EP0744553B1 - Kolbenstangenloser Linearantrieb - Google Patents
Kolbenstangenloser Linearantrieb Download PDFInfo
- Publication number
- EP0744553B1 EP0744553B1 EP96105940A EP96105940A EP0744553B1 EP 0744553 B1 EP0744553 B1 EP 0744553B1 EP 96105940 A EP96105940 A EP 96105940A EP 96105940 A EP96105940 A EP 96105940A EP 0744553 B1 EP0744553 B1 EP 0744553B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- linear drive
- housing
- slot
- connection means
- transmission member
- 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
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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
-
- 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
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches
-
- 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
-
- 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
-
- 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
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
- F15B15/2853—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using potentiometers
Definitions
- the invention relates to a rodless linear drive, with a housing having a longitudinal slot, with a in the housing longitudinally movable drive part, and with one connected to the drive part through the longitudinal slot through outwardly projecting transmission link.
- a linear drive of this type in the form of a so-called Slotted cylinder emerges from DE 41 37 789 C2.
- a load can be transported with the transmission link get connected.
- each one in Longitudinally extending slot-fixed resistance strips is arranged that on the transmission link Sliding contact arrangement is provided, which at the same time is in contact with both resistance strips and during longitudinal movement the transmission link along the resistance strip slides, and that connecting means for connecting the two Resistance strip with a position detection evaluation device available.
- the resistance strips are preferably arranged in longitudinal grooves, which are formed in the slot flanks of the longitudinal slot. This allows the slot width to be maintained and therefore also the width of the relatively heavily loaded in operation Transmission link.
- the sliding contact arrangement expediently comprises two Sliding contacts, each against one of the resistance strips are resiliently biased and mutually in electrical Connect. During the linear movement of the transmission link the sliding contacts slide on the respectively assigned one Resistance strips along, being by the resilient Preload ensures an always safe electrical contact is.
- connection means can be used directly with one or more Cables are connected, which serve as further connection means serve to connect the electrical evaluation device.
- connection means at an axial end region of the housing are arranged, on the one hand with the resistance strips connected and on the other hand as needed enable the detachable electrical connection of the evaluation device.
- connection means are preferably plug-in connection means designed using simple plug connections enable the connection of the evaluation device.
- connection means on the front of the Linear drive arranged. These are located at fluid-operated Linear drives expediently also the connections for the supply and removal of the application medium.
- the configuration according to the invention is not only for fluid-operated ones Linear drives possible.
- at electrically operated linear drives for position detection take place according to the principle of the invention.
- the linear drive according to the example is a fluid operated rodless cylinder. apart of the measures still to be explained for position detection can be the structure of the linear drive described in DE 41 37 789 C2 correspond. On the content of this publication is referred to, so that it is sufficient here, the basic Briefly summarize the structure.
- the linear drive has an elongated housing 1, that consists of a central part formed by a tubular body 2 and two attached to the front ends of the tubular body 2 End caps 3, 4 composed.
- the drive part 7 is a piston, which divides the running chamber 5 axially into two working spaces 8, 8 '.
- Each work space 8, 8 ' is connected to a channel, wherein both channels together on the front side 12 of the open a cover 3.
- the mouths form connection openings 13 for supplying and removing an actuating fluid, via which the drive part 7 for a linear movement in Housing longitudinal direction 6 can be driven.
- the tubular body 2 has at one point on its circumference a longitudinal slot extending over the entire length of the tube 14. This passes through the circumferential boundary of the running chamber 5 Housing wall in the radial direction, being radially inside to the running chamber 5 and radially outside to the surroundings of the housing 1 opens.
- An elongated narrow arranged on the drive part 7 Transmission member 15 passes through the longitudinal slot 14 and protrudes to the outside where there is a schematically indicated driver 16 is in a fixed connection.
- the driver 16 in turn is suitable for connection to an object to be moved, for example a component of a handling device. Corresponding mounting holes are indicated at 17.
- the drive part 7, the transmission member 15 and the driver 16 form a movement unit.
- moving the drive part 7 becomes the driver 16 and thus the object attached to it moved synchronously.
