EP2255106A2 - Dispositif de réglage pour le positionnement d'une charge - Google Patents

Dispositif de réglage pour le positionnement d'une charge

Info

Publication number
EP2255106A2
EP2255106A2 EP09726280A EP09726280A EP2255106A2 EP 2255106 A2 EP2255106 A2 EP 2255106A2 EP 09726280 A EP09726280 A EP 09726280A EP 09726280 A EP09726280 A EP 09726280A EP 2255106 A2 EP2255106 A2 EP 2255106A2
Authority
EP
European Patent Office
Prior art keywords
carriage
spindle
nut
slide
longitudinal axis
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.)
Withdrawn
Application number
EP09726280A
Other languages
German (de)
English (en)
Inventor
Peter Rangger
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2255106A2 publication Critical patent/EP2255106A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
    • F16H25/2472—Safety nuts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/209—Arrangements for driving the actuator using worm gears

Definitions

  • the present invention relates to an adjusting device for positioning a load, with at least one spindle and with at least one support nut and at least one catch nut, wherein the support nut and the catch nut are arranged on an external thread of the spindle and torque-transmitting connected to each other via a coupling device, wherein the coupling device allows a change in the distance between the support nut and the catch nut along a longitudinal axis of the spindle and a monitoring device for monitoring this distance is provided.
  • the generic adjusting devices are used for positioning of loads. They have at least one spindle on which a support nut sits, which engages in the external thread of the spindle. It is known to rotate the support nut via a drive shaft provided with a worm to thereby raise or lower the spindle secured against rotation. But it is also known in generic adjusting devices to leave the spindle stationary and to drive by means of a gear or motor, in which case the support nut, secured against rotation, is moved along the spindle. As a result of the loads to be positioned, wear and / or wear occurs on the support nut in the course of prolonged operation.
  • the monitoring device be a, in a change in the distance between the catch nut and the support nut in at least one direction parallel to the longitudinal axis of the spindle sliding slide and arranged in an obliquely or orthogonal to the longitudinal axis of the spindle carriage guide path ,
  • Preferably linear, slidable carriage wherein the carriage in the carriage guide track by means of at least one obliquely arranged to the longitudinal direction of the spindle transmission surface is displaceable by the slider.
  • the monitoring device further comprises a carriage, which is mounted in a slide guide track, preferably linearly displaceable. This slide guide track is arranged obliquely or orthogonally to the longitudinal axis of the spindle.
  • oblique encompasses all angles that are not parallel and not orthogonal, ie, at “oblique” angles, these are angles that are not zero degrees, not 90 °, and also not multiples of 90 °.
  • This transfer surface (s) is (are) arranged obliquely to the longitudinal axis of the spindle. It therefore has an angle deviating from zero degrees, 90 ° and an integral multiple of 90 ° with respect to the longitudinal axis of the spindle.
  • the transfer surface (s) are also oriented obliquely to the carriage guide track.
  • the support nut and the lock nut are connected to each other via a coupling device to transmit torque.
  • the Coupling device ensures that upon rotation of the support nut and the catch nut, preferably at the same angle, is rotated. It is basically conceivable that this entrainment of the coupling device takes place only in one direction and even with play.
  • a so-called dog clutch may be provided as such a coupling device.
  • the slide preferably exclusively, by a change in distance between the support nut and the catch nut in at least one direction parallel to the longitudinal axis of the spindle is displaceable.
  • the monitoring device advantageously has a position detection device for detecting at least one position, preferably a plurality of discrete, different positions of the carriage.
  • the displacement of the carriage in the carriage guide track is thus an indicator of how far the slider has been displaced as a result of a change in distance between the support nut and catch nut, and thus an indicator of wear on the support nut.
  • it will be sufficient to detect the achievement of individual discrete wear conditions.
  • it is also provided that only one or more discrete, mutually different positions of the carriage are detected and reported by means of the position detection device. So it may be z.
  • the position detection device is configured to detect 50%, 80%, and 100% wear on the support nut by detecting that the carriage is at the appropriate positions in the carriage track has reached.
  • the position detection device comprises at least one, preferably two or more, switches which are directly or indirectly connected to the carriage in at least one, preferably several, discrete position (s) of the carriage in the carriage guide track are switchable.
  • the monitoring device has a continuously measuring position detection device, if this seems sensible or necessary for the application.
  • the slide is displaced in a first direction parallel to the longitudinal axis of the spindle by means of a first of the transmission surfaces and when the slider is displaced in a second direction opposite to the first direction by means of a second of the transmission surfaces in the first direction Slide guide track is slidable. If it is only a question of monitoring the amount of wear, regardless of whether it results in an increase in distance or a reduction in distance between the support nut and catch nut, then it can be provided that the two transmission surfaces are arranged so that they always the carriage in the same direction move in the carriage guide track.
  • the carriage depending on the direction of the change in distance between the support nut and the arrester, also either in the one or the other direction in the Sled guide track is moved.
  • the transfer surfaces are then to be arranged accordingly.
  • a simple, but safe working embodiment of the invention provides that the transfer surface (s) is formed or fixed on the slide (are), preferably at least partially limited (limit) a recess in the slide.
  • the transfer surface (s) is formed or fixed on the slide (are), preferably at least partially limited (limit) a recess in the slide.
  • a carriage housing having the carriage guide track by means of at least one, preferably linear, fixing guide track directly or indirectly, preferably via a cap on a transmission housing of the actuator is fastened, wherein in a first mounting state, the carriage housing along the fastening guide track is displaceable and in a second fastening state, the position of the carriage housing is fixed.
  • the carriage housing can then be fixed in the second fastening state, whereby the monitoring device is precisely adjusted.
  • the carriage is spring-loaded in the direction of the transfer surface.
  • a corresponding spring or another elastic body may be provided which presses the carriage in the operating position in the direction of the transfer surface.
