EP1065388B1 - Linear drive - Google Patents

Linear drive Download PDF

Info

Publication number
EP1065388B1
EP1065388B1 EP00112641A EP00112641A EP1065388B1 EP 1065388 B1 EP1065388 B1 EP 1065388B1 EP 00112641 A EP00112641 A EP 00112641A EP 00112641 A EP00112641 A EP 00112641A EP 1065388 B1 EP1065388 B1 EP 1065388B1
Authority
EP
European Patent Office
Prior art keywords
housing
linear drive
retaining wall
sealing ring
drive according
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 - Lifetime
Application number
EP00112641A
Other languages
German (de)
French (fr)
Other versions
EP1065388A1 (en
Inventor
Christoph Keicher
Dieter Waldmann
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 EP1065388A1 publication Critical patent/EP1065388A1/en
Application granted granted Critical
Publication of EP1065388B1 publication Critical patent/EP1065388B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F15B15/1433—End caps

Definitions

  • the invention relates to a linear drive, as well as he from the Document EP-A-911 530 is known especially for Applications in the food and / or medical industry.
  • the over has a perforated retaining wall, with which he on the housing of the linear drive is attached or plugged on a sealing ring coaxial to the housing on both sides of the retaining wall placed so that all problem areas are sealed.
  • the outer surface of the sealing rings is shaped in this way is that between the two wall sections of this outer surface and the respectively adjacent surface section of the Transition angle included in the housing or the holder is more than 90 °. It has been shown that the Settling and adherence of contaminants effectively reduced can be. Nonetheless, contamination can build up never be completely excluded. However, by Sealing rings made of corrosion-resistant and non-toxic material chemical or biochemical reactions effectively prevented and thereby hygiene at a high level held.
  • the housing is conveniently with the front end portion of its main body in the relevant receiving hole inserted or through this Inserted the receiving hole, being from the opposite Side attached a fastener of the housing is, for example, a screwed onto the housing base and screw nut that can be clamped with the holder.
  • a sealing ring expediently comes also on the side of the fastener, which here for Housing is added between this fastener and the holder.
  • At least one holder expediently has one extending at right angles to the associated retaining wall Fastening foot for fastening to a support structure.
  • the outer surface has a concave shape. Indeed under certain circumstances a convex shape would also be conceivable, in any case you look at the shape of those Orientate surface sections that are adjacent to relevant sealing ring are present.
  • At least one sealing ring of the sealing arrangement can at least partially sit in an annular recess. In this way it is very easy to create a flush Transition between the outer surface of the sealing ring and the adjacent surface section of the housing and / or Realize holder.
  • the sealing arrangement of the linear drive has more Sealing rings, for example for mutual sealing individual housing components, these are expedient also according to the specifications of the seal between the Designed housing and the sealing rings provided holders. You can in particular also in annular depressions be kept. In all cases it is an advantage if the width of the annular recess is less than that the sealing ring held in it before assembly, so that the assembled sealing ring is crushed axially, which the desired shape of its outer surface Can have consequences.
  • the two side flanks of the each assigned recess formed on separate components are, for example on the one hand on the housing of the linear drive and on the other hand on one of the holders.
  • the sealing ring can thus be very easily removed with the holder Place an annular recess that is open on the side. So that However, sealing ring during the subsequent assembly of the holder is not crushed, are preferably on the two parts corresponding stop surfaces are provided, that define the minimum width of the annular recess.
  • the linear drive 1 shown in FIG. 1 is fluid-operated Design executed, which is a pneumatic or hydraulically operated cylinder.
  • the linear drive 1 is attached to a support structure 2, for example a machine frame or a building wall, and is located inside a room 3, in which, for example Manufacturing and / or packaging work in the sector of food, medical and / or semiconductor technology be performed. In such a room there are the highest Hygiene requirements.
  • the linear drive 1 has an elongated housing 4, the present an elongated housing base 5 and a has fastener 6 arranged thereon.
  • the housing base body 5 has a tubular middle part 7, on the two end faces of each end cover 8, 9 is arranged. These parts delimit an interior 12, which is a drive part 13 designed as a piston receives. The latter divides the interior 12 under sealing axially in two working spaces 14, 15, the seal by a provided on the outer circumference of the drive part 13 and with the peripheral surface of the interior 12 in dynamic Sealing contact standing seal 16 is guaranteed.
  • Each working space 14, 15 has a separate fluid channel 17, 18 in connection, which on the other hand on the outer surface of the Housing main body 5 opens out where a further Fluid line can be connected.
  • the fluid channels 17, 18 run expediently in the two end caps 8, 9.
  • the movement of the drive part 13 can be done outside the housing 4 tap on a power transmission part 22. This is executed in the embodiment of a rod and firmly connected to the drive part 13, wherein it is one of the End cover 8 slidably interspersed with sealing.
  • This end cover is hereinafter referred to as the front end cover Designated 8.
  • the linear drive 1 is used in the exemplary embodiment two holders 24, 25 attached to the support structure 2.
  • the linear drive 1 is spaced by these holders 24, 25 held to the support structure 2.
  • the two holders 24, 25 are opposite to each other front housing end portions 26, 27 of the housing 4 assigned.
  • One, hereinafter as the front holder 24 designated holder sits on the front end cover 8 of the housing base body 5, while the other, hereinafter referred to as rear holder 25 on the other, rear end cover 9 is attached.
  • the two holders can be largely as shown have identical shape. They contain in the embodiment one holding wall 32, 33 and one each fastening foot extending at right angles to the holding wall 32, 33 34. Via fasteners indicated only by dash-dotted lines 35 is the mounting foot 34 in such a way Support structure 2 fixes that the associated holding wall 32, 33rd preferably protrudes at right angles from the support structure 2.
  • the two spaced-apart holding walls run here 32, 33 expediently in mutually parallel planes.
  • the retaining wall 33 of the rear holder 25 is closed and the axially oriented rear end face 36 of the housing base body 5. It lies between this closed retaining wall 33 and the rear housing end portion 27 a mechanical connection through which the housing 4 fixed to the closed holding wall 33 is. In the exemplary embodiment, this is achieved by a form-fitting Connection realized by the housing 4 on the back has at least one axial projection 37 which into a complementary recess 38 of the uninterrupted, closed retaining wall 33 immersed positively.
  • the holding wall 32 of the front holder 24 is perforated and has via a continuous receiving hole 42 with which they open the front housing end portion 26 is attached.
  • the front end cover 8 engages in the receiving hole 42 and cooperates with the fastening element 6, that of the opposite side of the housing base body 5 forth on the front end cover 8 is fixed.
  • the housing base 5 is supported with its forward facing front face 43 on the back the perforated retaining wall 32 off while the fastener 6 with a backward-facing loading surface 44 to the front of the perforated retaining wall 32 acts.
  • the latter is thus between the front End face 43 and the loading surface 44 firmly clamped.
  • the fastener 6 is in the embodiment as Screw nut running on an external thread of the in the Receiving hole 42 protruding portion of the housing body 5 is detachably screwed on. It encloses the rod-like power transmission part 22 in a coaxial arrangement and carries an annular seal 45 which with the Outer surface of the power transmission part 22 dynamically sealing interacts to prevent contamination from entering the prevent area covered by the fastener 6.
  • the transition areas 46 between the holders 24, 25 and neighboring housing zones are one by sealing rings 47 Sealing arrangement 48 statically sealed. In this way is prevented that otherwise in the transition areas 46 existing fine spaces interfering impurities enter and deposit.
  • the sealing rings 47 exist from a preferably rubber-elastic sealing material, which is expediently corrosion-resistant and none has toxic properties. We recommend here for example materials under the designations "Silicone” or “Teflon” are known. With such a Material is assured that no chemical or biochemical Reactions occur when the sealing rings 47 with in Room 3 liquid or solid substances or Contaminants come into contact.
  • the front holder 24 is assigned two sealing rings 47. They also enclose the housing 4 with a coaxial orientation, one of the sealing rings 47 behind the perforated retaining wall 32 sits while the other sealing ring 47 of the perforated retaining wall 32 is upstream. Each sealing ring 47 is on the one hand with the assigned area of the perforated retaining wall 32 and on the other hand with the front housing end section 26 in Sealing contact.
  • the back of the front holder cooperates 24 associated sealing rings 47 with the front end cover 8, while the front sealing ring 47 with the fastener 6 cooperates.
  • the contact areas to the perforated retaining wall 32 are annular and lie radially outside of the receiving hole 42.
  • the ring is circumferential Outer surface 52 of the sealing rings 47 designed so that that between their edge regions 53, 53 'and the neighboring one Surface section 54, 54 'of the housing 4 or holder 25 included transition angles "a" greater than 90 ° is.
  • transition angles "a" greater than 90 ° is.
  • Figure 2 are the for better understanding Edge areas 53, 53 'tangents 55, 55' and the tangents applied to the two surface sections 54, 54 ' 56, 56 'indicated by dash-dotted lines, for angle determination can be used.
  • the aforementioned configuration of the transition angle "a” applies expediently also for other sealing rings 57 of the sealing arrangement 48, in the outer area of the linear drive 1 for sealing the transition areas between individual housing components be used. It can be seen in FIG. 1 two such sealing rings 57, which in the transition area between the tubular middle part 7 and a respective end cover 8, 9 are placed. However, while with the holders 24, 25 cooperating sealing rings 47 a have a concavely shaped outer surface 52, this outer surface 52 'of the other sealing rings 57 are convex. As a rule, the design will primarily be based on what area conditions prevail in the neighborhood, so that zones with preferred dirt deposition are prevented become.
  • All sealing rings 47, 57 are expediently fixed in place, that they are at least partially in a coaxial to the housing 4 arranged annular recess 58 sit.
  • the axially opposite lateral recess flanks 62, 62 'of a respective one Indentation 58 on one of the two against each other components to be sealed are provided. So it is found in the recesses 58 assigned to the holders 24, 25, the each a recess flank 62 on the housing 4 and each another recess flank 62 'on the associated holder 24, 25.
  • Sealing rings 47 are on Housing 4 and on the relevant holder 24, 25 axially Opposing stop surfaces 63, 63 'are provided which Specification of a minimum width of the assigned ring-shaped Hold recess 58 together. But you will expediently provide that this minimum width of the annular recess 58 is less than the width of the section of the associated sealing ring 47 held therein, considered before assembly. In this way the Sealing ring 47 a certain axial crushing during assembly, which results in a reliable sealing contact.
  • the anti-crushing measures mentioned can also apply to all additional sealing rings 57 may be provided, however not necessarily required if the Guaranteed the necessary assembly care is. So are the other two in the embodiment Sealing rings 57 no such crushing safety measures assigned, although they would be entirely possible. you has rather provided 57 for these additional sealing rings, that the components flanks 62, 62 ' during assembly so far that the relevant sealing ring 57 experiences an axial crushing, from what a predetermined shape of the sealing ring outer surface 52 'results. By specifying a certain width dimension a recess 58 can thus the contour of the outer surface of the relevant sealing ring can be specified, for example the degree of convex bulge. To be reproducible here However, it is also possible to create relationships here the desired width dimension of the relevant depression to be specified in advance by stop surfaces 63, 63 '.
  • a linear actuator 1 used holder of the depends on the respective circumstances. So could a linear actuator for example, using only a holder be a holder with perforated or can act with the retaining wall closed. Can too for fastening a linear drive 1 simultaneously Holders of identical type can be used, be it exclusively or in addition to other holders.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Sealing Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Valve Device For Special Equipments (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

