EP1510700B1 - Linearstellelement - Google Patents

Linearstellelement Download PDF

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Publication number
EP1510700B1
EP1510700B1 EP04017809A EP04017809A EP1510700B1 EP 1510700 B1 EP1510700 B1 EP 1510700B1 EP 04017809 A EP04017809 A EP 04017809A EP 04017809 A EP04017809 A EP 04017809A EP 1510700 B1 EP1510700 B1 EP 1510700B1
Authority
EP
European Patent Office
Prior art keywords
connection
expansion
connection element
linear adjustment
spiral
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
EP04017809A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1510700A1 (de
Inventor
Horst Ollefs
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.)
Walterscheid GmbH
Original Assignee
GKN Walterscheid GmbH
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 GKN Walterscheid GmbH filed Critical GKN Walterscheid GmbH
Publication of EP1510700A1 publication Critical patent/EP1510700A1/de
Application granted granted Critical
Publication of EP1510700B1 publication Critical patent/EP1510700B1/de
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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1476—Special return means
    • 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
    • F15B15/10—Characterised by the construction of the motor unit the motor being of diaphragm type
    • F15B15/103—Characterised by the construction of the motor unit the motor being of diaphragm type using inflatable bodies that contract when fluid pressure is applied, e.g. pneumatic artificial muscles or McKibben-type actuators
    • 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
    • F15B15/24—Other details, e.g. assembly with regulating devices for restricting the stroke
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/22—Joints and connections with fluid pressure responsive component