- a flexible radially inside Assigned sealing tape 18 It normally covers the longitudinal slot 14 sealing from the inside. Only in the area of the drive part 7 it is lifted inwards from the longitudinal slot 14, to allow the transmission member 15 to pass through.
- the Sealing tape 18 is here through a recess 22 of the drive part 7 or the transmission member 15 passed.
- the linear drive is generally designated 22 Position detection device equipped. It enables in Operation determining the current position of the mentioned movement unit 7, 15, 16 relative to the housing 1.
- the position detection device 22 initially includes two Resistance strips made of electrically conductive material 23, 23 '.
- One of these resistance strips 23, 23 ' is in each case Area of one of the slot flanks 24, 24 'of the longitudinal slot 14 fixed to the housing.
- a respective resistance strip 23, 23 ' runs in the longitudinal direction of the slot, it being at least essentially extends over the entire slot length.
- every resistance strip is 23, 23 'at least partially and preferably completely received in a longitudinal groove 25 which is in the relevant the slot flank 24, 24 'laterally delimiting the longitudinal slot 14 is trained.
- a respective longitudinal groove 25 also contributes to the exact parallel alignment of the assigned resistance strip 23, 23 'at, it can in the manufacture of the tubular body 2 in the frame an extrusion process can be molded directly.
- the housing 1 regularly consists of metal, for example Aluminum material. Between a respective resistance strip 23, 23 'and the housing material is therefore expediently one Insulation layer made of electrically insulating material 26 arranged. It can be an integral part of the resistance strip 23, 23 '.
- the transmission member 15 is within the longitudinal slot 14 a sliding contact arrangement 32 is provided. It stands at the same time with two resistance strips 23, 23 'in contact. In the Longitudinal movement of the transmission member 15 slides the sliding contact arrangement 32 along the two resistance strips 23, 23 '.
- the sliding contact arrangement 32 thus provides in the area of the transmission link 15 an electrical connection between the two Resistance strips 23, 23 '.
- the longitudinal slot 14 is practically bridged.
- the location of the electrical connection varies depending on the longitudinal position of the transmission member 15, they depends directly on the current relative position between the transmission link 15 and the housing 1.
- the potentiometer principle can be a reliable one stepless detection of the relative position mentioned. This enables extremely precise positioning of the with the Linear drive for moving objects.
- the position detection evaluation device has via a voltage source, not shown, via the one using the electrical connection means 28 Voltage is applied to the two resistance strips 23, 23 ' becomes. This creates a current flow.
- the current flows out from the voltage source via an electrical connection means 28 in one resistance strip 23, from there via the sliding contact arrangement 32 to the other resistance strip 23 'and back via the associated connection means 28 to evaluation device 31.
- Is decisive for the current strength the respectively acting electrical resistance caused by the Resistance strips 23, 23 'is generated. This is determined by the axial length of the current-carrying sections the resistance strip 23, 23 ', which in turn depends on the current Axial position of the sliding contact arrangement 32 depends.
- the current-carrying Strip sections are the longer the further the transmission member 15 and the sliding contact arrangement arranged thereon 32 is removed from the connection means 28. According to the length of the strip sections through which current flows there is a different electrical resistance, what in the position detection evaluation device 31 as Current change is registered. In this way it is currently detected current an indicator of the current Position of movement of the movement units 7, 15, 16 relative to Housing 1. It can then be used depending on certain Positions the control of the linear drive itself or other facilities.
- the sliding contact arrangement 32 preferably has two of them independent sliding contacts 33, 33 ', in the field of opposite longitudinal sides of the web-like transmission member 15 are arranged.
- the design is made so that each sliding contact 33, 33 'on the one hand on the transmission member 15 is fixed and on the other hand spring-loaded against the associated resistance strips 23, 23 'works. To this This results in a in the transverse direction of the longitudinal slot 14 elastic compliance, which ensures that the sliding contacts 33, 33 'always secure contact with the resistance strips 23, 23 'hold.
- the sliding contacts 33, 33 'could for example, be leaf spring-like Contact elements are formed.
