EP1364129A2 - Kolbenstangenloser linearantrieb - Google Patents
Kolbenstangenloser linearantriebInfo
- Publication number
- EP1364129A2 EP1364129A2 EP02716083A EP02716083A EP1364129A2 EP 1364129 A2 EP1364129 A2 EP 1364129A2 EP 02716083 A EP02716083 A EP 02716083A EP 02716083 A EP02716083 A EP 02716083A EP 1364129 A2 EP1364129 A2 EP 1364129A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cover
- linear drive
- section
- drive according
- longitudinal
- 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.)
- Granted
Links
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
- F15B15/082—Characterised by the construction of the motor unit the motor being of the slotted cylinder type
Definitions
- the invention relates to a rodless linear drive with a housing which has a longitudinal slot penetrated by a movable force transmission member, the outer slot opening of which is associated with a cover device containing at least one cover band, the cover band having a fastening section and fixed on a first long side of the outer slot opening has a pivotable cover section between a cover position covering the outer slot opening and a release position allowing the passage of the force transmission member.
- a rodless linear drive of this type emerges from DE 3509891 AI. It has a housing in which a piston which can be displaced by fluid force is arranged and which is coupled in motion with a force transmission member which extends through a longitudinal slot of the housing. To avoid fluid leakage, the inner slot opening of the longitudinal slot facing the piston receiving space is a sealing band assigned. In the area located on the outer surface of the t ... ..
- the outer slot opening located on the housing is provided with a cover band which extends over the slot length and is fixed to the housing with a longitudinal fastening section on a first long side of the outer slot opening.
- a cover section of the cover band which is pivotally connected to this fastening section covers the outer slot opening axially on both sides of the force transmission member in order to prevent contaminants from entering the longitudinal slot.
- the cover section is pivoted up into a release position in order to allow the force transmission element to pass through. This penetration area is displaced along the longitudinal slot in accordance with the movement and current position of the piston and the force transmission element connected to it.
- latching means for releasably latching fixation in the covering position are provided on the pivotable cover section and in that actuation means coupled to the force transmission element are provided which act on the associated masking tape in order to effect the latching.
- the covering device is thus also designed with at least one covering band that is in the current position of the force transmission member is lifted only on one longitudinal side from the longitudinal slot or the housing defining it.
- This has the advantage that, if desired, complex channel-like bushings for the cover strip can be dispensed with on the force transmission element.
- the snap-in connection ensures that the cover section of the cover tape remains securely in the cover position, material fatigue that may occur having no adverse effects. Reliable locking is ensured with the force transmission element by means of movement-coupled actuation means, which act on the masking tape in question, in particular on the outer surface of the masking section.
- the cover tape is optimally fixed in the cover position if the locking means can work together with counter-locking means which are provided on the housing of the linear drive. Nevertheless, there is definitely the possibility of providing the counter-latching means on an additional sealing tape which is assigned to the inner slot opening, which has the additional advantage that the sealing tape is held securely in the sealing position.
- the latching means are preferably formed by a fork-like profiled latching section of the cover section, which is preferably located on the edge region of the cover section opposite the fastening section and which in particular cooperates with counter-latching devices which are provided by a holding rib extending in the longitudinal direction of the longitudinal slot is formed, which is located on the second longitudinal side of the outer slot opening opposite the first longitudinal side.
- the cover strip is expediently anchored to the fastening section in a fastening groove of the housing which is open towards the longitudinal slot.
- the assembly is carried out in particular by pushing in at the front over one of the two front openings in the fastening groove.
- the embodiment according to the invention is particularly suitable for a covering device with only one masking tape, which covers the entire slot width of the longitudinal slot in the covering position. Nevertheless, it is possible to provide a cover device with two cover bands lying alongside one another along the side, each cover band having a pivotable one Has cover section and both masking tapes contribute together to completely cover the longitudinal slot.
- the actuating means provided for causing the latching connection are expediently located axially on both sides of the force transmission member. Furthermore, it is expedient to design the loading means as a component of a guide device which is coupled to the force transmission member and which controls the pivoting process of the cover section when the longitudinal slot is released and closed.
- the masking tape expediently consists of elastic plastic material, in particular of elastomer material.
- the guide device if any, is also preferably made of plastic material.
