section.
  • the device In the folded state of the device, its third section is immersed in the second section, while the threaded connection between them is provided by means of the internal thread of the second section and the external thread of the third section, and the second section is immersed in the first section, while the threaded connection between them is provided by means of the internal thread of the first section and the external thread of the second section.
  • the drive shaft which can rotate through the central hole made in the bottom of the first section, also passes through the hole made in the bottom of the second section, while the drive shaft engages with the second section so that it can transmit the rotational force to the second section and at the same time can move freely in the axial direction relative to the hole in the bottom of the second section.
  • the drive shaft extends into the interior of the third section so that it can rotate freely therein.
  • rotating the drive shaft begins to rotate the second section, which, thanks to the threaded connection, begins to move out of the first section, while the second section freely slides along the drive shaft.
  • the simultaneously rotating second section given that its threaded connection with the third section has the opposite direction, causes the third section to extend.
  • all parts of the interacting threaded connections are inside, and not outside the device, as is typical for the prototype, as a result of which the specified result is achieved.
  • the third section of the device can be made in the form of a cylindrical part. Strictly speaking, only the part with an external thread adjacent to the end should be cylindrical, and the rest of the part may have a shape that differs from cylindrical, for example, square in cross-section.
  • the drive shaft is mounted at one end in a bearing located in a central hole in the bottom of the first section. This achieves the constructive unity of the device.
  • the drive shaft and the said hole have a cross-section that differs from the circular shape ... In particular, they can be polygonal or oval.
  • the free end of the third section can be provided with an overlapping support element.
  • this support element and the third section can be made in one piece.
  • the first section of the device can be provided with an external flange for fastening the device.
  • the device can additionally be provided with a casing made in the form of a glass with a central hole in the bottom of the glass.
  • the casing is attached from the inside with the possibility of rotation to the outer side surface of the second section and is installed so that its open end faces towards the first section and covers it from the outside, engaging with it with the possibility of axial movement, and its opening covers the outside of the third section, engaging with it with the possibility of axial movement.
  • the casing which is engaged with the non-rotating first section, blocks the rotation of the third section, but is movable in the axial direction with the second section to which it is attached. At the same time, the casing covers the second section - the only rotating telescopic part of the device.
  • the attachment of the casing to the outer surface of the second section can be performed using a rolling bearing, wherein the outer bearing ring is attached to the inner surface of the casing, preferably in the region adjacent to the bottom of the cup, and the inner bearing ring is attached to the outer lateral surface of the second section, preferably in the area adjacent to its open end.
  • the engagement with the possibility of only axial movement of the casing with the first section can be ensured, for example, by making the engaging inner surface of the casing and the outer surface of the first section with a cross-sectional shape other than circular, in particular square, hexagonal, oval, etc. NS.
  • a cross-sectional shape other than circular, in particular square, hexagonal, oval, etc. NS.
  • FIG. 1 in longitudinal section shows an example of a telescopic linear actuator in accordance with the claimed technical solution.
  • the sections of the device are shown disconnected.
  • FIG. 2-4 show a section through various examples of the drive shaft, wherein FIG. 2 shows a cross-section of a hexagonal shape, FIG. 3 - cruciform, FIG. 4 - oval.
  • FIG. 5 shows what is noted in FIG. 1 section AA, illustrating an example of the third section in the part free of external threads and a drive shaft with a square cross section.
  • FIG. 6 shows a fragment of an exemplary embodiment of the third section of the device, the end of which is provided with a support element.