  • the springs provided in the switches of the position detection device are used for this spring load.
  • the spring load of the carriage may be designed so that the carriage housing is moved by the carriage in the first mounting state of the track alone along the Befest Trents grind- so that the exactly adjusted position of the carriage housing is reached.
  • fastening guide track (s) is (are) aligned parallel to the longitudinal axis of the spindle (are).
  • the fastening guideway (s) may, for. B. be executed as a slot or slots.
  • FIGS. 13 to 15 a second embodiment according to the invention.
  • Figs. 1 and 2 show external views of the first embodiment of the invention
  • Fig. 3 shows a longitudinal section through this adjusting device.
  • the following explanation of the structure and operation of this adjusting device is mainly based on the sectional view acc. 3, wherein in each case the other Reference is made ren figures to this embodiment, as far as it makes sense for the presentation and illustration of certain details.
  • the support nut 2 is rotatably mounted in a transmission housing 1 and arranged on the spindle 3.
  • the internal toothing of the support nut 2 engages in the external toothing 5 of the spindle 4.
  • spindle 4 parallel to its longitudinal axis 12 in both direction 37 'and in the direction 37 slidably.
  • the load to be positioned is not shown in the figures, it is usually attached to the spindle 4 in this embodiment.
  • this For rotating the support nut 2, this has in the illustrated embodiment, an outer toothing 25, in which a worm 8 engages.
  • the drive shaft 9 is mounted, preferably in one piece, on the worm 8 (see, for example, FIGS. 1 and 2), to which a motor or a gear mechanism for rotating the carrying nut 2 can engage. Corresponding transmissions or motors are known per se and are not shown here.
  • the support nut 2 is rotatably supported in the transmission housing 1 via the thrust bearings 6 and 7.
  • the thrust bearings 6 and 7 are in the illustrated embodiment, known per se annular ball bearings. These are arranged and supported together with the support nut 2 between the transmission housing 1 and, screwed into this gear housing cover 10. This has the consequence that the support nut 2 is not displaceable in one of the directions 37 or 37 ' parallel to the longitudinal axis 12 of the spindle 4 relative to the transmission housing 1 and all components of the actuator fixed thereto.
  • an oil chamber 34 is arranged, which can be filled via the cap 36 with oil.
  • the cap 13 is relative to the transmission housing 1 neither in one of the directions 37th or 37 'parallel to the longitudinal axis 12 of the spindle 4 slidably, nor to the longitudinal axis 12 of the spindle 4 rotatable relative to the transmission housing.
  • the support nut 2 and the catch nut 3 are connected to one another not only via the spindle 4 but also via a coupling device designed here as a claw coupling device.
  • This jaw coupling device allows a change in the distance between the support nut 2 and the catch nut 3 along the longitudinal axis 12 of the spindle 4, connects the support nut 2 and the catch nut 3 but transmitting torque.
  • this functionality of the coupling device or of the dog clutch is achieved by arranging on the catch nut 3 the claws 26 which, in the operating position shown in FIG. 5, engage in the intermediate spaces between the claws 26 ', which engage the carrier nut 2 are fixed.
  • the claws 26 ' are formed as a separate annular member which is fixed to the support nut 2.
  • the claws 26 and 26 'of the catch nut 3 are pushed into one another so far that the desired initial distance between the support nut and catch nut is set. Subsequently, both are screwed together on the external thread 5 of the spindle 4, wherein the distance in the screwed state can only change by wear of the teeth of the internal toothing of the support nut 3, as will be explained again below separately.
  • the initial distance in the unconsumed state of the support nut 2 is at an adjusting device, which is loaded both on train and on pressure, so in both directions 37 and 37 ', conveniently adjusted so that the catch nut in the operating position shown in Fig.
  • the monitoring device In order to monitor the change in the distance between the support nut 2 and the catch nut 3, which changes over time due to wear or wear on the support nut 2, the monitoring device according to the invention of this exemplary embodiment has the following:
  • a carriage housing 24 is a z. B. as a bore and closed by means of lid 43 carriage guide track 20, in which the carriage 19 is slidably mounted.
  • the carriage 19 is designed in the embodiment variant shown here as a bolt. But this is only an example, the outer shape of the carriage can be designed in various ways. It is important that the carriage is a component which can be displaced along a guideway. In the embodiment shown, the guideway is in the form of a linear slide guide track 20, but this is not necessarily so.
  • the carriage 19 At its front end, the carriage 19 has a carriage head 21, which in the embodiment shown here is conical or frustoconical in shape.
  • Movement of the slider 15 parallel to the longitudinal axis 12 of the spindle 4 and the resulting movement of the carriage 19 in the carriage guide track 20 can be specified.
  • a slider guide track 16 is provided in the first embodiment on the slide housing 24, which represents a positive guide, which allows movement of the slider 15 in only one of the two directions 37 and 37 '.
  • the slide housing 24 With the slider guide track 16 and thus with the slider 15, the slide housing 24 is arranged in a slot-like recess in the cover cap 13, as shown in FIGS. 5, 7 and the horizontal section shown in FIG. Fig. 7 can be seen.
  • This arrangement of the slider 15 has the consequence that it is not rotatable about the longitudinal axis 12 of the spindle 4, while the catch nut 3 is rotated together with the support nut 2 about the longitudinal axis 12.
  • a transmission device is arranged, which allows rotation of the catch nut 3 about the longitudinal axis 12 of the spindle 4 without rotation of the slider 15 and a displacement of the catch nut 3 in at least one direction 37, 37 'parallel to the longitudinal axis 12 of the spindle 4 only a simultaneous displacement of the slider 15 allows.
  • the transmission device for this purpose, a, fixed to the catch nut 3 switching ring 14, which has an annular, preferably groove-shaped guide 17, in which engages a slider 15 fixed to the slide pin 28.
  • the slide roller 27 which has a ball bearing.
  • the slider roller 27 thus runs in the rotating guide 17 of the switching ring 14 and transmits to the slide pin 28 and thus to the slider 15 only a change in distance between the support nut and catch nut along a direction 37 and 37 'parallel to the longitudinal axis 12 of the spindle 4.
  • the transmission device formed in this way is of course only one example. It would be z. B. also possible to provide on the catch nut 3 a disc which engages in a slot in the slider 15 and is rotatable relative to the slider 15, but a movement of the catch nut 3 in one of the directions 37 and 37 'transmits to the slider 15 ,