- FIG. 1 is a front view of a first design of the rodless linear drive according to the invention with the housing cover removed, so that the piston is visible,
- FIG. 2 shows a longitudinal section of the linear drive from FIG. 1 in a perspective view and without illustration of the housing
- 3 is an exploded view of the components shown in FIG. 2, but without a masking tape
- FIGS. 1 to 3 shows the linear drive from FIGS. 1 to 3 in a cross-sectional view, the sectional plane lying axially outside the piston and only the housing, the cover band and the sealing band being shown,
- FIG. 5 shows a representation corresponding to FIG. 4 with the cover section pivoted into the release position, the section plane running in the region of the force transmission element, not shown,
- Fig. 6 in cross section a partial representation of a further embodiment of the linear drive, the latching connection between the cover band and the sealing band being provided, and
- Fig. 7 shows a further embodiment of the linear drive, in which a covering device having two cover strips is provided.
- the rodless linear drive of the exemplary embodiment is actuated by fluid force and in particular by compressed air.
- the linear drive 1 has a housing 2 with a longitudinal extension, in which a housing 2 extends in the longitudinal direction.
- jerking piston receiving space 3 is preferably formed with a cylindrical cross-sectional contour.
- the housing 2 contains a tubular body 4, in particular in the form of a profiled tube, with an end cover attached on both ends, which are not shown in the drawing.
- the housing 2 has a longitudinal slot 5 which extends axially over almost the entire length of the housing and which is located in particular in the tubular body 4. It passes through the wall of the housing 2 in the radial region of the piston receiving space 3, so that there is an inner slot opening 6 facing the piston receiving space 3 and an outer slot opening 7 located in the area of the outer surface of the housing 2. Both slot openings 6, 7 extend in the longitudinal direction of the longitudinal slot 5.
- a piston 8 is arranged so as to be axially displaceable in the piston receiving space 3. It is equipped at locations axially spaced from one another, preferably at the two axial end regions, with a sealing device 12, which cooperates in a sealing manner with the inner surface of the piston receiving space 3.
- the piston receiving space 3 is subdivided into three axially consecutive subspaces, namely a central subspace lying between the two sealing devices 12 and two external subspaces axially adjoining the piston 8 on both sides, between a respective sealing device 12 and the facing end cover of the housing 2 and have the function of fluidized work spaces.
- the piston 8 can be caused to perform a linear movement in the longitudinal direction of the housing 2 by known, controlled loading of the working spaces by means of an actuating fluid via fluid channels (not shown) running in the housing 2. The direction of movement is illustrated by double arrow 13.
- the linear movement of the piston 8 can be tapped outside the housing 2 at a force tapping part 14 which is fastened to a force transmission member 15 which is coupled to the piston 8 in the direction of movement 13.
- the force-tapping part 14 has fastening means, not shown, for fastening one or more objects to be moved.
- the force tapping part 14 is preferably guided such that it can be displaced in the direction of movement 13 on the outside of the housing 2 by means of a linear guide device 16 and is supported in the transverse direction. In this way, the piston 8 and the force transmission member 15 are prevented from being excessively stressed by forces occurring at the force tapping part 14.
- the force tapping part 14 can be designed like a slide.
- the force transmission element 15 can also be referred to as a driver and extends radially through the longitudinal slot 5 in the manner of a web.
- fastening means 17 formed by screws are used for fastening to the force tapping part 14.
- the force transmission member 15 is provided at the end lying within the piston receiving space 3 with a fork-like holding section 18 with which it can be inserted into the piston 8, of which Long side ago, is plugged in.
- the piston 8 has a recess 22 which receives the holding section 18, the dimensions of which in the direction of movement 13 correspond to those of the holding section 18, so that there is a positive connection in the direction of movement 13. Each axial movement of the piston 8 is thus transmitted to the force transmission element 15 without play.
- a flexible elastic sealing band 24 is assigned to the inner slot opening 6, which has the purpose of sealing the two working spaces lying axially on both sides of the piston 8 from the surroundings and to prevent actuating fluid from escaping through the longitudinal slot 5.
- the sealing tape 24 extends over the entire length of the longitudinal slot 5 and, with its outer sealing tape sections 25 lying axially outside of the piston 8, bears against the slot flanks 26 delimiting the longitudinal slot 5 on both sides.
- the sealing contact usually takes place in the transition area between the piston receiving space 3 and the longitudinal slot 5, the sealing tape 24 being able to dip wholly or partially into the longitudinal slot 5 from the inside as shown.
- the sealing band 24 At the level of the piston 8 and in the middle part space between the two sealing devices 12, the sealing band 24 completely lifted over part of its length from the longitudinal slot 5, that is, from the slot flanks 26.
- the raised sealing tape section 27 runs here through a deflection channel 28 defined in the interior of the piston 8, which rather runs under the force transmission member 15. In this way, the force transmission member 15 can pass through the longitudinal slot 5 unhindered by the sealing tape 24.