The drive has a longitudinal housing containing (4) a movable drive section (13) as well as a holder (24,25) for attaching the linear drive to a support structure (2). The holder is attached to either one end of the housing (27) by a closed holder wall (33) or at the other end of the housing (26) by a perforated holder wall (32). A seal arrangement (48) is provided for sealing the transfer region (46) between the housing and the holder, where the arrangement consists of sealing rings. The rings are designed so as to have a transfer angle at their sides in cross section which is greater than 90 degrees. The seal ring comprises a corrosion-resistant and non-toxic material.

Description

Die Erfindung betrifft einen Linearantrieb, sowie er beilspielsweise aus dem Dokument EP-A-911 530 bekannt ist insbesondere für Einsätze in der Lebensmittel- und/oder Medizinindustrie.The invention relates to a linear drive, as well as he from the Document EP-A-911 530 is known especially for Applications in the food and / or medical industry.

In der Lebensmittel- und/oder Medizinindustrie, aber auch auf dem Sektor der Halbleiterfertigung, bestehen sehr hohe Hygieneanforderungen. Es ist dort stets ein Problem, zur Betätigung von Bauteilen oder Einrichtungen eingesetzte Linearantriebe bereitzustellen, die wenig verschmutzungsanfällig sind und sich leicht reinigen lassen. Zwar wäre es denkbar, die Linearantriebe unter Verwendung geeigneter Abschirmwände zu kapseln und auf diese Weise vom eigentlichen Einsatzort abzuschirmen. Abgesehen von dem daraus resultierenden erhöhten Bauaufwand ist damit aber auch ein Verlust der Übersichtlichkeit und eine eingeschränkte Zugänglichkeit für Wartungs- und Reparaturarbeiten verbunden.In the food and / or medical industry, but also on in the semiconductor manufacturing sector, there are very high hygiene requirements. There is always a problem there to operate linear drives used by components or devices To be provided that are less susceptible to pollution and easy to clean. It would be conceivable that Linear drives using suitable shielding walls encapsulate and shield it from the actual place of use. Aside from the resulting increased Construction effort is also a loss of clarity and limited accessibility for maintenance and Associated repair work.

Es ist daher die Aufgabe der vorliegenden Erfindung, einen Linearantrieb der eingangs genannten Art zu schaffen, der im installierten Zustand wenig verschmutzungsanfällig und leicht zu reinigen ist.It is therefore the object of the present invention, one To create a linear drive of the type mentioned in the installed condition less susceptible to contamination and light is to be cleaned.

