WO2012177175A2 - Dispositif de positionnement linéaire - Google Patents

Dispositif de positionnement linéaire Download PDF

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Publication number
WO2012177175A2
WO2012177175A2 PCT/RU2012/000351 RU2012000351W WO2012177175A2 WO 2012177175 A2 WO2012177175 A2 WO 2012177175A2 RU 2012000351 W RU2012000351 W RU 2012000351W WO 2012177175 A2 WO2012177175 A2 WO 2012177175A2
Authority
WO
WIPO (PCT)
Prior art keywords
nut
screw
movable part
drive screw
drive
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.)
Ceased
Application number
PCT/RU2012/000351
Other languages
English (en)
Russian (ru)
Other versions
WO2012177175A3 (fr
Inventor
Лев Семенович КОЛЬНЕР
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OBSCHESTVO S OGRANICHENNOY OTVETSTVENNOSTU "LABORATORII AMFORA"
Original Assignee
OBSCHESTVO S OGRANICHENNOY OTVETSTVENNOSTU "LABORATORII AMFORA"
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 OBSCHESTVO S OGRANICHENNOY OTVETSTVENNOSTU "LABORATORII AMFORA" filed Critical OBSCHESTVO S OGRANICHENNOY OTVETSTVENNOSTU "LABORATORII AMFORA"
Publication of WO2012177175A2 publication Critical patent/WO2012177175A2/fr
Publication of WO2012177175A3 publication Critical patent/WO2012177175A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/068—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track
    • F16C29/0683—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque
    • 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
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/02—Heads
    • F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
    • F16M11/043—Allowing translations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
    • 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
    • F16H25/2003—Screw mechanisms with arrangements for taking up backlash

Definitions

  • the utility model relates to the field of instrumentation and can be used in devices that provide accurate mutual positioning of the object and the measuring or processing tool.
  • Such devices include, for example, one-, two- and three-coordinate machines, in which the utility model can be used in an element that provides positioning of an object or tool in one coordinate.
  • a linear positioning device is known in the art in which a stage equipped with a pneumatic support is the movable part of the device (JP60113816A, F16C32 / 06, 06/20/1985).
  • the table is rigidly connected to a nut, which has a screw connection with a drive screw mounted on a fixed part.
  • the screw is driven by an electric motor; as a result, the nut and the table move in a linear direction.
  • the electric motor is connected to the screw through a reduction gear, between the drive elements of which there are also backlashes that impair the accuracy of positioning.
  • the objective of the utility model is to develop a solution to improve the accuracy of the linear positioning device.
  • a linear positioning device containing moving and stationary parts is proposed.
  • the movable part is connected to a nut having helical engagement with a drive screw that is mounted on the fixed part.
  • this drive screw is connected to the axis the worm gear wheels, the screw engagement of the nut and the drive screw is non-self-locking, and a constant force is applied to the movable part of the device, providing a nut action directed along the longitudinal axis of the drive screw.
  • the movable part may be attached to the nut.
  • the nut may be associated with a support element mounted on a rail mounted on a fixed part.
  • the movable part in the direction of constant force can be supported by the support element.
  • the contact of the movable part and the support element can be carried out at essentially one point.
  • the screw engagement of the nut and the drive screw can be made in the form of a threaded connection with a large angle of elevation of the thread or in the form of a ball screw transmission.
  • the technical result of the utility model is to exclude the influence of backlash in the transmission of the drive screw-nut, as well as in the gearbox between the electric motor and the drive screw on the accuracy of movement of the moving part.
  • figure 1 linear positioning device, top view
  • figure 2 - linear positioning device, view A;
  • Fig. 3 - worm gear linear positioning device, section BB.
  • the linear positioning device shown in figures 1 and 2 made in the form of a single-coordinate table.
  • the movable part of the device comprises a platform 1, and the stationary part has a base 2.
  • the platform is mounted on the base on pneumatic bearings that create a force in the vertical direction and are formed with the help of the guides 3 fixed on the base and the wedges 4 fixed on the platform.
  • the device is equipped with an additional pneumatic support creating a force in the horizontal direction and made with the help of the guide 5 and the wedge b, which are mounted respectively on the base and the platform.
  • the wedge 6 is connected to the traverse 7 of the platform by means of corner elements 8 and 9, moreover, the connections of the corner elements to each other, as well as to the wedge and the traverse, are made using screws. This method of connecting wedges and platforms allows you to minimize the impact of performance errors on all the contacting surfaces of the above elements by the amount of air gap between the guide 5 and the wedge 6, which is achieved due to the mutual movement of the corner elements within the gaps in the screw joints.
  • the corner element 9 is connected to a nut 10 mounted on the drive screw 11.
  • the drive screw is driven by the worm gear 12, the screw being connected to the axle 13 of the wheel of the worm gear 14.
  • the connection of the drive screw and the axis of the worm wheel can be achieved by performing these elements as one whole or their hard coaxial attachment of one to another.
  • the nut When the screw rotates, the nut, unable to turn, moves in the longitudinal direction.
  • the nut can be rigidly attached to the corner element 9 to which a constant force is applied, in this case realized by a cable 17 wound on the spring element 18.
  • the corner element 9 rests in the direction of constant force on the support element connected to the nut 15, which is mounted on a guide 16 fixed to the base.
  • the contact of the corner element 9 and the support element 15 is made using a ball and a flat surface and is carried out in the region 20, which is essentially a point.
  • the point contact area reduces the accuracy requirements for contact surfaces.
  • the platform is moved by the force applied to the corner element 9 from the nut, and when the drive shaft is rotated in the opposite direction, the platform is moved by the force applied to the angular element 9 from the spring element.
  • Non-self-locking helical gearing in the context of this application refers to helical gearing in which the nut is able to move along the screw under the influence of the force applied to the nut in the direction of the screw axis.
  • Examples of non-self-locking helical gears include a threaded joint with a large pitch angle or a ball screw gear. If the drive screw were not connected to
  • the worm gear like any gear, is characterized by a certain backlash formed due to the gap between its elements - the worm screw 19 and the worm wheel 14.
  • the worm gear is self-braking, i.e. the rotation of the worm wheel is permissible only within the clearance between the teeth of the worm wheel and the worm screw. Since the drive screw is connected to the axis of the worm wheel, under the influence of the spring element, the nut rotates the worm wheel, for example, in direction B, ensuring constant contact between the teeth of the wheel and the screw.
  • linear positioning device in the form of a single-coordinate table is a special case of a utility model that can be used in other devices or their elements that provide linear movement, for example, in portals of coordinate machines.