- a fluid outlet from the piston receiving space 3 in this area is excluded because the middle part space is separated from the adjoining work spaces in a fluid-tight manner by the sealing contact between the sealing devices 12 and the sealing band 24.
- the outer slot opening 7 of the longitudinal slot 5 is assigned a covering device, generally designated by reference number 32.
- a covering device generally designated by reference number 32.
- it contains a single masking tape 33 which, like the sealing tape 24, consists of plastic material and has rubber-elastic properties. It is preferably a cover band 33 made of elastomer material.
- the cover strip 33 extends over the entire length of the longitudinal slot 5 and has the purpose of preventing contaminants from penetrating into the longitudinal slot 5 from the vicinity of the linear drive 1.
- the cover band 33 closes the outer slot opening 7 axially on both sides of the piston 8, but enables the force transmission member 15 to reach through, unlike in the case of the sealing tape 24, however, the cover tape 33 is not completely lifted in the area of the force transmission member 15 from the longitudinal slot 5 or the housing 2 defining it.
- the cover band 33 always remains firmly connected to the housing 2 on one longitudinal side of the longitudinal slot 5 and is only lifted off on the opposite longitudinal side and is thus deflected around the force transmission member 15. This results in the not insignificant advantage that the force transmission element 15 does not require a complicated through-channel for the cover band 33, but rather can be guided past the outer surface of the force transmission element 15.
- the cover strip 33 is divided in the longitudinal direction into two strip sections adjoining one another on the longitudinal side, namely into a fastening section 34 and a cover section 35. Both sections 34, 35 are connected to one another in one piece, the connecting region being a pivoting region 36 with a lengthening of the cover strip 33 Swivel axis defined.
- the fastening section 34 With the fastening section 34, the cover band 33 is fixed on the housing along a first longitudinal side 37 of the outer slot opening 7.
- the fastening section 34 can be designed in the form of a bead and, compared to the adjoining cover section 35, have a larger cross section, so that it can be anchored in a fastening groove 42 of the housing 2 which is open towards the longitudinal slot 5.
- the fastening section 34 is contoured in a circle and sits in a corresponding manner Contoured section of the fastening groove 42, which merges into the narrower groove opening through which the cover section 35 protrudes.
- the transverse dimensions of the fastening section 34 and the fastening groove 42 are in particular coordinated with one another in such a way that the fastening section 34 can be inserted into the fastening groove 42 from one end face when the cover strip 33 is installed. This can certainly be associated with a slight press-in.
- the cover section 35 can be pivoted between a cover position shown in FIG. 4 and a release position shown in FIG. 5 relative to the fastening section 34 and thus to the housing 2.
- the pivoting movement is indicated by a double arrow at 43.
- the covering section 35 In the covering position, the covering section 35 extends between the first longitudinal side 37 and the second longitudinal side 38 of the outer slot opening 7 opposite it and thus covers the outer slot opening 7 over its entire width.
- the cover section 35 can be partially or completely immersed in the longitudinal slot 5 from the outside.
- the cover section 35 is pivoted away from the housing 2 and thus exposes the outer slot opening 7 for the force transmission member 15 to pass through.
- the transition between the cover position and the release position is controlled by a guide device 44 which is axially motion-coupled to the force transmission element 15. Its structure is such that it imposes the release position on the cover section 35 at the axial height of the force transmission member 15 and in transition regions 45 adjoining it axially on both sides, and in each case subsequently creates the cover position.
- the release position is characterized by a differently large pivoting angle of the cover section 35, which has its maximum at the level of the force transmission member 15 and gradually decreases in the course of the transition regions 45 up to the end of the guide device 44 and the cover position that is then present.
- cover band 33 has latching means 46, with the aid of which it is releasably latched in the cover position.
- the latching causes a reliable contact between the longitudinal edge region 41 of the cover section 35 opposite the fastening section 34 and the housing 2 on the associated second longitudinal side 38.
- a pre-tensioning between the components mentioned can be achieved during the latching, which leads to a sealing contact, which The entry of solid and liquid contaminants is prevented very reliably.
- the cover band 33 with its cover section 35 passes through the above-mentioned guide device 44, the guide device 44 causing both the unlocking and the locking of the cover section 35.
- the latching means 46 of the cover section 35 cooperate with counter-latching means 47, which are provided directly on the housing 2 of the linear drive 1.
- the counter-latching means 47 are preferably formed here by a holding rib 48 which extends in the longitudinal direction of the longitudinal slot 5 and is located on the second longitudinal side 38 of the longitudinal slot 5 and projects in the direction of the opposite slot edge.