Gelöst wird diese Aufgabe durch einen Linearantrieb, insbesondere für Einsätze in der Lebensmittel- und/oder Medizinindustrie,

  • mit einem ein bewegliches Antriebsteil enthaltenden länglichen Gehäuse, das an einem oder beiden seiner stirnseitigen Gehäuse-Endabschnitte mit einem zur Befestigung des Linearantriebes an einer Tragstruktur dienenden Halter versehen ist, wobei der betreffende Halter entweder mit einer geschlossenen Haltewand stirnseitig an den zugeordneten Gehäuse-Endabschnitt angesetzt oder mit einer gelochten Haltewand auf den zugeordneten Gehäuse-Endabschnitt aufgesetzt ist,
  • und mit einer Dichtungsanordnung zumindest zur Abdichtung der Übergangsbereiche zwischen dem Gehäuse und dem jeweiligen Halter, die bei einem Halter mit geschlossener Haltewand einen das Gehäuse umschließenden und mit der geschlossenen Haltewand in Dichtkontakt stehenden Dichtring und bei einem Halter mit gelochter Haltewand zwei auf entgegengesetzten Seiten der gelochten Haltewand koaxial zum Gehäuse angeordnete und mit der gelochten Haltewand in Dichtkontakt stehende Dichtringe aufweist, wobei die umlaufende Außenfläche eines jeweiligen Dichtringes so gestaltet ist, daß der zwischen ihren beiden Randabschnitten und dem jeweils benachbarten Flächenabschnitt des Gehäuses und des Halters eingeschlossene Übergangswinkel größer als 90° ist, und wobei ein jeweiliger Dichtring aus korrosionsbeständigem und nicht-toxischem Material besteht.
This task is solved by a linear drive, especially for use in the food and / or medical industry,
  • with an elongated housing containing a movable drive part, which is provided on one or both of its end housing end sections with a holder serving to fasten the linear drive to a support structure, the holder in question either being attached to the associated housing end section on the end face with a closed retaining wall or is placed on the assigned housing end section with a perforated retaining wall,
  • and with a sealing arrangement at least for sealing the transition areas between the housing and the respective holder, which in a holder with a closed holding wall encloses the housing and is in sealing contact with the closed holding wall, and in a holder with a perforated holding wall two on opposite sides of the perforated Holding wall arranged coaxially to the housing and in sealing contact with the perforated holding wall, the circumferential outer surface of each sealing ring is designed such that the transition angle enclosed between its two edge sections and the respectively adjacent surface section of the housing and the holder is greater than 90 ° , and wherein a respective sealing ring consists of corrosion-resistant and non-toxic material.

Bei der Montage eines Linearantriebes an einer geeigneten Tragstruktur, beispielsweise an einer Gebäudewand sind vor allem die Übergangsbereiche zwischen dem Gehäuse des Linearantriebes und dem oder den zu seiner Befestigung verwendeten Halter bzw. Haltern sehr verschmutzungsanfällig. In den dort vorhandenen Spalten und Ritzen lagern sich flüssige oder feste Verunreinigungen bevorzugt ab und lassen sich auch kaum mehr entfernen. Durch die erfindungsgemäße Ausgestaltung ist nun vorgesehen, die Übergangsbereiche zwischen einem jeweiligen verwendeten Halter und dem Gehäuse mit einem Dichtring abzudichten, so daß Verunreinigungen an einem Eindringen in die Struktur des Linearantriebes abgehalten werden. Ist ein Halter mit einer geschlossenen Haltewand lediglich stirnseitig an das Gehäuse des Linearantriebes angesetzt, genügt es, einen einzigen Dichtring auf der Gehäuseseite im Übergangsbereich zwischen dem Gehäuse und der geschlossenen Haltewand zu plazieren. Kommt hingegen ein Halter zum Einsatz, der über eine gelochte Haltewand verfügt, mit der er auf das Gehäuse des Linearantriebes aufgesetzt bzw. aufgesteckt ist, wird auf beiden Seiten der Haltewand ein zum Gehäuse koaxialer Dichtring plaziert, so daß alle Problemzonen abgedichtet sind. Es kommt hinzu, daß die Außenfläche der Dichtringe so geformt ist, daß der zwischen den beiden Wandabschnitten dieser Außenfläche und dem jeweils benachbarten Flächenabschnitt des Gehäuses bzw. des Halters eingeschlossene Übergangswinkel mehr als 90° beträgt. Es hat sich erwiesen, daß dadurch das Absetzen und Anhaften von Verunreinigungen wirksam reduziert werden kann. Gleichwohl kann eine Ablagerung von Verunreinigungen nie gänzlich ausgeschlossen werden. Indem jedoch die Dichtringe aus korrosionsbeständigem und nicht-toxischem Material bestehen, wird chemischen oder biochemischen Reaktionen wirksam vorgebeugt und dadurch die Hygiene auf hohem Niveau gehalten. When installing a linear actuator on a suitable one Support structure, for example on a building wall, are in front especially the transition areas between the housing of the linear drive and the one or those used for its attachment Holders or holders very susceptible to contamination. In there existing gaps and crevices are stored in liquid or solid form Prevents contamination and can hardly be removed remove more. Due to the configuration according to the invention now provided the transition areas between each used holder and the housing with a sealing ring seal so that contaminants from penetrating into the structure of the linear drive can be held. Is a Holder with a closed retaining wall only on the front attached to the housing of the linear drive, it is sufficient a single sealing ring on the housing side in the transition area between the housing and the closed retaining wall place. However, if a holder is used, the over has a perforated retaining wall, with which he on the housing of the linear drive is attached or plugged on a sealing ring coaxial to the housing on both sides of the retaining wall placed so that all problem areas are sealed. It In addition, the outer surface of the sealing rings is shaped in this way is that between the two wall sections of this outer surface and the respectively adjacent surface section of the Transition angle included in the housing or the holder is more than 90 °. It has been shown that the Settling and adherence of contaminants effectively reduced can be. Nonetheless, contamination can build up never be completely excluded. However, by Sealing rings made of corrosion-resistant and non-toxic material chemical or biochemical reactions effectively prevented and thereby hygiene at a high level held.

Vorteilhafte Weiterbildungen der Erfindung gehen aus den Unteransprüchen hervor.Advantageous developments of the invention emerge from the subclaims out.

Soll der Linearantrieb über einen Halter mit gelochter Haltewand befestigt werden, wird das Gehäuse zweckmäßigerweise mit dem stirnseitigen Endabschnitt seines Gehäusegrundkörpers in das betreffende Aufnahmeloch eingesteckt bzw. durch dieses Aufnahmeloch hindurchgesteckt, wobei von der entgegengesetzten Seite ein Befestigungselement des Gehäuses angebracht wird, beispielsweise eine auf den Gehäusegrundkörper aufschraubbare und mit dem Halter verspannbare Schraubmutter. Ein Dichtungsring kommt in diesem Falle zweckmäßigerweise auch auf der Seite des Befestigungselementes, das hier zum Gehäuse hinzugerechnet wird, zwischen diesem Befestigungselement und dem Halter zu liegen.If the linear actuator is to be mounted using a holder with a perforated retaining wall are attached, the housing is conveniently with the front end portion of its main body in the relevant receiving hole inserted or through this Inserted the receiving hole, being from the opposite Side attached a fastener of the housing is, for example, a screwed onto the housing base and screw nut that can be clamped with the holder. In this case, a sealing ring expediently comes also on the side of the fastener, which here for Housing is added between this fastener and the holder.

Mindestens ein Halter verfügt zweckmäßigerweise über einen sich rechtwinkelig zur zugeordneten Haltewand erstreckenden Befestigungsfuß zur Befestigung an einer Tragstruktur.At least one holder expediently has one extending at right angles to the associated retaining wall Fastening foot for fastening to a support structure.

