EP1426624B1 - Vérin linéaire sans tige - Google Patents

Vérin linéaire sans tige Download PDF

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Publication number
EP1426624B1
EP1426624B1 EP03024743A EP03024743A EP1426624B1 EP 1426624 B1 EP1426624 B1 EP 1426624B1 EP 03024743 A EP03024743 A EP 03024743A EP 03024743 A EP03024743 A EP 03024743A EP 1426624 B1 EP1426624 B1 EP 1426624B1
Authority
EP
European Patent Office
Prior art keywords
linear drive
housing
drive according
section
buffer element
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 - Fee Related
Application number
EP03024743A
Other languages
German (de)
English (en)
Other versions
EP1426624A2 (fr
EP1426624A3 (fr
Inventor
Gerhard Krafft
Rolf Weberruss
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.)
Festo SE and Co KG
Original Assignee
Festo SE and Co KG
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 Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP1426624A2 publication Critical patent/EP1426624A2/fr
Publication of EP1426624A3 publication Critical patent/EP1426624A3/fr
Application granted granted Critical
Publication of EP1426624B1 publication Critical patent/EP1426624B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F15B15/226—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having elastic elements, e.g. springs, rubber pads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/082—Characterised by the construction of the motor unit the motor being of the slotted cylinder type

Definitions

  • the invention relates to a rodless linear drive, comprising an elongated housing having a housing tube and frontally attached end cover and in which there is a receiving space for a movable longitudinally in the housing longitudinal drive part, via a longitudinal slot of the housing tube passing through driver with a guide carriage is movably coupled, which is adjustably guided on a combined with the housing tube to a tube unit linear guide in the housing longitudinal direction, wherein on at least one end portion of the housing in the adjustment of the guide carriage projecting shock receiving means are provided.
  • the DE 19531523 C2 known linear rodless linear drive of this kind is guided via a driver with a piston-like drive part motion-coupled guide carriage on a screwed to the housing tube linear guide adjustable.
  • a shock absorbing means are arranged on both sides of the guide carriage, which guide the carriage decelerate and absorb the force of impact.
  • the shock absorbing means include a shock absorber which is fixed to the pipe unit by means of a bracket-like holder.
  • a rodless linear drive according to the preamble of claim 1 is known from EP 0 884 485 known.
  • shock absorbing means of the known linear drive are very effective and reliable, but cause a significant manufacturing and assembly costs.
  • the associated costs are disproportionate, especially in those cases where the final impact of the guide carriage, be it low speed or low transport loads, is not excessive.
  • the shock absorbing means are formed by a buffer member having a housing fixed to the fixing between the pipe unit and the associated end cover engaging holding portion and a laterally projecting above the pipe unit buffer portion, the buffer portion front of the guide carriage facing, yielding Shock receiving party has and is supported on the back of the side also on the tube unit projecting end cap.
  • the shock absorbing means consist of an easily manufactured buffer element, which, in particular at low impact force of the guide carriage, readily sufficient to unwanted hard collisions between the guide carriage and the end cap to prevent. Since the buffer member is held in place by its engagement between the pipe unit and the end cover, the required fastening measures are very simple and can be realized inexpensively. The assembly is also easy, since the buffer element can be placed, for example, before the final assembly of a cover cover between this and the tube unit and is automatically fixed after the subsequent final assembly of the end cover.
  • the buffer element is suitably made of rubber-elastic material.
  • the buffer element can be made entirely of material having rubber-elastic properties, for example of an elastomeric material.
  • the buffer element is preferably placed in a receiving recess which is formed in the pipe-side end face of the associated end cover facing the pipe unit, wherein the holding section is seated in an inner recess section of the receiving recess, which is covered by the end face of the butt-attached pipe unit.
  • the buffer member protrudes with its buffer portion out of the inner recessed portion and projects laterally beyond the outline of the tube unit.
  • the buffer section is seated in particular in an outer recess portion of the receiving recess, over which it protrudes a little way in the direction of the guide carriage, so that the guide carriage can bounce before it comes into contact with the end cap.
  • the guide carriage then first bounces on the buffer section, which is then deformed while simultaneously braking the guide carriage until the guide carriage finally strikes the clearly defined stop surface and thus the desired end position is reached.
  • the buffer member is positionally secured relative to the housing of the linear drive transversely to the housing longitudinal direction by positive engagement and prevented from falling out even if the holding portion between the end cover and the tube unit is seated without bias or with little play. It is particularly useful to place the securing projections and securing recesses so that they are at least part of their cross-section radially within the outline lie the tube unit and in particular are partially positioned within and partly outside this outline.