- each sliding contact 33, 33 ' is designed as a sliding shoe, wherein both sliding contacts 33, 33 'in the slot transverse direction slidably in a transversely penetrating the transmission member 15 Guide bore 34 are mounted.
- the two sliding contacts 33, 33 ' are mutually electrical connected what in the present case via a flexible electrical conductor 42 takes place, which is fixed to the two sliding contacts 33, 33 ' is. It would also be conceivable to use the spring device 35 as electrical connection conductor.
- the guide bore 34 is expedient for electrical insulation lined with electrically insulating material 49.
- connection means 28 already mentioned are preferred as Plug connection means designed and on the same as shown End face 12 of the end cover 4 arranged like that Connection openings 13 for the pressure medium supply.
- the position detection evaluation device 41 is connected via a cable 43 with complementary examples formed by a plug Counter-connecting means 44 in connection, which in the context of a Plug connection with the plug connection means 28 releasably connectable are.
- a solution that is easier to assemble is provided.
- a connector device 45 that have complementary first and second Connector 46, 47 has.
- the first connectors 46 are in the area of the end face of the tubular body 2 at the ends of the resistance strips 23, 23 'attached.
- the second connector 47 are located opposite each other on the end cover 3 and stand via internal electrical conductors 48 with the connection means 28 in Connection.
- the linear drive is very easy to connect. It is preferably a pneumatically operated linear drive.
- the arrangement according to the invention of a position detection device can also be realized on other linear drives, the transmission member passing through a longitudinal housing slot feature.
- linear drives the transmission member passing through a longitudinal housing slot feature.
- electric linear drives thought, in which the drive part 7 by an electric motor is driven.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Fluid-Damping Devices (AREA)
- Vehicle Body Suspensions (AREA)
- Adjustable Resistors (AREA)
- Transmission Devices (AREA)
Description
- Figur 1
- eine erste Bauform des erfindungsgemäßen Linearantriebes in schematischer perspektivischer Darstellung,
- Figur 2
- eine Draufsicht auf den Linearantrieb aus Figur 1, und
- Figur 3
- den Linearantrieb der Figuren 1 und 2 im Querschnitt gemäß Schnittlinie III-III im Bereich des Längsschlitzes.
Claims (7)
- Kolbenstangenloser Linearantrieb, mit einem einen Längsschlitz (14) aufweisenden Gehäuse (1), mit einem in dem Gehäuse (1) längsbeweglich angeordneten Antriebsteil (7), und mit einem mit dem Antriebsteil (7) verbundenen, durch den Längsschlitz (14) hindurch nach außen ragenden Übertragungsglied (15), dadurch gekennzeichnet, daß im Bereich der beiden Schlitzflanken (24, 24') des Längsschlitzes (14) jeweils ein sich in Schlitzlängsrichtung erstreckender gehäusefester Widerstandsstreifen (23, 23') angeordnet ist, daß an dem Übertragungsglied (15) eine Schleifkontaktanordnung (32) vorgesehen ist, die gleichzeitig mit beiden Widerstandsstreifen (23, 23') in Kontakt steht und bei der Längsbewegung des Übertragungsgliedes (15) auf den Widerstandsstreifen (23, 23') entlang gleitet, und daß Anschlußmittel (28) zur Verbindung der beiden Widerstandsstreifen (23, 23') mit einer Positionserfassungs-Auswerteeinrichtung (31) vorhanden sind.
- Linearantrieb nach Anspruch 1, dadurch gekennzeichnet, daß die Widerstandsstreifen (23, 23') jeweils in einer Längsnut (25) der zugeordneten Schlitzflanke (24, 24') festgelegt sind.
- Linearantrieb nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Schleifkontaktanordnung (32) zwei jeweils federnd gegen einen der Widerstandsstreifen (23, 23') vorgespannte und elektrisch miteinander verbundene Schleifkontake (33, 33') aufweist.
- Linearantrieb nach Anspruch 3, dadurch gekennzeichnet, daß die beiden Schleifkontakte (33, 33') in einer das Übertragungsglied (15) quer durchsetzenden Führungsbohrung (34) verschieblich gelagert und von einer zwischen ihnen angeordneten Federeinrichtung (35) gegen den jeweils zugeordneten Widerstandsstreifen (23, 23') gedrückt werden.