Definitions

  • JP 6-159325 A published in Patent Abstracts of Japan, Vol. 0184, No. 91 (M-1672) of 13.09.1994, describes a linear actuator having an externally fiber reinforced tubular expansion element, the ends of which are connected to a first and a second connecting element via ring-like fiber windings are connected.
  • a connecting element forms in the pressure chamber enclosed by the expansion element a kind of single-ended cylindrical space in which a rod is guided with his head. Stops, which are assigned to the connection element and the head, limit the extension of the expansion element.
  • the disadvantage is that the expansion element is only suitable for small extensions (strokes), as there is a risk of balloon-like thickening when pressurized.
  • a linear actuator which has a telescopic rod connected to a connecting element and a telescopic tube connected to the other connecting element, in which the telescopic rod is guided so that a lateral buckling of the web element is prevented.
  • a support member is provided in the form of a arranged on the outer surface of the expansion element fabric, wherein the fibers extend at a certain angle.
  • the disadvantage here is that the tissue leads to a constriction of the expansion element during elongation.
  • a separate coil spring is arranged externally around the support element, but without coming into contact with it radially. Both measures have a negative impact on energy requirements.
  • DE 39 09 370 A1 describes a telescopic cylinder, which is single-acting and can be acted upon by pressure, so that its individual telescopic sections extend under the pressurization to the extended position.
  • a mechanical retraction comprising a winch, which is driven by a motor, wherein between both an overrunning clutch is provided.
  • the free end of the rope wound on the cable winch is connected to the furthest extending inner telescopic section.
  • Such a telescopic cylinder is only for a corresponding space permitting facilities used, but not in confined spaces. It is also disadvantageous that the guide surfaces are exposed on the outside, so that environmental influences can adversely affect the function.
  • WO 85/00203 A1 relates to a valve system with a hydraulic power drive for opening the valve.
  • This power drive comprises a linear actuator which is adjustable between a shortened retraction position and an extended extended position along a longitudinal axis. It comprises a first connecting element in the form of a rod with a cover plate and a second connecting element which is likewise designed as a rod and is provided with a cover plate. Between both end plates, a bellows is provided. The bellows encloses together with the two end plates, a pressure chamber, which is provided with a connecting line for pressurizing and depressurizing, which passes through the second connecting element.
  • a support member is provided in the form of a tube that is fixedly connected to the first connection element and is guided displaceably on the second rod-shaped connection element. It supports the bellows on the outside.
  • the pressurization of the bellows is converted into an axle extension of the same.
  • Bellows undergo an extension merely by unfolding the individual folds that provide the necessary material for the extension. This becomes particularly clear when, as proposed, the bellows should be made of metal. Since the bellows itself can not generate axial forces and thus can not cause a return to the retracted position, the pressure acting on the valve body, used to push the bellows together again in the retracted position.
  • a disadvantage of this adjusting device is further that bellows for the provision of the extension must either build radially large to provide the necessary fold lengths or correspondingly have a large number of folds, as correspondingly smaller diameter correspondingly more wrinkles are required, what a corresponding increase in the installation length leads.
  • DE 10053846 A1 describes a piston-cylinder unit in which a retaining element arranged centrally in the hollow piston rod limits the extension length in that the piston comes into abutment against a stop on the rod-shaped retaining element.
  • the rod-shaped holding element is provided with a thread and screwed with this in a bore in the head cover of the cylinder housing. It is guided by the head cover of the cylinder to the outside and can be applied in rotation to adjust the extension length.
  • the stop provided at the end of the rod-shaped retaining element comes into contact exclusively with the piston and, with the exception of the limitation of the extension length, assumes no other functions.
  • the invention has for its object to provide a linear actuator that builds small and despite small dimensions in the retraction position allows a relatively large extension length and the adjustment is not adversely affected even under adverse environmental conditions and installation conditions.
  • the support element is a spiral enclosing the outer surface of the expansion element and this radially supporting, helically wound and no or a negligible tensile generating spiral having a first spiral end and a second spiral end, wherein the first spiral end with the first Connection element or a pipe element connected thereto and the second spiral end are connected to the second connection element.
  • An advantage of this design is that a hermetically sealed linear actuator is achieved, even unfavorable environmental conditions, for example, when using agricultural machinery or tractors in the field do not affect the function of the control element itself. It is hermetically sealed to the outside, so that even when used on the field, the function is not adversely affected even when settling dirt or freezing wetness.
  • a further advantage is that no sliding guides, as they are usually provided with adjusting cylinders, are present, whereby a substantially wear-free work is possible even in dirty space.
  • the expansion element is supported in the radial direction, so that when pressure is applied only the possibility of an axial expansion along the longitudinal axis is given.
  • the retraction force is determined by the elastic elongation of the expansion element, i. the wall itself generates, so that the linear actuator can occupy its retraction position alone under the reset effect of the elasticity of the expansion element.
  • a pressure medium either compressed air or even pressure fluid come into question.
  • the helically wound spiral is arranged around the outer surface of the expansion element and exerts itself no spring action, d. H. does not generate any traction.
  • the connecting line is represented by a passage bore of the first connection element or a in this einitzendes pipe element.
  • a pipe element for example, if the associated connection element, in which the pipe element is used, consists of a plastic or of a material which corresponds to that of the expansion element, but has a greater hardness.
  • the retaining element in addition, for example, assume a support function for the expansion element against buckling, it makes sense to extend this telescopically extendable and shortenable, wherein telescopically guided telescopic tubes and a telescopic rod are present, their movement along the longitudinal axis to each other is limited.
  • Another advantage of this design is that with small installation length a large stroke can be achieved.
  • a compact design results when, for example, the first telescopic tube sits on the first connection element and only then the expansion element is fixed with its first end portion. The attachment to the first connection element is thus carried out with the interposition of the telescopic tube.
  • the pipe element associated therewith can be used by the angled end of the spiral winding being laid around the pipe element.
  • the expansion element is made of a rubber material that is soft and elastic.
  • connection elements may consist essentially of the same material as the expansion element, but have a greater hardness. However, it is also possible that the connection elements made of metal or plastic.
  • connection can be produced, for example, by gluing or scorching.
  • expansion element and the connection elements consist of the same material, it is possible, for example, to carry out at least one end section of the expansion element in one piece with the associated connection element.
  • the linear actuator is shown in the retracted position.
  • the linear actuator is shown in solid lines in the retracted position with the length L between the terminal holes and beyond schematically by dotted lines to the length L1 shown extended by pressurization.
  • the linear actuator comprises a first connection element 1, which is provided with a transverse to the longitudinal axis X extending mounting hole 2, to set the first connection element 1 on a component on which it is supported.
  • the first connection element 1 has a projection 3, which is provided with a centrally arranged on the longitudinal axis X arranged central bore 4, in which an introduced from the outside oblique bore 5 opens.
  • a pipe element 6 is used, which is open to the outside and to the central bore 4.
  • the outer surface of the projection 3 forms a circular cylindrical seat surface. 7
  • the linear actuator further comprises a second connection element 8, which has a mounting hole 9, which also extends transversely to the longitudinal axis X.
  • a bore 10 is introduced.
  • the portion of the second connection element 8, which forms the outer surface to the bore 10, is designed as a circular cylindrical seat surface 11.
  • a holding element 12 is effective.
  • This comprises a first telescopic tube 13, which sits firmly and tightly on the circular-cylindrical seat surface 7 of the first connection element 1.
  • the first telescopic tube 13 has an enlarged diameter seat portion 14.
  • the seat portion 14th The distal end of the first telescopic tube 13 is provided with an inwardly directed collar 15 which projects in the direction of the longitudinal axis X.
  • a second telescopic tube 16 is received limited movable to the first telescopic tube 13. It has an enlarged diameter tube end 17, with which it can be supported in the retracted position of the linear actuator against the end face of the projection 3 of the first connection element 1. This pipe end 17 is enlarged so that when extending the pipe end 17 comes against the collar 15 of the first telescopic tube 13 to the plant.
  • the second connection element 8 is associated with a telescopic rod 19 which sits with a portion 20 in the bore 10 of the second connection element 8, and pressed therein, glued or threaded, wherein the bore 10 is designed as a threaded bore is fixed.
  • the telescoping rod 19 Disposed from this section 20, the telescoping rod 19 is provided with a diameter-enlarged collar 21 which, when extended against the inward, ie. on the longitudinal axis X, directed collar 18 of the second telescopic tube 16 comes to rest, so that in total in the extended position, the extension length L1, starting from the insertion length L, is mechanically limited by the support member 12 and additionally the expansion element 22 is supported against buckling ,
  • tubular expansion element 22 provided with a smooth inner and outer surface, which consists of a material which allows an elastic extension and shortening of the same and beyond air or liquid-tight.
  • This tubular expansion element 22 sits tightly with its first end portion 23 on the seat portion 14 of the first telescopic tube 13, which in turn sits tightly with this seat portion 14 on the seat surface 7 of the first connection element 1.
  • the connection can be made by vulcanization to the first telescopic tube 13. But it is also an adhesive bond or attachment by means of a support ring, which acts on the expansion element 22 radially conceivable.
  • the second End portion 24 of the expansion element 22 is seated on the seat surface 11 of the second connection element 8. It is also tightly and firmly connected with this.
  • a pressure chamber 29 is formed between the inner surface of the tubular expansion element 22 and the first connection element 1 and the second connection element 8.
  • the outer surface 25 of the expansion element 22 is surrounded by a support element in the form of a spiral 26, which has a low pitch, so that many turns are present.
  • the first spiral end 27 of this spiral 26 is fixed to the tubular element 6 of the first connection element 1.
  • the second spiral end 28 of the spiral 26 is fixed to a shoulder of the second connecting element 8.
  • both a resilient bias of the expansion element 22 and the spiral 26 takes place in the direction of the longitudinal axis X. If now a pressure relief of the pressure chamber 29, the linear actuator is returned elastically, for example, from the extension length L1 in the retracted position with the installation length L.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Actuator (AREA)
  • Measuring Fluid Pressure (AREA)
  • Fluid-Damping Devices (AREA)
EP04017809A 2003-08-27 2004-07-28 Linearstellelement Expired - Fee Related EP1510700B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10339819A DE10339819A1 (de) 2003-08-27 2003-08-27 Linearstellelement
DE10339819 2003-08-27