  • the buffer element is placed in extension of the linear guide.
  • the arrangement is in particular made such that the buffer element dips with its holding portion between the end cap and the linear guide of the tube unit.
  • a respective buffer element is expediently assigned to both end regions of the housing of the linear drive.
  • a linear drive with particularly compact transversal dimensions can be realized if the linear guide has at its two opposite longitudinal sides guide sections cooperating with the guide carriage, which span a guide plane with respect to which the slot plane containing the longitudinal slot runs obliquely at an acute angle.
  • Such a designed linear drive is for example from the EP 1182359 A1 out.
  • the linear drive can in principle be designed as an electrically operable type and, for example, via a spindle drive have a linearly displaceable to run as a spindle nut drive part is capable of.
  • the drive part is designed as a piston and the actuation force is generated by applying fluid is particularly advantageous.
  • the longitudinal slot is associated with a band-like sealing device which prevents uncontrolled fluid leakage through the longitudinal slot.
  • rodless linear drive which is actuated by fluid force. It is especially designed for operation with compressed air.
  • the linear drive 1 has an elongated housing 2 with a housing tube 9 delimiting an accommodating space 3 which is preferably contoured in the interior of a housing 3, to which end cover 4 is fastened on each end side on both sides.
  • FIGS. 5 and 6 show one of these housing cover 4 in isolation.
  • the respective end cap 4 with its one end face - hereinafter referred to as the tube-side end face 19 - attached to one of the two axially oriented end faces 20 of the housing tube 9, so that the receiving space 3 is closed frontally fluid-tight.
  • connection sealing means 21 are provided which can be placed directly between the facing end faces 19, 20, however, are arranged in the embodiment of an insert 22 which is held between the end cover 4 and the housing tube 9 and a little way into the Recording room 3 dips.
  • the insert 22 may be part of a generally with reference numeral 25th be designated fluidic end position damping device which cooperates with a arranged in the interior of the receiving space 3 driving part 6 when it moves to an end position.
  • the drive part 6 is designed as a piston and divides the receiving space 3 into two axially successive working chambers. Via connection openings 7, which are provided on the two end caps 4 and open into one of the working spaces, a supply and removal of pressure medium with respect to the working spaces can take place. In this way, the drive member 6 can cause a drive movement in the direction indicated by dash-dotted housing longitudinal direction 5.
  • the drive movement of the drive part 6 can be tapped outside of the housing 2 on a guide carriage 8, which is motion-coupled via a driver 12 to the drive part 6 in the housing longitudinal direction 5.
  • the guide carriage 8 is adjustably guided on a housing-fixed linear guide 13 in the housing longitudinal direction 5.
  • the linear guide 13 is aligned parallel to the housing 2 and sits in the region of the outer circumference of the housing tube 9, with which it is firmly connected.
  • the linear guide 13 and the housing tube 9 thus together form a structural unit, which is subsequently referred to as a tube unit 18 because the housing tube 9 is involved.
  • the linear guide 13 is formed in the embodiment of a guide rail. It can be a separate component be, which is fixed by suitable fastening means on the outer circumference of the housing tube 9, for example by screws or screwless by rolling.
  • the embodiment shows a design in which the linear guide 13, in particular by extrusion, is integrally formed with the housing tube 9.
  • the tube unit 18 is thus a one-piece component.
  • the guide carriage 8 preferably has a U-like cross-section and overlaps the linear guide 13 like a rider. He cooperates with his two the linear guide 13 on opposite longitudinal sides flanking carriage legs 11 each having a provided on the associated longitudinal side of the linear guide 13 strip-like guide portion 23.
  • the guide portions 23 extend over the entire length of the linear guide 13.
  • the carriage legs 11 can lead to the leading interaction be equipped with the guide portions 23 with schematically indicated rolling or sliding 17.
  • the guide carriage 8 is supported on the linear guide 13 - except in the housing longitudinal direction 5 - on all sides. At its side facing away from the linear guide 13 top it has a support surface 15, are provided on the fastening means 16, so that a load to be transported can be fixed.
  • the wall of the housing tube 9 is provided with a longitudinal slot 26.
  • This opens with an inner slot opening in the receiving space 3 and with an opposite outer Slot opening to the longitudinal outer surface of the housing tube 9 from. It extends in a dash-dotted lines indicated slot plane 32, which is inclined in the embodiment with respect to a spanned by the two guide portions 23 of the linear guide 13 guide plane 24, in particular under a in FIG. 2 indicated acute angle 33.
  • the outer slot opening of the longitudinal slot 26 faces the guide plane 24.
  • the longitudinal slot 26 is associated with a belt-like, bending-flexible sealing device 38. It is able to seal the longitudinal slot 26 axially on both sides of the driver 12 to the environment, so that the desired fluid loading is possible. In the region of the driver 12, the sealing device 38 from the longitudinal slot 26 inwardly and / or outwardly lifted to allow the passage of the driver 12.