Bei einer besonders vorteilhaften Gestaltung der Dichtringe verfügt die Außenfläche über eine konkave Formgebung. Allerdings wäre unter Umständen auch eine konvexe Formgebung denkbar, wobei man sich in jedem Falle an der Formgebung derjenigen Flächenabschnitte orientieren wird, die benachbart zum betreffenden Dichtring vorhanden sind.With a particularly advantageous design of the sealing rings the outer surface has a concave shape. Indeed under certain circumstances a convex shape would also be conceivable, in any case you look at the shape of those Orientate surface sections that are adjacent to relevant sealing ring are present.

Mindestens ein Dichtring der Dichtungsanordnung kann zumindest teilweise in einer ringförmigen Vertiefung einsitzen. Auf diese Weise läßt sich bei Bedarf sehr einfach ein bündiger Übergang zwischen der Außenfläche des Dichtringes und den benachbarten Flächenabschnittes des Gehäuses und/oder des Halters realisieren.At least one sealing ring of the sealing arrangement can at least partially sit in an annular recess. In this way it is very easy to create a flush Transition between the outer surface of the sealing ring and the adjacent surface section of the housing and / or Realize holder.

Verfügt die Dichtungsanordnung des Linearantriebes über weitere Dichtringe, beispielsweise zur gegenseitigen Abdichtung einzelner Gehäusebestandteile, sind diese zweckmäßigerweise ebenfalls nach den Vorgaben der zur Abdichtung zwischen dem Gehäuse und den Haltern vorgesehenen Dichtringen konzipiert. Sie können insbesondere ebenfalls in ringförmigen Vertiefungen gehalten sein. In allen Fällen ist es von Vorteil, wenn die Breite der ringförmigen Vertiefung geringer ist als diejenige des darin gehaltenen Dichtringes vor dessen Montage, so daß der montierte Dichtring eine axiale Quetschung erfährt, die die gewünschte Formgebung seiner Außenfläche zur Folge haben kann.The sealing arrangement of the linear drive has more Sealing rings, for example for mutual sealing individual housing components, these are expedient also according to the specifications of the seal between the Designed housing and the sealing rings provided holders. You can in particular also in annular depressions be kept. In all cases it is an advantage if the width of the annular recess is less than that the sealing ring held in it before assembly, so that the assembled sealing ring is crushed axially, which the desired shape of its outer surface Can have consequences.

Zugunsten einer einfachen Montage der Dichtringe ist zweckmäßigerweise vorgesehen, daß die beiden seitlichen Flanken der jeweils zugeordneten Vertiefung an separaten Bauteilen ausgebildet sind, also beispielsweise zum einen am Gehäuse des Linearantriebes und zum anderen an einem der Halter. Der Dichtring läßt sich somit bei entferntem Halter sehr bequem in der seitlich offenen ringförmigen Vertiefung plazieren. Damit der Dichtring jedoch bei der anschließenden Montage des Halters nicht zerquetscht wird, sind vorzugsweise an den beiden Teilen miteinander korrespondierende Anschlagflächen vorgesehen, die die minimale Breite der ringförmigen Vertiefung definieren. In favor of a simple assembly of the sealing rings is expedient provided that the two side flanks of the each assigned recess formed on separate components are, for example on the one hand on the housing of the linear drive and on the other hand on one of the holders. The sealing ring can thus be very easily removed with the holder Place an annular recess that is open on the side. So that However, sealing ring during the subsequent assembly of the holder is not crushed, are preferably on the two parts corresponding stop surfaces are provided, that define the minimum width of the annular recess.

Nachfolgend wird die Erfindung anhand der beiliegenden Zeichnung näher erläutert. In dieser zeigen:

Figur 1
ein bevorzugtes Ausführungsbeispiel des erfindungsgemäßen Linearantriebes in Gestalt eines fluidbetätigten Arbeitszylinders im Längsschnitt, und
Figur 2
den in Figur markierten Ausschnitt II in vergrößerter Darstellung.
The invention is explained in more detail below with reference to the accompanying drawing. In this show:
Figure 1
a preferred embodiment of the linear drive according to the invention in the form of a fluid-operated cylinder in longitudinal section, and
Figure 2
the detail II marked in the figure in an enlarged view.

Der in Figur 1 gezeigte Linearantrieb 1 ist in fluidbetätigter Bauart ausgeführt, wobei es sich um einen pneumatisch oder hydraulisch betätigten Arbeitszylinder handelt.The linear drive 1 shown in FIG. 1 is fluid-operated Design executed, which is a pneumatic or hydraulically operated cylinder.

Der Linearantrieb 1 ist an einer Tragstruktur 2 befestigt, beispielsweise ein Maschinengestell oder eine Bauwerkswand, und befindet sich im Innern eines Raumes 3, in dem beispielsweise Herstellungs- und/oder Verpackungsarbeiten auf dem Sektor der Lebensmittel-, Medizin- und/oder Halbleitertechnik durchgeführt werden. In einem solchen Raum herrschen höchste Hygieneansprüche.The linear drive 1 is attached to a support structure 2, for example a machine frame or a building wall, and is located inside a room 3, in which, for example Manufacturing and / or packaging work in the sector of food, medical and / or semiconductor technology be performed. In such a room there are the highest Hygiene requirements.

Der Linearantrieb 1 verfügt über ein längliches Gehäuse 4, das vorliegend einen länglichen Gehäuse-Grundkörper 5 und ein an diesem angeordnetes Befestigungselement 6 aufweist.The linear drive 1 has an elongated housing 4, the present an elongated housing base 5 and a has fastener 6 arranged thereon.

Der Gehäuse-Grundkörper 5 verfügt über ein rohrförmiges Mittelteil 7, an dessen beiden Stirnseiten jeweils ein Abschlußdeckel 8, 9 angeordnet ist. Diese Teile begrenzen einen Innenraum 12, der ein als Kolben ausgeführtes Antriebsteil 13 aufnimmt. Letzteres unterteilt den Innenraum 12 unter Abdichtung axial in zwei Arbeitsräume 14, 15, wobei die Abdichtung durch eine am Außenumfang des Antriebsteils 13 vorgesehene und mit der Umfangsfläche des Innenraumes 12 in dynamischem Dichtkontakt stehende Dichtung 16 gewährleistet wird.The housing base body 5 has a tubular middle part 7, on the two end faces of each end cover 8, 9 is arranged. These parts delimit an interior 12, which is a drive part 13 designed as a piston receives. The latter divides the interior 12 under sealing axially in two working spaces 14, 15, the seal by a provided on the outer circumference of the drive part 13 and with the peripheral surface of the interior 12 in dynamic Sealing contact standing seal 16 is guaranteed.

Jeder Arbeitsraum 14, 15 steht mit einem separaten Fluidkanal 17, 18 in Verbindung, der andererseits an der Außenfläche des Gehäuse-Grundkörpers 5 ausmündet, wo sich eine weiterführende Fluidleitung anschließen läßt. Die Fluidkanäle 17, 18 verlaufen zweckmäßigerweise in den beiden Abschlußdeckeln 8, 9.Each working space 14, 15 has a separate fluid channel 17, 18 in connection, which on the other hand on the outer surface of the Housing main body 5 opens out where a further Fluid line can be connected. The fluid channels 17, 18 run expediently in the two end caps 8, 9.