Publications (2)

Publication Number Publication Date
EP1510700A1 EP1510700A1 (de) 2005-03-02
EP1510700B1 true EP1510700B1 (de) 2006-10-04

Family

ID=34089253

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04017809A Expired - Fee Related EP1510700B1 (de) 2003-08-27 2004-07-28 Linearstellelement

Country Status (5)

Country Link
US (1) US20050047849A1 (pt)
EP (1) EP1510700B1 (pt)
JP (1) JP2005069487A (pt)
BR (1) BRPI0403593A (pt)
DE (2) DE10339819A1 (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011121882B4 (de) * 2011-12-21 2019-11-28 Festo Ag & Co. Kg Arbeitsvorrichtung mit mindestens einem Membranaktor

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB697707A (en) * 1950-12-21 1953-09-30 American Steel Foundries Improvements in a fluid pressure responsive device
DE8003846U1 (de) * 1980-02-14 1980-05-29 Maschinenfabriken Bernard Krone Gmbh, 4441 Spelle Hydraulisch oder pneumatisch betätigte einfachwirkende Kolben-Zylinder-Anordnung
SE441546B (sv) * 1983-06-23 1985-10-14 Ssab Svenskt Stal Ab Ventilanordning for reglering av ett flode inuti en rorledning
US4860639A (en) * 1984-12-11 1989-08-29 Bridgestone Corporation Flexible tubular wall actuator with end-mounted strain gauge
US4848168A (en) * 1987-04-13 1989-07-18 Bridgestone Corporation Traveling device moving along elongated member
DE3909370A1 (de) * 1989-03-22 1990-09-27 Harry Gielnik Doppeltwirkender teleskop-zylinder mit mechanischem rueckzug
JP2846344B2 (ja) * 1989-06-19 1999-01-13 株式会社ブリヂストン 弾性伸長体を用いたアクチュエータ
JPH0324304A (ja) * 1989-06-20 1991-02-01 Bridgestone Corp 弾性伸長体を用いたアクチュエータ
JP2703165B2 (ja) * 1992-11-13 1998-01-26 シーケーディ株式会社 直進形柔軟アクチュエータ
DE19725591A1 (de) * 1996-10-22 1998-12-24 Homann Werner Dipl Ing Fh Stellantrieb zur Umwandlung der Energie eines Fluids in eine mechanische Kraft
JP2001132708A (ja) * 1999-11-02 2001-05-18 Smc Corp ストローク調整可能な流体圧シリンダ
DE10139861B4 (de) * 2001-08-14 2004-07-01 Daimlerchrysler Ag Radaufhängung eines Kraftfahrzeugs

Also Published As

Publication number Publication date
JP2005069487A (ja) 2005-03-17
DE10339819A1 (de) 2005-03-31
DE502004001649D1 (de) 2006-11-16
US20050047849A1 (en) 2005-03-03
BRPI0403593A (pt) 2005-06-07
EP1510700A1 (de) 2005-03-02

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