  • the sealing device 38 contains in particular a responsible for the sealing of the receiving space 3 inner sealing strip which can cooperate in the region of the inner slot opening with the slot flanks of the longitudinal slot.
  • an outer cover strip may be provided, which prevents penetration of contaminants into the longitudinal slot 26 in the region of the outer slot opening.
  • At least one, in the embodiments at both end portions of the housing 2 8 projecting shock absorbing means are provided in the adjustment of the guide carriage, which prevent a hard, metallic impact of the guide carriage 8 on the end cover 4.
  • These shock absorbing means are formed by buffer elements 27, which are designed in a special way and fixed to the housing.
  • the buffer elements 27 have a plate-like flat shape and are aligned so that their extension plane is perpendicular to the housing longitudinal direction 5. They are placed in the transition region between the pipe unit 18 and one of the end covers 4, respectively.
  • Each buffer element 27 contains a holding section 34 and a buffer section 35 adjoining the latter.
  • the holding section 34 serves to fix the buffer element 27 fixed to the housing and, for this purpose, intervenes between the tube unit 18 and the end cover 4 which is mounted on the front side.
  • the buffer section 35 stands laterally beyond the pipe unit 18 and projects into the adjustment of the guide carriage 8 in.
  • At the guide carriage 8 facing the front side of the buffer portion has a resilient planar Stoßfactpartie 42, which is slightly raised and has a guide carriage 8 facing the shock receiving surface 43 which extends in particular in a direction perpendicular to the housing longitudinal plane.
  • the buffer element 27 is a one-piece body, which as a whole consists of a material having rubber-elastic properties, in particular an elastomeric material.
  • Such security measures are available in the embodiment. They contain two securing projections 52 arranged on the back side of the buffer element 27, which engage in each case in a complementary securing recess 53 open towards the pipe unit 18 in the housing longitudinal direction 5.
  • the securing projections 52 are in particular formed like a pin, wherein the securing recesses 53 have a bore-like shape. Each securing projection 52 expediently engages in a separate securing recess 53.
  • the securing projections 52 and securing recesses 53 are arranged with at least a portion of its cross-section radially within the outline of the tube unit 18, the securing engagement in the installed state can not be canceled even if the buffer element 27 is very elastic overall. Since the holding portion 34 between the end cap 4 and the tube unit 18 is trapped axially immobile or possibly with little clearance, the securing projections 52 can not get out of engagement with the securing recesses 53, as long as the end cover 4 is mounted on the front side of the tube unit 18.
  • the buffer member 27 is secured in position transversely to the housing longitudinal direction with respect to the tube unit 18 by positive locking.
  • the securing projections 52 and securing recesses 53 each lie with a part of their cross-section inside and with another part of their cross-section outside the outline of the pipe unit 18.
  • the buffer element 27 is preferably placed in a receiving recess 55, which is formed in the tube-side end face 19 of the respective end cover 4.
  • This receiving recess 55 has a facing from the End face 20 of the tube unit 18 covered inner recess portion 56 and a radially outwardly adjoining the outer recess portion 57, which is outside the outline of the tube unit 18 and thus, seen when not mounted buffer element 27, the guide carriage 8 is open.
  • the buffer element 27 dips with its holding portion 34 into the inner recessed portion 56, while the buffer portion 35 comes to lie in the region of the outer recessed portion 57.
  • the receiving recess 55 is expediently radially open on the outside.
  • the assembly and disassembly of the buffer element 27 is also facilitated by this measure, because it can be easily detected at its outer edge 58.
  • the securing recesses 53 are located within the receiving recess 55.
  • the buffer element 27 expediently has a complementary contour following the edge profile of the receiving recess 55.
  • the mounting of the buffer element 27 is expediently carried out with not yet mounted on the tube unit 18 end cap 4. It is used in this state in the receiving recess 55, wherein the securing projections 52 engage in the formed in the wall of the receiving recess 55 securing recesses 53. It may be provided that the securing projections 52 are fixed in a slight press fit in the securing recesses 53.
  • the end cover 4 is then attached to the end face 20 of the tube unit 18 and fixed by the mentioned screw 48. By holding the holding portion 54 in the inner recessed portion 56, it can not be crushed.
  • the buffer element 27 will be designed so that the guide carriage 8 under standard conditions never impacts on the tube-side end face 19 of the end cover 4, but is previously collected and braked by the over the receiving recess 55 projecting shock receiving part 42.
  • the receiving recess 55 flanking surface portion of the tube-side end face 19 to be designed as a stop surface 62, which is set back against the shock receiving surface 43 in the housing longitudinal direction, but the absolute movement end for the guide carriage 8 pretends, if the Buffer section 35 should be excessively deformed in very strong impact of the guide carriage 8.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Surgical Instruments (AREA)
  • Materials For Medical Uses (AREA)
  • Vehicle Body Suspensions (AREA)
  • Transmission Devices (AREA)
  • Bearings For Parts Moving Linearly (AREA)