- the latching means 46 consist of a fork-like profiled latching section 49 of the cover section 35, in the groove-like opening of which the retaining rib 48 is immersed in the latched state.
- the holding rib 48 is clamped between the two fork arms 53a, 53b of the latching section 49.
- the inner fork arm 53b is deformable and is bent over when it is snapped in and out. One could also speak of a snap connection here.
- the retaining rib 48 is provided with a cross section tapering towards the free end, and the space of the locking section 49 defined between the fork arms 53a, 53b also tapers in the depth direction. This particularly supports the locking process.
- the guide device 44 has actuation means 54 axially on both sides of the force transmission member 15, which are connected to the outer surface 55 of the locking device, which faces away from the longitudinal slot 5.
- cover section 35 can work together to lock the cover section 35 fixed to the housing during the transition between the release position and the cover position.
- the loading means 54 press on the outer surface 55, so that the cover section 35 is pivoted inwards and is forced into locking engagement with the counter-locking means 47.
- the application means 54 mark the two outer ends of the transition regions 45 and are formed by application surfaces, the course of which corresponds to the desired course of the cover section 35. They are curved, their distance from the outer slot opening 7 decreasing with increasing distance from the force transmission member 15. As a result, the cover section 35 is gradually pressed downward against the longitudinal slot 5 as it passes under the corresponding loading surface and with a corresponding direction of movement of the piston 8.
- the guide device 44 is equipped with an oppositely oriented guide surface 56. Starting from the end regions opposite the loading means 54, it becomes increasingly steeper in the direction of the force transmission member 15. Since the cover section 35 slides along with its inner surface 57 on the guide surface 56, the course of the guide surface 56 thus determines the pivoting process of the cover section 35 during the transition between the cover position and the release position. The guide surface 56 is therefore steepest in the area of the force transmission member 15, the last res can form a direct part of the guide surface 56.
- the guide surface 56 Apart from the component that may be provided on the force transmission member 15, the guide surface 56, like the actuating means 54 and thus the entire guide device 44, is provided on a single component, which in the exemplary embodiment forms an insert 58 which is inserted into the piston 8 on the longitudinal side.
- the insert 58 expediently consists of plastic material, the application surfaces of the application means 54 and the guide surface 56 being produced in particular by free molding.
- the implementation of the guide device 44 on an independent component has the advantage that the complicated surface courses can be produced independently of the manufacture of the piston 8.
- the insert 58 is expediently installed in the piston 8 by plug-in assembly, the piston 8 having a recess 59 which is open towards one longitudinal side and into which the insert 58 is inserted with a foot section 62 at right angles to the direction of movement 13.
- Interlocking centering means 63 for example ribs and grooves, ensure exact positioning.
- the above-mentioned deflection channel is preferably located in the recess 59 and is defined partly by the piston 8 and partly by the foot section 62 of the insert 58.
- the latter can have a deflection surface 64 facing the sealing tape 24.
- the force transmission member 15 could in principle be an integral part of the insert 58. For the reasons already explained above, however, an independent implementation is more advantageous. So is in the embodiment
- Insert 58 at the level of the recess 22 of the piston 8 is provided with a further recess 65, which enables the fork-like holding section 18 to be inserted and the insert 58 is ultimately gripped by the holding section 18 in a manner similar to a rider.
- the loading means 54 When passing through the guide device 44, the loading means 54 act like hold-down devices which press the cover section 35 into the locked state.
- the intermediate guide surface 56 which can be composed of a plurality of successive surface sections, is responsible for erecting the cover section 35 into the release position for the purpose of deflecting around the force transmission member 15.
- FIG. 6 shows a further embodiment of the linear drive, in which the cover section 35 is in turn locked on the second longitudinal side 38 of the outer slot opening 7 with the housing 2 in the locked state.
- the counter-latching means 47 are not provided directly on the housing 2 here, but are located on the surface of the sealing tape 24 facing the cover tape 33, which is supported on the housing 2 in the sealing position. This design has the advantage that the cover tape 33 and the sealing tape 24 oppose each other. hold each other in the cover position or sealing position.
- the design shown in FIG. 7 differs from the one described above primarily in that the cover device 32 has two cover bands 33a, 33b instead of just one cover band.
- Each of these masking tapes 33a, 33b has a fastening section 34 and a masking section 35, with their fastening sections 34 being fixed to the housing on opposite longitudinal sides of the longitudinal slot 5.
- their cover sections 35 project toward one another, each covering a partial width of the outer slot opening 7.