Landscapes

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

Abstract

Le modèle d'utilité concerne le domaine de l'industrie des instruments et peut s'utiliser dans des dispositifs qui assurent un positionnement précis d'un objet et d'un outil de mesure ou d'usinage. Le dispositif de positionnement linéaire comprend une partie mobile et une partie fixe. La partie mobile est reliée à un écrou qui s'accroche par filetage à une vis d'entrainement montée sur la partie fixe. La vis d'entrainement est reliée rigidement à l'axe d'une roue de réducteur à vis. Le raccord fileté de l'écrou et de la vis d'entrainement n'est pas de type à freinage autonome. Un effort constant appliqué à la partie mobile assure un impact sur l'écrou dirigé le long de l'axe longitudinal de l'arbre d'entraînement. L'invention permet d'améliorer le degré de précision du déplacement de la partie mobile grâce à la sélection d'intervalles entre la vis d'entrainement et l'écrou ainsi que dans le réducteur à vis.
PCT/RU2012/000351 2011-06-21 2012-05-03 Dispositif de positionnement linéaire Ceased WO2012177175A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2011125357 2011-06-21
RU2011125357 2011-06-21

Publications (2)

Publication Number Publication Date
WO2012177175A2 true WO2012177175A2 (fr) 2012-12-27
WO2012177175A3 WO2012177175A3 (fr) 2013-03-07

Family

ID=47423133

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2012/000351 Ceased WO2012177175A2 (fr) 2011-06-21 2012-05-03 Dispositif de positionnement linéaire

Country Status (1)

Country Link
WO (1) WO2012177175A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109596025B (zh) * 2018-11-30 2021-01-08 重庆程顺汽车配件制造有限公司 一种汽车零部件孔位检验装置及其使用方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60113816A (ja) * 1983-11-22 1985-06-20 Miyoutoku:Kk エア−スライド装置
SU1357192A1 (ru) * 1986-04-03 1987-12-07 Институт сверхтвердых материалов АН УССР Устройство дл автоматического позиционировани на упоре рабочего органа станка
RU44363U1 (ru) * 2004-09-16 2005-03-10 Федеральное государственное унитарное предприятие "Государственный космический научно-производственный центр им. М.В. Хруничева" Устройство для позиционирования

Also Published As

Publication number Publication date
WO2012177175A3 (fr) 2013-03-07

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