- Linearantrieb nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Anschlußmittel (28) an einem axialen Endbereich des Gehäuses (1) angeordnet sind, wobei sie einerseits mit den Widerstandsstreifen (23, 23') verbunden sind und andererseits den lösbaren elektrischen Anschluß der Positionserfassungs-Auswerteeinrichtung ermöglichen.
- Linearantrieb nach Anspruch 5, dadurch gekennzeichnet, daß die Anschlußmittel (28) als Steckanschlußmittel ausgebildet sind.
- Linearantrieb nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Anschlußmittel (28) an der Stirnseite (12) des Linearantriebes angeordnet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29508517U DE29508517U1 (de) | 1995-05-23 | 1995-05-23 | Kolbenstangenloser Linearantrieb |
DE29508517U | 1995-05-23 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0744553A2 EP0744553A2 (de) | 1996-11-27 |
EP0744553A3 EP0744553A3 (de) | 1999-08-11 |
EP0744553B1 true EP0744553B1 (de) | 2003-03-12 |
Family
ID=8008437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96105940A Expired - Lifetime EP0744553B1 (de) | 1995-05-23 | 1996-04-16 | Kolbenstangenloser Linearantrieb |
Country Status (4)
Country | Link |
---|---|
US (1) | US5662022A (de) |
EP (1) | EP0744553B1 (de) |
KR (1) | KR100193328B1 (de) |
DE (2) | DE29508517U1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19813371C2 (de) * | 1998-03-26 | 2001-12-20 | Festo Ag & Co | Kolbenstangenloser Linearantrieb |
DE20014353U1 (de) | 2000-08-19 | 2000-12-07 | Festo AG & Co, 73734 Esslingen | Linearantrieb |
DE20100672U1 (de) | 2001-01-16 | 2001-03-22 | Festo AG & Co, 73734 Esslingen | Linearantrieb mit Positionserfassungseinrichtung |
DE20106298U1 (de) * | 2001-04-10 | 2001-06-21 | FESTO AG & Co., 73734 Esslingen | Linearantrieb |
DE20300571U1 (de) | 2003-01-15 | 2003-03-13 | FESTO AG & Co., 73734 Esslingen | Linearantrieb mit Positionserfassungsmitteln |
US6917515B2 (en) * | 2003-04-28 | 2005-07-12 | Kita Sensor Tech. Co., Ltd. | Electrical component having a housing retained in a receiving groove in a support through a retaining device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3244616C2 (de) * | 1982-12-02 | 1986-06-19 | Dr. Johannes Heidenhain Gmbh, 8225 Traunreut | Vorrichtung zur Messung von Vorschubbewegungen |
DE3520199A1 (de) * | 1984-10-05 | 1986-04-10 | Wabco Westinghouse Steuerungstechnik GmbH & Co, 3000 Hannover | Potentiometer |
DE9101734U1 (de) * | 1991-02-15 | 1991-05-23 | Hygrama Ag, Rotkreuz | Druckmittelzylinder |
DE4241189A1 (de) * | 1992-12-03 | 1994-06-09 | Mannesmann Ag | Einrichtung zur Positionsermittlung bei einem druckmittelbetriebenen Arbeitszylinder |
-
1995
- 1995-05-23 DE DE29508517U patent/DE29508517U1/de not_active Expired - Lifetime
-
1996
- 1996-04-16 DE DE59610210T patent/DE59610210D1/de not_active Expired - Fee Related
- 1996-04-16 EP EP96105940A patent/EP0744553B1/de not_active Expired - Lifetime
- 1996-04-30 US US08/641,180 patent/US5662022A/en not_active Expired - Fee Related
- 1996-05-16 KR KR1019960016330A patent/KR100193328B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE29508517U1 (de) | 1995-08-10 |
US5662022A (en) | 1997-09-02 |
KR100193328B1 (ko) | 1999-06-15 |
EP0744553A3 (de) | 1999-08-11 |
EP0744553A2 (de) | 1996-11-27 |
DE59610210D1 (de) | 2003-04-17 |
KR960041770A (ko) | 1996-12-19 |
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