- the arrangement is selected such that the longitudinal slot 5 is covered by half of its width in each case by the two covering sections 35 in the covering position.
- each cover section 35 will be assigned its own guide surface, so that the cover sections 35 are directed past on opposite sides of the force-tapping part 14.
- Suitable latching means 46 can be formed on the mutually facing longitudinal edge regions 41 of the cover sections 35, which cooperate with commonly assigned counter-latching means 47 of the sealing tape 24.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Fluid-Damping Devices (AREA)
- Valve Device For Special Equipments (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Basic Packing Technique (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10109482 | 2001-02-28 | ||
DE10109482A DE10109482A1 (de) | 2001-02-28 | 2001-02-28 | Kolbenstangenloser Linearantrieb |
PCT/EP2002/000740 WO2002075163A2 (de) | 2001-02-28 | 2002-01-25 | Kolbenstangenloser linearantrieb |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1364129A2 true EP1364129A2 (de) | 2003-11-26 |
EP1364129B1 EP1364129B1 (de) | 2007-02-14 |
Family
ID=7675705
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02716083A Expired - Lifetime EP1364129B1 (de) | 2001-02-28 | 2002-01-25 | Kolbenstangenloser linearantrieb |
Country Status (6)
Country | Link |
---|---|
US (1) | US6910408B2 (de) |
EP (1) | EP1364129B1 (de) |
JP (1) | JP3856761B2 (de) |
AT (1) | ATE354032T1 (de) |
DE (2) | DE10109482A1 (de) |
WO (1) | WO2002075163A2 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2897327B1 (fr) * | 2006-02-16 | 2008-05-23 | Sncf | Systeme d'entrainement d'un element en coulissement sur un guide et plate-forme de transfert d'embrayage d'un element a entrainer en coulissement sur un guide |
FR2897328B1 (fr) * | 2006-02-16 | 2012-05-11 | Soc Nat Des Chemins De Fer Francais | Systeme de couverture deployable et reployable par coulissement sur un guide par verin |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE8107724L (sv) * | 1981-12-22 | 1983-06-23 | Mecman Ab | Anordning vid en kolvstangslos tryckmediecylinder |
DE3509891A1 (de) * | 1985-03-19 | 1986-09-25 | Herion-Werke Kg, 7012 Fellbach | Kolbenstangenloser zylinder |
US4852465A (en) | 1985-12-18 | 1989-08-01 | Tol-O-Matic, Inc. | Carrier bracket for power cylinder |
US4829881A (en) * | 1987-03-12 | 1989-05-16 | Ckd Corporation | Rod-less cylinder |
DE9410393U1 (de) * | 1994-06-28 | 1994-08-18 | Festo Kg, 73734 Esslingen | Linearantrieb |
DE19605387C2 (de) * | 1996-02-14 | 1998-01-15 | Neff Antriebstech Automation | Führungseinrichtung mit Abdeckband |
AT2690U1 (de) | 1998-07-01 | 1999-02-25 | Hygrama Ag | Kolbenstangenloser druckmittelzylinder |
ATE241108T1 (de) * | 1998-12-18 | 2003-06-15 | Accor Technology Inc | Rohrverbindung |
-
2001
- 2001-02-28 DE DE10109482A patent/DE10109482A1/de not_active Withdrawn
-
2002
- 2002-01-25 AT AT02716083T patent/ATE354032T1/de not_active IP Right Cessation
- 2002-01-25 DE DE50209479T patent/DE50209479D1/de not_active Expired - Lifetime
- 2002-01-25 EP EP02716083A patent/EP1364129B1/de not_active Expired - Lifetime
- 2002-01-25 US US10/467,029 patent/US6910408B2/en not_active Expired - Lifetime
- 2002-01-25 WO PCT/EP2002/000740 patent/WO2002075163A2/de active IP Right Grant
- 2002-01-25 JP JP2002573539A patent/JP3856761B2/ja not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO02075163A2 * |
Also Published As
Publication number | Publication date |
---|---|
US6910408B2 (en) | 2005-06-28 |
DE10109482A1 (de) | 2002-09-12 |
JP2004526105A (ja) | 2004-08-26 |
WO2002075163A3 (de) | 2002-12-12 |
WO2002075163A2 (de) | 2002-09-26 |
EP1364129B1 (de) | 2007-02-14 |
DE50209479D1 (de) | 2007-03-29 |
ATE354032T1 (de) | 2007-03-15 |
JP3856761B2 (ja) | 2006-12-13 |
US20040060434A1 (en) | 2004-04-01 |
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