  • the carriage 19 is in each case pressed into the carriage housing 24 via the transfer surface 18 or 18' assigned to the respective direction along the carriage guide track 20. This is done against a spring load, which biases the carriage 19 in the direction of slide 15.
  • this spring load is integrated into the switches 30 and 30 ' by their switching pins 31 and 31' are biased by corresponding springs.
  • the spring load of the carriage 19 and a z. B. between the end cover 43 and the carriage 19 acting spring in the carriage guide track 20 may be provided.
  • the said switches 30 and 30 ' are z. B. known as a limit switch and commercially available.
  • a connecting part 29 designed in the form of a pin is provided in the exemplary embodiment shown, which switches the switching pins 31 and 31 when the carriage 19 is displaced in the carriage guide track 20 'The switch 30 and 30' acted upon.
  • the switches are to see this, in particular in Fig. 4, 5, 6 and 8, on Schiit tengephinuse 24 attached.
  • the carriage housing 24 for this purpose lateral recesses.
  • the attachment of the switches 30 and 30 ' by means of screws 33'.
  • the position detection device formed by means of the switches 30 and 30 ' is provided in the embodiment shown here for monitoring the achievement of discrete positions of the carriage 19.
  • switching contacts provided, which are then achieved or switched, if by the displacement of the carriage 19 of the respective switching pin 31 or 31' corresponding far into the housing of the switch 30th or 30 'is pressed.
  • the switching pin 31 in the switch 30 switches a first switching contact when it is pushed by the carriage 19 by an amount in the housing of the switch 30, which corresponds to a 50% wear of the internal toothing of the support nut 2 ,
  • the second switch 30 ' and the switching pin 31' then further switching contacts can be switched, which then z. B.
  • a fixing guide rail is provided along which the carriage housing 24 relative to the cap 13 and can be moved to the transmission housing 1, wherein a first fastening state is provided, in which the carriage housing 24 is displaceable along the fastening guide track and a second fastening state is provided, in which the position of the carriage housing 24 is fixed.
  • the fastening guide track is aligned in the embodiment shown here parallel to the longitudinal axis 12 of the spindle 4 and executed concretely in the form of slots 32 in the carriage housing 24.
  • slots 32 may also be embodied on the cover cap 31 or on another component fixedly connected to the transmission housing 1. It does not necessarily have to be oblong holes. There are also other types of guideways conceivable.
  • Fig. 9 shows a section through this embodiment of an adjusting device analogous to FIG. 3, wherein the external teeth 5 of the spindle 4 engaging internal teeth of the support nut 2, the distance 38 between the catch nut 3 and the support nut 2 and the top left increases the position of the eyes suffered head 21, in which through the transfer surfaces 18 and 18 ' formed recesses of the slider 15 can be seen.
  • Fig. 9 shows the state in which there is still no wear of the internal toothing of the support nut 2 and the carriage is still extended maximum towards the spindle 4, that is in the adjusted starting position.
  • FIG. 10 now shows the state after a wear on the internal toothing of the support nut 2 has already been set by means of prolonged tensile loading in the direction 37 on the spindle 4, from which the distance 40 results.
  • the distance 38 between the support nut 2 and catch nut 3 with respect to the starting situation shown in Fig. 9.
  • the distance 39 between see the upper edge of the catch nut 3 and the support surface 23 'of the cap 13 has shortened.
  • the switch 30 is arranged in the described embodiment so that its switching pin 31 reaches a switching point in this position and outputs a signal with which the monitoring device can indicate that a 50% wear of the internal toothing of the support nut 2 has occurred.
  • FIG. 11 now shows the situation in which a 50% wear has occurred on the spindle 4 as a result of a pressure load in the direction 37 ' . Accordingly, the transitional situation acc. Fig. 9, the distance 38 between the support nut 2 and catch nut 3 shortened. The resulting displacement of the slider 15 ensures that the transfer surface 18 'has pushed the carriage 19 into the carriage guide track 20. This situation also leads to triggering a switching operation on the first switch 30, which in turn indicates a 50% wear.
  • the gear ratio of the travel of the slider 15 to the resulting path of the carriage 19 can be adjusted via the shape and angles of the transfer surfaces 18 and 18 ' . In the embodiment shown, a symmetrical arrangement is selected.
  • Fig. 12 shows still the state in which the internal toothing of the support nut 2 was completely removed by a continuous tensile load in the direction 37 'and it has come to the breakthrough of the spindle. This has led to the catch nut 3 now resting completely against the support surface 23, thus reducing the distance 38 to zero and intercepting the spindle 4 by means of the catch nut 3 on the transmission housing 1 or transmission housing cover 10.
  • On the top left again the position of the slider 15 and the carriage 19 is shown. In this situation, the transfer surfaces 18 and 18 'are completely out of engagement with the contact surfaces 22 and 22 ' .
  • the front side of the carriage 19 slides in this position on a parallel to the longitudinal axis 12 of the spindle 4 aligned surface of the slider 15 along, so that the carriage 19 is no longer pushed into the carriage guide track 20, which in turn prevents the
  • Shift pins 31 and 31 ' are inserted too far into the housing of the switches 30 and 30'. This prevents damage to the switches.
  • Fig. 12 shows a second embodiment in a partially sectioned illustration.
  • the spindle 4 is rotatably mounted in the transmission housing 1, while the support nut 2 is fixed to the transmission housing 1.
  • the drive usually engages the spindle z. B. in area 42. This in turn may be a per se known transmission or directly an engine. Both are not shown here.
  • the support nut 2 is displaced in the respective direction 37 or 37 'along the spindle 4.
  • the screws 33 fasten the load 41, the support nut 2 and the housing 1 to each other.
  • the gear housing cover 10 ' is screwed.
  • the monitoring device according to the invention realized with respect to the distance between support nut 2 and catch nut 3 substantially corresponds to the first exemplary embodiment, so that reference may be made to the statements there.
  • the slide guide track 16 is not mounted here in a cap but directly in a corresponding recess of the gear housing 1.
  • the screws 33 for fixing the carriage housing 24, this time directly to the housing 1 are screwed.
  • the adjustment of the zero position is again via the slots 32 in the first embodiment analogous way. As shown in the exploded view. Fig.
  • a dog clutch between catch nut 3 and support nut 2 is also provided here, which in an analogous manner claws 26 and 26 ' has. Also, the transmission of the change in the distance between the support nut 2 and catch nut 3 on the switching ring 14, the slider 15 and the carriage 19 on the switches 30 and 30 ' works as in the first embodiment.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