Durch gesteuerte Zufuhr und Abfuhr eines fluidischen Druckmediums bezüglich den Arbeitsräumen 14, 15 kann das Antriebsteil 13 in an sich bekannter Weise zu einer hin- und hergehenden Linearbewegung in Richtung der Längsachse 23 des Gehäuses 4 veranlaßt werden.Through controlled supply and discharge of a fluid pressure medium with respect to the working spaces 14, 15, the drive part 13 in a manner known per se to a back and forth Linear movement in the direction of the longitudinal axis 23 of the housing 4 can be initiated.

Die Bewegung des Antriebsteils 13 läßt sich außerhalb des Gehäuses 4 an einem Kraftübertragungsteil 22 abgreifen. Dieses ist beim Ausführungsbeispiel stangenförmig ausgeführt und fest mit den Antriebsteil 13 verbunden, wobei es einen der Abschlußdeckel 8 unter Abdichtung gleitverschieblich durchsetzt. Dieser Abschlußdeckel sei nachfolgend als vorderer Abschlußdeckel 8 bezeichnet.The movement of the drive part 13 can be done outside the housing 4 tap on a power transmission part 22. This is executed in the embodiment of a rod and firmly connected to the drive part 13, wherein it is one of the End cover 8 slidably interspersed with sealing. This end cover is hereinafter referred to as the front end cover Designated 8.

Der Linearantrieb 1 ist beim Ausführungsbeispiel unter Verwendung zweier Halter 24, 25 an der Tragstruktur 2 befestigt. Durch diese Halter 24, 25 wird der Linearantrieb 1 im Abstand zu der Tragstruktur 2 gehalten. The linear drive 1 is used in the exemplary embodiment two holders 24, 25 attached to the support structure 2. The linear drive 1 is spaced by these holders 24, 25 held to the support structure 2.

Die beiden Halter 24, 25 sind den beiden einander entgegengesetzten stirnseitigen Gehäuse-Endabschnitten 26, 27 des Gehäuses 4 zugeordnet. Der eine, nachfolgend als vorderer Halter 24 bezeichnete Halter sitzt dabei am vorderen Abschlußdeckel 8 des Gehäuse-Grundkörpers 5, während der andere, nachfolgend als hinterer Halter 25 bezeichnete Halter am anderen, hinteren Abschlußdeckel 9 befestigt ist.The two holders 24, 25 are opposite to each other front housing end portions 26, 27 of the housing 4 assigned. One, hereinafter as the front holder 24 designated holder sits on the front end cover 8 of the housing base body 5, while the other, hereinafter referred to as rear holder 25 on the other, rear end cover 9 is attached.

Die beiden Halter können wie abgebildet über eine weitestgehend identische Formgebung verfügen. Sie enthalten beim Ausführungsbeispiel jeweils eine Haltewand 32, 33 und einen sich rechtwinkelig zu der Haltewand 32, 33 erstreckenden Befestigungsfuß 34. Über nur strichpunktiert angedeutete Befestigungsmittel 35 ist der Befestigungsfuß 34 derart an der Tragstruktur 2 fixiert, daß die zugeordnete Haltewand 32, 33 vorzugsweise rechtwinkelig von der Tragstruktur 2 wegragt. Dabei verlaufen die beiden zueinander beabstandeten Haltewände 32, 33 zweckmäßigerweise in zueinander parallelen Ebenen.The two holders can be largely as shown have identical shape. They contain in the embodiment one holding wall 32, 33 and one each fastening foot extending at right angles to the holding wall 32, 33 34. Via fasteners indicated only by dash-dotted lines 35 is the mounting foot 34 in such a way Support structure 2 fixes that the associated holding wall 32, 33rd preferably protrudes at right angles from the support structure 2. The two spaced-apart holding walls run here 32, 33 expediently in mutually parallel planes.

Die Haltewand 33 des hinteren Halters 25 ist geschlossen ausgeführt und an die axial orientierte hintere Stirnfläche 36 des Gehäuse-Grundkörpers 5 angesetzt. Dabei liegt zwischen dieser geschlossenen Haltewand 33 und dem hinteren Gehäuse-Endabschnitt 27 eine mechanische Verbindung vor, durch die das Gehäuse 4 an der geschlossenen Haltewand 33 fest fixiert ist. Beim Ausführungsbeispiel wird dies durch eine formschlüssige Verbindung realisiert, indem das Gehäuse 4 rückseitig über mindestens einen Axialvorsprung 37 verfügt, der in eine komplementäre Vertiefung 38 der durchbrechungslosen, geschlossenen Haltewand 33 formschlüssig eintaucht. The retaining wall 33 of the rear holder 25 is closed and the axially oriented rear end face 36 of the housing base body 5. It lies between this closed retaining wall 33 and the rear housing end portion 27 a mechanical connection through which the housing 4 fixed to the closed holding wall 33 is. In the exemplary embodiment, this is achieved by a form-fitting Connection realized by the housing 4 on the back has at least one axial projection 37 which into a complementary recess 38 of the uninterrupted, closed retaining wall 33 immersed positively.

Die Haltewand 32 des vorderen Halters 24 ist gelocht und verfügt über ein durchgehendes Aufnahmeloch 42, mit dem sie auf den vorderen Gehäuse-Endabschnitt 26 aufgesetzt ist. Dabei greift vorliegend der vordere Abschlußdeckel 8 in das Aufnahmeloch 42 ein und kooperiert mit dem Befestigungselement 6, das von der dem Gehäuse-Grundkörper 5 entgegengesetzten Seite her an dem vorderen Abschlußdeckel 8 festgelegt ist.The holding wall 32 of the front holder 24 is perforated and has via a continuous receiving hole 42 with which they open the front housing end portion 26 is attached. there in the present case, the front end cover 8 engages in the receiving hole 42 and cooperates with the fastening element 6, that of the opposite side of the housing base body 5 forth on the front end cover 8 is fixed.

Im einzelnen stützt sich der Gehäuse-Grundkörper 5 mit seiner nach vorne orientierten vorderen Stirnfläche 43 an der Rückseite der gelochten Haltewand 32 ab, während das Befestigungselement 6 mit einer nach rückwärts orientierten Beaufschlagungsfläche 44 auf die Vorderseite der gelochten Haltewand 32 einwirkt. Letztere wird somit zwischen der vorderen Stirnfläche 43 und der Beaufschlagungsfläche 44 fest eingespannt.In particular, the housing base 5 is supported with its forward facing front face 43 on the back the perforated retaining wall 32 off while the fastener 6 with a backward-facing loading surface 44 to the front of the perforated retaining wall 32 acts. The latter is thus between the front End face 43 and the loading surface 44 firmly clamped.

Das Befestigungselement 6 ist beim Ausführungsbeispiel als Schraubmutter ausgeführt, die auf ein Außengewinde des in das Aufnahmeloch 42 hineinragenden Abschnittes des Gehäuse-Grundkörpers 5 lösbar aufgeschraubt ist. Dabei umschließt sie das stangenartige Kraftübertragungsteil 22 in koaxialer Anordnung und trägt eine ringförmige Dichtung 45, die mit der Außenfläche des Kraftübertragungsteils 22 dynamisch dichtend zusammenwirkt, um einen Eintritt von Verunreinigungen in den vom Befestigungselement 6 abgedeckten Bereich zu verhindern.The fastener 6 is in the embodiment as Screw nut running on an external thread of the in the Receiving hole 42 protruding portion of the housing body 5 is detachably screwed on. It encloses the rod-like power transmission part 22 in a coaxial arrangement and carries an annular seal 45 which with the Outer surface of the power transmission part 22 dynamically sealing interacts to prevent contamination from entering the prevent area covered by the fastener 6.