Claims (19)

  1. Entraînement linéaire sans tige de piston, avec un boîtier oblong (2) qui présente un tube de boîtier (9) et des couvercles de fermeture (4) fixés frontalement à celui-ci et dans lequel se trouve un espace de réception (3) pour une partie d'entraînement (6) mobile dans la direction longitudinale (5) du boîtier, partie qui est couplée en mouvement, par l'intermédiaire d'un coulisseau (12) traversant une fente longitudinale (26) du tube de boîtier (9), à un chariot de guidage (8) qui est guidé en déplacement dans la direction longitudinale (5) du boîtier sur un guidage linéaire (13) réuni avec le tube de boîtier (9) en une unité tubulaire (18), des moyens d'absorption de chocs en saillie dans la course de déplacement du chariot de guidage (8) étant prévus dans au moins une zone d'extrémité du boîtier (2), caractérisé en ce que les moyens d'absorption de chocs sont formés par un élément tampon (27) qui présente une section de maintien (34) s'engageant entre l'unité tubulaire (18) et le couvercle de fermeture (4) associé en vue d'une fixation solidaire du boîtier, ainsi qu'une section de tampon (35) formant saillie latéralement par rapport à l'unité tubulaire (18), la section de tampon (35) possédant à l'avant une partie d'absorption de chocs (42) élastique tournée vers le chariot de guidage (8) et étant soutenue à l'arrière par le couvercle de fermeture (4) également en saillie latéralement par rapport à l'unité tubulaire (18).
  2. Entraînement linéaire selon la revendication 1, caractérisé en ce qu'au moins la partie d'absorption de chocs (42) de l'élément tampon (27) est constituée d'un matériau de type caoutchouc élastique.
  3. Entraînement linéaire selon la revendication 1 ou 2, caractérisé en ce que l'élément tampon (27) est réalisé d'un seul tenant.
  4. Entraînement linéaire selon la revendication 3, caractérisé en ce que l'élément tampon (27) est constitué d'un matériau de type caoutchouc élastique, de préférence d'un matériau élastomère.
  5. Entraînement linéaire selon l'une des revendications 1 à 4, caractérisé en ce que l'élément tampon (27) présente une forme plate de type plaque, son plan d'extension s'étendant perpendiculairement à la direction longitudinale (5) du boîtier.
  6. Entraînement linéaire selon l'une des revendications 1 à 5, caractérisé en ce que l'élément tampon (27) est placé dans un renfoncement de réception (55) qui est réalisé dans la surface frontale (20) côté tube du couvercle de fermeture (4) associé tournée vers l'unité tubulaire (18), et qui présente une section intérieure de renfoncement (56) recouverte par la surface frontale (20) de l'unité tubulaire (18) et dans laquelle s'enfonce la section de maintien (34) de l'élément tampon (27).
  7. Entraînement linéaire selon la revendication 6, caractérisé en ce que la section de tampon (35) est placée dans une section extérieure de renfoncement (57) du renfoncement de réception (55) située à l'extérieur du contour de l'unité tubulaire (18) et forme légèrement saillie en direction du chariot de guidage (8) par rapport au couvercle de fermeture (4).
  8. Entraînement linéaire selon la revendication 7, caractérisé en ce que sur le couvercle de fermeture (4) est prévue, à côté de la section extérieure de renfoncement (57), une surface de butée (62) pour le chariot de guidage (8) qui est en retrait dans la direction longitudinale (5) du boîtier par rapport à la surface de réception de chocs (43) de la section de tampon (35).
  9. Entraînement linéaire selon l'une des revendications 6 à 8, caractérisé en ce que le renfoncement de réception (55) est ouvert radialement vers l'extérieur.
  10. Entraînement linéaire selon l'une des revendications 1 à 9, caractérisé en ce que sur l'élément tampon (27) est placée, à l'arrière, une saillie de sûreté (52) qui s'engage dans un logement de sûreté (53) du couvercle de fermeture (4) ouvert en direction de l'unité tubulaire (18), de sorte que l'élément tampon (27) est immobilisé par rapport au boîtier (5) par engagement positif transversalement à la direction longitudinale (5) du boîtier.
  11. Entraînement linéaire selon la revendication 10, caractérisé par deux saillies de sûreté (52) placées l'une à côté de l'autre et en prise chacune avec un évidement de sûreté (53) séparé.
  12. Entraînement linéaire selon la revendication 10 ou 11, caractérisé en ce que la saillie de sûreté (52) au nombre d'au moins une est réalisée à la manière d'un tenon et l'évidement de sûreté (53) correspondant est réalisé à la manière d'un perçage.
  13. Entraînement linéaire selon l'une des revendications 10 à 12, caractérisé en ce que les saillies de sûreté (52) et les évidements de sûreté (53) sont placés avec au moins une partie de leur section radialement à l'intérieur du contour de l'unité tubulaire (18).
  14. Entraînement linéaire selon l'une des revendications 10 à 13, caractérisé en ce que les saillies de sûreté (52) et les évidements de sûreté (53) sont placés avec une partie de leur section à l'intérieur et avec une autre partie de leur section à l'extérieur du contour de l'unité tubulaire (18).
  15. Entraînement linéaire selon l'une des revendications 1 à 14, caractérisé en ce que la section de maintien (34) de l'élément tampon (27) est placée entre le couvercle de fermeture (4) et le guidage linéaire (13).
  16. Entraînement linéaire selon l'une des revendications 1 à 15, caractérisé en ce que le guidage linéaire (13) est réalisé d'un seul tenant avec le tube de boîtier (9).
  17. Entraînement linéaire selon l'une des revendications 1 à 16, caractérisé en ce qu'aux deux zones d'extrémité du boîtier (2) est associé au moins un élément tampon (27).
  18. Entraînement linéaire selon l'une des revendications 1 à 17, caractérisé en ce que le guidage linéaire (13) dispose, sur ses deux côtés longitudinaux mutuellement opposés, de sections de guidage (23) coopérant avec le chariot de guidage (8), qui définissent un plan de guidage (24) par rapport auquel le plan de fente (32) contenant la fente longitudinale (26) s'étend en oblique selon un angle aigu (33).
  19. Entraînement linéaire selon l'une des revendications 1 à 18, caractérisé par une construction pouvant être actionnée par la force d'un fluide, dans laquelle la partie d'entraînement (6) est un piston pouvant être sollicité par un fluide et dans laquelle un dispositif d'étanchéité (38) de type bande est associé à la fente longitudinale (26).
EP03024743A 2002-12-03 2003-10-29 Vérin linéaire sans tige Expired - Fee Related EP1426624B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20219272U 2002-12-03
DE20219272U DE20219272U1 (de) 2002-12-03 2002-12-03 Kolbenstangenloser Linearantrieb