L'invention concerne un dispositif de réglage pour le positionnement d'une charge, comprenant au moins une broche (4) et au moins un écrou support (2) et au moins un écrou d'arrêt (3), l'écrou support (2) et l'écrou d'arrêt (3) étant disposés sur un filetage externe (5) de la broche et étant interconnectés via un dispositif d'accouplement par transfert de couple, le dispositif d'accouplement permettant d'avoir une variation de la distance entre l'écrou support (2) et l'écrou d'arrêt (3) le long d'un axe longitudinal (12) de la broche, cependant qu'il est prévu un dispositif de contrôle destiné au contrôle de ladite distance. L'invention est caractérisée en ce que le dispositif de contrôle comprend une coulisse (15) qui, lors d'une variation de la distance entre l'écrou d'arrêt (3) et l'écrou support (2), peut être déplacée dans au moins une direction (37, 37'), parallèlement à l'axe longitudinal (12) de la broche (4), et un chariot (19) pouvant être déplacé, de préférence linéairement, dans une glissière de guidage (20), montée oblique ou orthogonale par rapport à l'axe longitudinal (12) de la broche (4), et en ce que le chariot (19) peut être déplacé de la coulisse (15) dans la glissière de guidage (20), au moyen d'au moins une surface de transmission (18, 18') disposée obliquement par rapport à la direction logitudinale (12) de la broche (4).
EP09726280A 2008-03-27 2009-02-25 Dispositif de réglage pour le positionnement d'une charge Withdrawn EP2255106A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT4802008A AT506595B1 (de) 2008-03-27 2008-03-27 Stelleinrichtung zur positionierung einer last
PCT/AT2009/000075 WO2009117750A2 (fr) 2008-03-27 2009-02-25 Dispositif de réglage pour le positionnement d'une charge