Die Übergangsbereiche 46 zwischen den Haltern 24, 25 und den benachbarten Gehäusezonen sind durch Dichtringe 47 einer Dichtungsanordnung 48 statisch abgedichtet. Auf diese Weise wird verhindert, daß in die an den Übergangsbereichen 46 ansonsten vorhandenen feinen Zwischenräume störende Verunreinigungen eintreten und sich ablagern. Die Dichtringe 47 bestehen aus einem vorzugsweise gummielastischen Dichtmaterial, das zweckmäßigerweise korrosionsbeständig ist und keine toxischen Eigenschaften aufweist. Empfehlenswert sind hier beispielsweise Materialien, die unter den Bezeichnungen "Silikon" oder "Teflon" bekannt sind. Bei einem derartigen Material ist gewährleistet, daß keine chemischen oder biochemischen Reaktionen auftreten, wenn die Dichtringe 47 mit in dem Raum 3 anfallenden flüssigen oder festen Stoffen bzw. Verunreinigungen in Kontakt geraten.The transition areas 46 between the holders 24, 25 and neighboring housing zones are one by sealing rings 47 Sealing arrangement 48 statically sealed. In this way is prevented that otherwise in the transition areas 46 existing fine spaces interfering impurities enter and deposit. The sealing rings 47 exist from a preferably rubber-elastic sealing material, which is expediently corrosion-resistant and none has toxic properties. We recommend here for example materials under the designations "Silicone" or "Teflon" are known. With such a Material is assured that no chemical or biochemical Reactions occur when the sealing rings 47 with in Room 3 liquid or solid substances or Contaminants come into contact.

Bei dem rückwärtigen Halter 25 liegt nur auf einer Seite der geschlossenen Haltewand 33 ein kritischer Übergangsbereich 46 vor. Hier genügt demnach ein einziger Dichtring 47 zur Abdichtung. Dieser umschließt das Gehäuse 4 koaxial und steht sowohl mit der geschlossenen Haltewand 33 als auch mit dem rückseitigen Gehäuse-Endabschnitt 27 in Dichtkontakt.In the rear holder 25 is only on one side closed retaining wall 33 a critical transition region 46 in front. Accordingly, a single sealing ring 47 is sufficient for sealing here. This encloses the housing 4 coaxially and stands both with the closed retaining wall 33 and with the rear housing end portion 27 in sealing contact.

Dem vorderen Halter 24 sind zwei Dichtringe 47 zugeordnet. Auch sie umschließen das Gehäuse 4 mit koaxialer Ausrichtung, wobei einer der Dichtringe 47 hinter der gelochten Haltewand 32 sitzt, während der andere Dichtring 47 der gelochten Haltewand 32 vorgelagert ist. Jeder Dichtring 47 steht zum einen mit der zugeordneten Fläche der gelochten Haltewand 32 und zum anderen mit dem vorderen Gehäuse-Endabschnitt 26 in Dichtkontakt. The front holder 24 is assigned two sealing rings 47. They also enclose the housing 4 with a coaxial orientation, one of the sealing rings 47 behind the perforated retaining wall 32 sits while the other sealing ring 47 of the perforated retaining wall 32 is upstream. Each sealing ring 47 is on the one hand with the assigned area of the perforated retaining wall 32 and on the other hand with the front housing end section 26 in Sealing contact.

Im einzelnen kooperiert der rückseitige der dem vorderen Halter 24 zugeordneten Dichtringe 47 mit dem vorderen Abschlußdeckel 8, während der vordere Dichtring 47 gehäuseseitig mit dem Befestigungselement 6 zusammenarbeitet. Die Kontaktflächen zur gelochten Haltewand 32 sind ringförmig und liegen radial außerhalb des Aufnahmeloches 42.Specifically, the back of the front holder cooperates 24 associated sealing rings 47 with the front end cover 8, while the front sealing ring 47 with the fastener 6 cooperates. The contact areas to the perforated retaining wall 32 are annular and lie radially outside of the receiving hole 42.

Wie aus Figur 2 gut ersichtlich ist, ist die ringförmig umlaufende Außenfläche 52 der Dichtringe 47 so gestaltet, daß der zwischen ihren Randbereichen 53, 53' und dem jeweils benachbarten Flächenabschnitt 54, 54' des Gehäuses 4 bzw. Halters 25 eingeschlossene Übergangswinkel "a" größer als 90° ist. In Figur 2 sind zum besseren Verständnis die an die Randbereiche 53, 53' angelegten Tangenten 55, 55' sowie die an die beiden Flächenabschnitte 54, 54' angelegten Tangenten 56, 56' strichpunktiert angedeutet, die zur Winkelbestimmung herangezogen werden können.As can be clearly seen from FIG. 2, the ring is circumferential Outer surface 52 of the sealing rings 47 designed so that that between their edge regions 53, 53 'and the neighboring one Surface section 54, 54 'of the housing 4 or holder 25 included transition angles "a" greater than 90 ° is. In Figure 2 are the for better understanding Edge areas 53, 53 'tangents 55, 55' and the tangents applied to the two surface sections 54, 54 ' 56, 56 'indicated by dash-dotted lines, for angle determination can be used.

Durch einen derart gestalteten Übergangswinkel "a" wird ein relativ "offener" Übergang zwischen den Flächen der Halter 24, 25 und des Gehäuses 4 gewährleistet, was eine Schmutzablagerung erschwert.With a transition angle "a" designed in this way, a relatively "open" transition between the surfaces of the holders 24, 25 and the housing 4 ensures what a dirt deposit difficult.

Die erwähnte Ausgestaltung des Übergangswinkels "a" gilt zweckmäßigerweise auch für sonstige Dichtringe 57 der Dichtungsanordnung 48, die im äußeren Bereich des Linearantriebes 1 zur Abdichtung der Übergangsbereiche zwischen einzelnen Gehäusebestandteilen eingesetzt werden. Man erkennt in Figur 1 zwei derartige Dichtringe 57, die im Übergangsbereich zwischen dem rohrförmigen Mittelteil 7 und einem jeweiligen Abschlußdeckel 8, 9 plaziert sind. Während allerdings die mit den Haltern 24, 25 zusammenarbeitenden Dichtringe 47 eine konkav geformte Außenfläche 52 besitzen, ist diese Außenfläche 52' bei den weiteren Dicht-ringen 57 konvex ausgeführt. In der Regel wird sich die Gestaltung vor allem daran orientieren, welche Flächenverhältnisse in der Nachbarschaft herrschen, so daß Zonen mit bevorzugter Schmutzablagerung verhindert werden.The aforementioned configuration of the transition angle "a" applies expediently also for other sealing rings 57 of the sealing arrangement 48, in the outer area of the linear drive 1 for sealing the transition areas between individual housing components be used. It can be seen in FIG. 1 two such sealing rings 57, which in the transition area between the tubular middle part 7 and a respective end cover 8, 9 are placed. However, while with the holders 24, 25 cooperating sealing rings 47 a have a concavely shaped outer surface 52, this outer surface 52 'of the other sealing rings 57 are convex. As a rule, the design will primarily be based on what area conditions prevail in the neighborhood, so that zones with preferred dirt deposition are prevented become.