  • FIG. 7 shows in longitudinal section an example of a telescopic linear actuator with a casing covering the rotating second section and preventing the rotation of the third section of the device.
  • FIG. 8 shows what is noted in FIG. 7 is a section B-B showing the cross-sectional shape of the engaging inner surface of the casing and the outer surface of the first section of the device.
  • FIG. 9 shows the referenced in FIG. 7 are sections C-C showing the cross-sectional shape of the engaging center bore of the casing and the outer surface of the third section of the device.
  • a telescopic linear actuator includes a first section 10, a second section 20, a third section 30, and a drive shaft 40.
  • the first section 10 is made in the form of a glass having a cylindrical side wall 11 and a bottom 12.
  • An internal thread 13 is made substantially over the entire inner surface of the wall 11, and the center of the bottom 12 has a hole 14, in which, by means of a bearing 15, a drive shaft 40 is rotatably mounted about an axis 16. options for this solution.
  • the first section 10 can be provided with a flange 17.
  • the second section 20 is also made in the form of a glass having a cylindrical side wall 21 and a bottom 22.
  • an internal thread 23 is made, having the opposite direction relative to the internal thread 13 of the first section 10, and a hole 24 is made in the center of the bottom 22 for engaging the second section 20 with the drive shaft 40.
  • an external thread 25 is made, matched with the internal thread 13 of the first section 10. In this case, the external thread 25 protrudes in the radial direction from the outer side surface 26 of the wall 21 so that when the second section 20 is placed inside the first section 10, the outer side surface 26 of the wall 21 does not touch the internal thread 13 of the first section 10.
  • the third section 30 in this example is made in the form of a hollow cylinder having a side wall 31 and open ends 32 and 33.
  • the internal space 34 of the third section 30, bounded by the side wall 31, has transverse expansions sufficient for free rotation of the drive shaft 40 in it.
  • an external thread 35 is made, which is matched with the the third section 30 within the second section 20, the outer side surface 36 of the wall 31 does not touch the internal thread 23 of the second section 20.
  • the third section 30 is immersed in the second section 20, while the threaded connection between them is provided by means of the internal thread 23 of the second section 20 and the external thread 35 of the third section 30.
  • the second section 20 is immersed in the first section 10, while the threaded connection between they are provided by means of an internal thread 13 of the first section 10 and an external thread 25 of the second section 20.
  • the drive shaft 40 mounted in the bearing 15, passes through an opening 24 made in the bottom 22 of the second section 20, and in the inner space 34 of the third section 30.
  • the opposite end of the drive shaft 40 extends outside the first section 10 and is connected to a drive mechanism (not shown in Fig. 1).
  • the engagement of the drive shaft 40 with the second section 20, in which the force of rotation would be transmitted to the second section 20 and at the same time the drive shaft 40 could move freely in the axial direction in the hole 24 of the second section 20, is ensured by the coordinated cross-sectional shape of the drive shaft 40 and the hole 24, with which excludes the rotation of the drive shaft 40 in the hole 24.
  • it can be a shape other than round, for example, hexagonal (Fig. 2), cruciform (Fig. 3), oval (Fig. 4), square, as shown in FIG. 5.
  • the drive shaft 40 extends into the inner space 34 of the third section 30 so that it can freely rotate about the axis 16.
  • the third section 30 has a cylindrical shape.
  • the shape of the third section 30 may be different - depending on the particular application of the device, for example, it may be square in cross-section, as shown in FIG. 5. It also shows a drive shaft 40 of square cross-section, which can rotate freely in the inner space 34 of the third section 30.
  • the rotating drive shaft 40 begins to rotate the second section 20, which, due to the threaded connection with the first section 10, begins to move out of it along the axis 16 while, due to the above-described cross-sectional shape of the drive shaft 40 and the hole 24, the second section 20 slides freely along the drive shaft 40.
  • the second section 20 In the unloaded state from the side of the free end 33 of the third section 30, the latter will rotate together with the second section 20.
  • the rotation of the third section 30 it starts to move out of the second section 20.