Publications (3)

Publication Number Publication Date
EP1426624A2 EP1426624A2 (fr) 2004-06-09
EP1426624A3 EP1426624A3 (fr) 2005-03-16
EP1426624B1 true EP1426624B1 (fr) 2008-02-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03024743A Expired - Fee Related EP1426624B1 (fr) 2002-12-03 2003-10-29 Vérin linéaire sans tige

Country Status (3)

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EP (1) EP1426624B1 (fr)
AT (1) ATE386216T1 (fr)
DE (2) DE20219272U1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113898780B (zh) * 2021-12-10 2022-03-11 中国空气动力研究与发展中心超高速空气动力研究所 一种与流量控制机构相配合的功能分离控制装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9416523U1 (de) 1994-10-14 1994-12-01 Festo Kg, 73734 Esslingen Linearantrieb
US6092456A (en) * 1997-06-11 2000-07-25 Howa Machinery, Ltd. Rodless power cylinder
JP3543065B2 (ja) * 1999-04-16 2004-07-14 Ｓｍｃ株式会社 直線作動装置
EP1182359B1 (fr) 2000-08-23 2003-01-15 FESTO AG & Co Actionneur linéaire sans tige et son carter

Also Published As

Publication number Publication date
EP1426624A2 (fr) 2004-06-09
DE20219272U1 (de) 2003-02-20
DE50309150D1 (de) 2008-03-27
EP1426624A3 (fr) 2005-03-16
ATE386216T1 (de) 2008-03-15

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