Zweckmäßigerweise sind alle Dichtringe 47, 57 dadurch fixiert, daß sie zumindest partiell in einer koaxial zum Gehäuse 4 angeordneten ringförmigen Vertiefung 58 einsitzen. Dabei ist zweckmäßigerweise vorgesehen, daß die sich axial gegenüberliegenden seitlichen Vertiefungsflanken 62, 62' einer jeweiligen Vertiefung 58 an jeweils einem der beiden gegeneinander abzudichtenden Bauteile vorgesehen sind. So findet sich bei den den Haltern 24, 25 zugeordneten Vertiefungen 58 die jeweils eine Vertiefungsflanke 62 am Gehäuse 4 und die jeweils andere Vertiefungsflanke 62' am zugeordneten Halter 24, 25. In entsprechender Weise sind die Vertiefungsflanken 62, 62' der die weiteren Dichtringe 57 aufnehmenden Vertiefungen 58 jeweils zum einen am Mittelteil 7 und zum anderen am zugeordneten Abschlußdeckel 8, 9 vorgesehen.All sealing rings 47, 57 are expediently fixed in place, that they are at least partially in a coaxial to the housing 4 arranged annular recess 58 sit. there is expediently provided that the axially opposite lateral recess flanks 62, 62 'of a respective one Indentation 58 on one of the two against each other components to be sealed are provided. So it is found in the recesses 58 assigned to the holders 24, 25, the each a recess flank 62 on the housing 4 and each another recess flank 62 'on the associated holder 24, 25. The recess flanks 62, 62 'of the recesses receiving the further sealing rings 57 58 each on the one hand on the middle part 7 and on the other on the associated End cover 8, 9 provided.

Um zu verhindern, daß einer der den Haltern 24, 25 zugeordneten Dichtringe 47 bei der Montage zerquetscht wird, sind am Gehäuse 4 und am betreffenden Halter 24, 25 einander axial gegenüberliegende Anschlagflächen 63, 63' vorgesehen, die zur Vorgabe einer minimalen Breite der zugeordneten ringförmigen Vertiefung 58 aneinander anliegen. Dabei wird man jedoch zweckmäßigerweise vorsehen, daß diese minimale Breite der ringförmigen Vertiefung 58 geringer ist als die Breite des darin gehaltenen Abschnittes des zugeordneten Dichtringes 47, vor dessen Montage betrachtet. Auf diese Weise erfährt der Dichtring 47 bei der Montage eine gewisse axiale Quetschung, was einen zuverlässigen Dichtkontakt zur Folge hat.To prevent one of the holders 24, 25 from being assigned Sealing rings 47 is crushed during assembly, are on Housing 4 and on the relevant holder 24, 25 axially Opposing stop surfaces 63, 63 'are provided which Specification of a minimum width of the assigned ring-shaped Hold recess 58 together. But you will expediently provide that this minimum width of the annular recess 58 is less than the width of the section of the associated sealing ring 47 held therein, considered before assembly. In this way the Sealing ring 47 a certain axial crushing during assembly, which results in a reliable sealing contact.

Die erwähnten Quetschsicherungsmaßnahmen können auch bei allen weiteren Dichtringen 57 vorgesehen sein, sind jedoch nicht notwendigerweise erforderlich, wenn bei der Montage die Gewährleistung der notwendigen Montagesorgfalt sichergestellt ist. So sind beim Ausführungsbeispiel den beiden weiteren Dichtringen 57 keine derartigen Zerquetschsicherheitsmaßnahmen zugeordnet, wenngleich sie durchaus möglich wären. Man hat vielmehr bei diesen weiteren Dichtringen 57 vorgesehen, daß die die Vertiefungsflanken 62, 62' aufweisenden Bauteile bei der Montage soweit einander angenähert werden, daß der betreffende Dichtring 57 eine axiale Quetschung erfährt, woraus eine vorbestimmte Formgebung der Dichtring-Außenfläche 52' resultiert. Durch Vorgabe eines bestimmten Breitenmaßen einer Vertiefung 58 kann somit die Kontur der Außenfläche des betreffenden Dichtringes vorgegeben werden, beispielsweise der Grad der konvexen Auswölbung. Um hier reproduzierbare Verhältnisse zu schaffen, bietet es sich allerdings auch hier an, das gewünschte Breitenmaß der betreffenden Vertiefung durch Anschlagflächen 63, 63' im vorhinein vorzugeben.The anti-crushing measures mentioned can also apply to all additional sealing rings 57 may be provided, however not necessarily required if the Guaranteed the necessary assembly care is. So are the other two in the embodiment Sealing rings 57 no such crushing safety measures assigned, although they would be entirely possible. you has rather provided 57 for these additional sealing rings, that the components flanks 62, 62 ' during assembly so far that the relevant sealing ring 57 experiences an axial crushing, from what a predetermined shape of the sealing ring outer surface 52 'results. By specifying a certain width dimension a recess 58 can thus the contour of the outer surface of the relevant sealing ring can be specified, for example the degree of convex bulge. To be reproducible here However, it is also possible to create relationships here the desired width dimension of the relevant depression to be specified in advance by stop surfaces 63, 63 '.

Es sei noch zu erwähnen, daß die Anzahl und Art der zur Befestigung eines Linearantriebes 1 verwendeten Halter von den jeweiligen Gegebenheiten abhängt. So könnte ein Linearantrieb beispielsweise unter Verwendung lediglich eines Halters befestigt werden, wobei es sich um einen Halter mit gelochter oder mit geschlossener Haltewand handeln kann. Auch können zur Befestigung eines Linearantriebes 1 gleichzeitig mehrere Halter identischer Art verwendet werden, sei es ausschließlich oder zusätzlich zu anderen Haltern.It should also be mentioned that the number and type of attachment a linear actuator 1 used holder of the depends on the respective circumstances. So could a linear actuator for example, using only a holder be a holder with perforated or can act with the retaining wall closed. Can too for fastening a linear drive 1 simultaneously Holders of identical type can be used, be it exclusively or in addition to other holders.

Claims (13)