Publications (1)

Publication Number Publication Date
EP2255106A2 true EP2255106A2 (fr) 2010-12-01

Family

ID=41010380

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09726280A Withdrawn EP2255106A2 (fr) 2008-03-27 2009-02-25 Dispositif de réglage pour le positionnement d'une charge

Country Status (3)

Country Link
EP (1) EP2255106A2 (fr)
AT (1) AT506595B1 (fr)
WO (1) WO2009117750A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009022404A1 (de) 2009-05-25 2010-12-02 Liebherr-Aerospace Lindenberg Gmbh Spindeltrieb

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625999C2 (de) * 1996-06-28 2000-09-28 Thyssen Aufzugswerke Gmbh Gewindespindelantrieb für eine Transportvorrichtung
FR2839352B1 (fr) * 2002-05-03 2004-07-16 Ratier Figeac Soc Systeme vis-ecrou a recirculation d'organes roulants, notamment a billes, et a ecrou de securite, notamment pour application aeronautique
AT413877B (de) * 2004-07-23 2006-06-15 Juergen Zimmermann Stelleinrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009117750A3 *

Also Published As

Publication number Publication date
WO2009117750A3 (fr) 2010-01-07
AT506595B1 (de) 2009-10-15
AT506595A4 (de) 2009-10-15
WO2009117750A2 (fr) 2009-10-01

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