  • the second section 20 rotates, the second section 20 simultaneously extends out of the first section 10, and the third section 30 extends out of the second section 20.
  • the end face 33 of the third section 30 may be provided with an overlapping support member 37, which can be integrally formed with the third section 30.
  • the end face 33 of the third section 30 may be provided with means for attaching to an object with which the device interacts, for example , made in the form of a transverse hole 38 in the end face 33, as shown in FIG. 7.
  • the device can be provided with a casing 50, as shown in FIG. 7-9.
  • the casing 50 is made in the form of a glass having a side wall 51 and a bottom 52 with a central hole 54.
  • the casing 50 is attached from the inside to the outer side surface 26 of the second section 20 by means of a rolling bearing 55 and is installed so that its open the end 53 faces towards the first section 10 and encloses it from the outside.
  • the outer ring of the bearing 55 is attached to the inner surface of the casing 50, preferably in the region adjacent to the bottom 52, and the inner ring of the bearing 55 is attached to the outer side surface 26 of the second section 20, preferably in the region adjacent to its open end.
  • an expansion ring 57 can be used to install it.
  • the shroud 50 (see FIG. 8) has a square cross-section with rounded corners.
  • the outer lateral surface 16 of the first section 10 adjacent to the inner surface of the casing 50 has the same cross-sectional shape. Due to the specified form of execution of the abutting surfaces, the casing 50 engages with the first section 10, at which the rotation of the casing 50 relative to the first section is blocked. 10, but the possibility of axial movement of the casing 50 is retained.
  • the casing 50 has antifriction spacers 58 of a material with a low friction coefficient located around the perimeter on the inner side of the casing 50 near its open end 53. Instead of separate spacers 58, a single ring of material with a low coefficient of friction.
  • the opening 54 of the casing 50 externally surrounds the third section 30, engaging with it with the possibility of only axial movement. This is achieved due to the similar design of the hole 54 and the adjacent side surface 36 of the third section 30, which in cross-section have a square shape with rounded corners. Due to the specified form of execution of the adjacent surfaces, the casing 50 engages with the third section 30, which retains the possibility of only axial movement of the casing 50 relative to the third section 30. To reduce sliding friction, the casing 50 has an anti-friction ring 59 made of a material with a low coefficient of friction placed inside the hole 54 around its perimeter.
  • the described adhesion of the casing with the first and third sections is ensured by the cross-sectional shape of the engaging surfaces - it must be different from round, in particular, it can be square, hexagonal, oval, etc. a friend of longitudinal protrusions and grooves that prevent the relative rotation of the interlocking parts, but do not impede their axial moving relative to each other. Specialists are aware of other options for engaging parts, in which their relative rotation is excluded, but the possibility of axial movement is retained.
  • the casing 50 which is engaged with the non-rotating first section 10, blocks the rotation of the third section 30, but is movable in the axial direction with the second section 20 to which it is attached.
  • the second section 20 rotates, synchronous extension of the second section 20 from the first section 10 and the third section 30 from the second section 20 is provided.
  • the third section 30 is immersed in the second section 20, which, in turn, is immersed in the first section 10 while the casing 50 partially or substantially completely covers the outside of the side surface of the first section 10.
  • the second section 20, as in the example illustrated in FIG. 1, is driven into rotation by a drive shaft 40 engaging with the possibility of axial movement with a central hole made in the bottom of the second section 20.
  • the shaft 40 On the opposite side, the shaft 40 is mounted in a bearing 15 at the bottom of the first section 10, and its end is brought out outside the first section 10 and is connected to a gear wheel 45 driven in rotation by an electric motor through a gearbox (not shown in Fig. 7).
  • the casing 50 in the extended state of the device completely covers the second section 20 - the only rotating part of the device, thereby protecting its mechanism from undesirable effects of the external environment.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