  1. Linear drive, in particular for applications in the food/and or medical industry,
    with an oblong housing (4) containing a movable drive part (13) and provided on one or both of its housing end sections (26, 27) with a retainer (24, 25) for securing the linear drive (1) to a support structure (2), whereby the retainer (24, 25) is either attached to the end face of the associated housing end section (27) with a closed retaining wall (33) or fitted to the associated housing end section (26) with a perforated retaining wall (32),
    and with a seal arrangement (48) for sealing at least the transitional areas (46) between the housing (4) and the retainer (24, 25) concerned, which features, in a retainer (24) with closed retaining wall (33), a sealing ring (47) enclosing the housing (4) and being in sealing contact with the closed retaining wall (33), and, in a retainer (24) with perforated retaining wall (32), two sealing rings (47) arranged coaxially with the housing (4) on opposite sides of the perforated retaining wall (32) and being in sealing contact with the perforated retaining wall (32), whereby the continuous outer surface (52) of each sealing ring (47) is so designed that the transitional angle enclosed between their two edge sections (53, 53') and the adjacent surface section (54, 54') of the housing (4) and the retainer (24, 25) is greater than 90°, and whereby each sealing ring (47) is made of a corrosion resistant and non-toxic material.
  2. Linear drive according to claim 1, characterised in that the housing (4) is provided with a fastener (6) designed, in particular, as a screw nut for attachment to a retainer (24) with perforated retaining wall (32).
  3. Linear drive according to claim 2, characterised by a sealing ring (47) located between the perforated retaining wall (32) and the fastener (6) of the housing (4).
  4. Linear drive according to any of claims 1 to 3, characterised in that at least one retainer (24, 25) has a mounting foot (34) extending at right angles to the retaining wall (32, 33).
  5. Linear drive according to any of claims 1 to 4, characterised by a concave design of the outer surface (52) of at least one sealing ring (47) of the seal arrangement (48).
  6. Linear drive according to any of claims 1 to 5, characterised by a convex design of the outer surface (52') of at least one sealing ring (57) of the seal arrangement (48).
  7. Linear drive according to any of claims 1 to 6, characterised in that at least one sealing ring (47, 57) of the seal arrangement (48) is at least partially seated in an annular recess (58).
  8. Linear drive according to claim 7, characterised in that the width of the annular recess (58) is less than that of the section of the sealing ring (47, 57) held therein before its installation, so that the installed sealing ring (47, 57) is axially compressed.
  9. Linear drive according to claim 8, characterised in that the width of the annular recess (58) is so chosen that the resulting axial compression results in a predetermined shape of the outer surface (52') of the associated sealing ring (57).
  10. Linear drive according to any of claims 7 to 9, characterised in that the two recess flanks (62, 62') of the annular recess (58) are provided on separate components, whereby a minimum width of the annular recess (58) is predetermined by the corresponding stop faces (63, 63') of the two components.
  11. Linear drive according to any of claims 7 to 10, characterised in that at least one annular recess (58) is provided in a transitional area (46) between the housing (4) and a retainer (24, 25).
  12. Linear drive according to any of claims 7 to 11, characterised in that at least one annular recess (58) is provided between two parts (7, 8, 9) of the housing (4).
  13. Linear drive according to any of claims 1 to 12, characterised by being designed as a fluid-operated linear drive, in particular as a pneumatic of hydraulic cylinder.
EP00112641A 1999-07-01 2000-06-15 Linear drive Expired - Lifetime EP1065388B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29911504U 1999-07-01
DE29911504U DE29911504U1 (en) 1999-07-01 1999-07-01 linear actuator

Publications (2)

Publication Number Publication Date
EP1065388A1 EP1065388A1 (en) 2001-01-03
EP1065388B1 true EP1065388B1 (en) 2004-09-01

Family

ID=8075569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00112641A Expired - Lifetime EP1065388B1 (en) 1999-07-01 2000-06-15 Linear drive

Country Status (3)

Country Link
EP (1) EP1065388B1 (en)
AT (1) ATE275243T1 (en)
DE (2) DE29911504U1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006004655A1 (en) * 2006-01-31 2007-08-09 Kmb Produktions Ag Device for moving a working medium
DE102012210700A1 (en) * 2012-06-25 2014-01-02 Weber Maschinenbau Gmbh Breidenbach Hygiene connecting device
USD704543S1 (en) 2013-01-07 2014-05-13 Weber Maschinenbau Gmbh Breidenbach Nut and seal
WO2024125767A1 (en) * 2022-12-13 2024-06-20 Festo Se & Co. Kg Fluid-operated working cylinder

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE825024C (en) * 1948-07-12 1951-12-17 Well Equipment Mfg Corp Sealing ring or flange packing made of flexible material for a pipe coupling
GB2212869A (en) * 1987-11-24 1989-08-02 Warman Int Ltd Elastomeric pump casing seal
DE4313817A1 (en) * 1991-11-05 1994-11-03 Goeran Anderberg Seal arrangement
US5575487A (en) * 1995-01-17 1996-11-19 Bal Seal Engineering Company, Inc. Circular tapered ring for static sealing under conditions of high pressure

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2912030C2 (en) * 1979-03-27 1983-08-25 Werner 8330 Eggenfelden Pletz End profile for surfaces at an angle to one another
GB2250186A (en) * 1990-11-29 1992-06-03 Rama Krishna Chettur Gap sealing device
DE4311641C1 (en) * 1993-04-08 1994-04-21 Star Gmbh Linear motion guide for machinery - has spring belt cover over whole guide top surface locating in recesses in guide sides
JPH1193371A (en) * 1997-09-24 1999-04-06 Shin Etsu Polymer Co Ltd Silicone rubber filling member and joint filling method
DE29719015U1 (en) * 1997-10-25 1997-12-11 Festo AG & Co, 73734 Esslingen Rotary linear unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE825024C (en) * 1948-07-12 1951-12-17 Well Equipment Mfg Corp Sealing ring or flange packing made of flexible material for a pipe coupling
GB2212869A (en) * 1987-11-24 1989-08-02 Warman Int Ltd Elastomeric pump casing seal
DE4313817A1 (en) * 1991-11-05 1994-11-03 Goeran Anderberg Seal arrangement
US5575487A (en) * 1995-01-17 1996-11-19 Bal Seal Engineering Company, Inc. Circular tapered ring for static sealing under conditions of high pressure

Also Published As

Publication number Publication date
EP1065388A1 (en) 2001-01-03
ATE275243T1 (en) 2004-09-15
DE50007592D1 (en) 2004-10-07
DE29911504U1 (en) 1999-09-16

Similar Documents

Publication Publication Date Title
EP1391640B1 (en) Sealing ring
DE4226821A1 (en) LOCKS
DE29607993U1 (en) Piston for a working cylinder
EP1065388B1 (en) Linear drive
WO1988009890A1 (en) Screw-type valve housing
DE1813237A1 (en) Gate valve for abrasive materials
EP1978263A2 (en) Fluid operated linear motor
EP0886096B1 (en) Connection device and fluid distributor with one or more of said connection devices
EP0135042B1 (en) Gate valve device
EP2873871B1 (en) Fluid-actuated rotary drive
EP2199624B1 (en) Fluid operated linear actuator with guiding unit
EP2495450B1 (en) Fluid-actuated rotary drive
EP3390844B1 (en) Fluid-actuated diaphragm drive, and valve arrangement which is equipped therewith
DE3914891A1 (en) CYLINDRICAL SEALING DEVICE
EP0487905B1 (en) Shut-off valve with U-shaped profiled seal
WO2002012763A1 (en) Valve assembly
EP2495451A1 (en) Fluid-actuated rotary drive
DE68906240T2 (en) DEVICE FOR CUTTING Piles.
DE9417852U1 (en) Piston-cylinder unit
WO2009065420A1 (en) Sealing arrangement and fluid technology assembly equipped therewith
DE8524858U1 (en) Double disk valve
EP1272766B1 (en) Rodless linear drive
DE3734987C1 (en) Cutting rotor with interchangeable knife bars for shredding solid materials
DE202009007020U1 (en) Improved wiper device for use in conjunction with punch tools
EP4098919B1 (en) Valve plate for sealing a valve opening of a vacuum valve

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20001109

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040901

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040901

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20040901

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20040901

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 50007592

Country of ref document: DE

Date of ref document: 20041007

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20041201

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20041201

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20041201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20041212

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050615

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050615

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050615

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

ET Fr: translation filed
26N No opposition filed

Effective date: 20050602

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060228

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20060228

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060630

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20070604

Year of fee payment: 8

BERE Be: lapsed

Owner name: *FESTO A.G. & CO.

Effective date: 20050630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050201

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080607

Year of fee payment: 9

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20080615

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080615

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070615

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100101