L'invention concerne un actionneur comprenant trois sections insérées successivement et coaxialement l'une dans l'autre et connectées par une connexion filetée. La première section (10) comprend un filetage interne, la deuxième section (20) comprend un filetage externe correspondant au filetage interne de la première section, ainsi qu'un filetage interne ayant une direction inverse par rapport au filetage externe, la troisième section (30) possède un filetage externe correspondant au filetage interne de la deuxième section et dépassant dans la direction radiale depuis la surface latérale externe (36). Un arbre d'actionnement (40) capable de rotation passe à travers une ouverture centrale formée dans le fond de la première section (10), et vient en contact avec une ouverture centrale formée dans le fond de la deuxième section (20) de manière à pouvoir se déplacer librement et axialement dans celle-ci.
PCT/RU2021/050059 2020-03-10 2021-03-09 Actionneur linéaire télescopique WO2021183010A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2020110201 2020-03-10
RU2020110201 2020-03-10

Publications (1)

Publication Number Publication Date
WO2021183010A1 true WO2021183010A1 (fr) 2021-09-16

Family

ID=77671911

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2021/050059 WO2021183010A1 (fr) 2020-03-10 2021-03-09 Actionneur linéaire télescopique

Country Status (1)

Country Link
WO (1) WO2021183010A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114934940A (zh) * 2022-03-24 2022-08-23 广东博智林机器人有限公司 伸缩装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1737373A (en) * 1927-04-01 1929-11-26 Nat Standard Co Lifting jack
SU975328A1 (ru) * 1981-02-24 1982-11-23 Предприятие П/Я В-8178 Устройство дл защиты резьбы
SU1588956A1 (ru) * 1988-06-30 1990-08-30 Тернопольский Филиал Львовского Политехнического Института Винтова передача с защитным устройством
DE3910814A1 (de) * 1989-04-04 1990-10-11 Hasenclever Maschf Sms Schraubgetriebene linearhubeinheit
RU2423630C1 (ru) * 2010-05-07 2011-07-10 Федеральное государственное образовательное учреждение высшего профессионального образования Волгоградская государственная сельскохозяйственная академия Упругодемпфирующая муфта
DE202016100995U1 (de) * 2015-04-28 2016-06-02 Nidec Corporation Drehübertragungsanordnung, Vorrichtung zur Umwandlung einer Drehbewegung in eine Linearbewegung und Motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1737373A (en) * 1927-04-01 1929-11-26 Nat Standard Co Lifting jack
SU975328A1 (ru) * 1981-02-24 1982-11-23 Предприятие П/Я В-8178 Устройство дл защиты резьбы
SU1588956A1 (ru) * 1988-06-30 1990-08-30 Тернопольский Филиал Львовского Политехнического Института Винтова передача с защитным устройством
DE3910814A1 (de) * 1989-04-04 1990-10-11 Hasenclever Maschf Sms Schraubgetriebene linearhubeinheit
RU2423630C1 (ru) * 2010-05-07 2011-07-10 Федеральное государственное образовательное учреждение высшего профессионального образования Волгоградская государственная сельскохозяйственная академия Упругодемпфирующая муфта
DE202016100995U1 (de) * 2015-04-28 2016-06-02 Nidec Corporation Drehübertragungsanordnung, Vorrichtung zur Umwandlung einer Drehbewegung in eine Linearbewegung und Motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114934940A (zh) * 2022-03-24 2022-08-23 广东博智林机器人有限公司 伸缩装置

Similar Documents

Publication Publication Date Title
KR101703498B1 (ko) 파동 기어식 직동 기구
US8932176B2 (en) Linear actuator and method of operation thereof
AU1351700A (en) Electric Actuator
US10837532B2 (en) Linear actuator
US9512909B2 (en) Actuator assembly for translating a movable element of a driveline component
EP0572543B1 (fr) Actionneur miniature lineaire
JP2011052760A (ja) 回転−直動変換機構およびアクチュエータ
WO2021183010A1 (fr) Actionneur linéaire télescopique
WO2014157032A1 (fr) Actionneur linéaire
CN106122407B (zh) 螺纹传动组件和具有螺纹传动组件的座位组件
JP6338340B2 (ja) リニアアクチュエータ
EP3462060A1 (fr) Actionneurs de vis à billes
JP2008116037A (ja) 電動アクチュエータ
RU198105U1 (ru) Телескопический линейный привод
JP2005163922A (ja) アクチュエータ
JP6055514B2 (ja) リニアアクチュエータ
JP6996462B2 (ja) 回転式アクチュエータ
JP3736238B2 (ja) 電動式リニアアクチュエータ
JP2018128011A (ja) カム整相システムおよびカム整相方法
CN214425040U (zh) 直线伸缩传动装置
WO2021006764A1 (fr) Réducteur à galet et vis, mécanisme d'entraînement et unité d'articulation
JP2005121184A (ja) アクチュエータ
GB2437973A (en) Actuator having wave generating means
JP2022182162A (ja) 動力伝達装置及び電動アクチュエータ
JP2023006290A5 (fr)

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21768958

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21768958

Country of ref document: EP

Kind code of ref document: A1