WO2009039853A2 - Actionneur linéaire - Google Patents

Actionneur linéaire Download PDF

Info

Publication number
WO2009039853A2
WO2009039853A2 PCT/DK2008/000338 DK2008000338W WO2009039853A2 WO 2009039853 A2 WO2009039853 A2 WO 2009039853A2 DK 2008000338 W DK2008000338 W DK 2008000338W WO 2009039853 A2 WO2009039853 A2 WO 2009039853A2
Authority
WO
WIPO (PCT)
Prior art keywords
capacitive sensors
spindle
spindle nut
printed circuit
circuit board
Prior art date
Application number
PCT/DK2008/000338
Other languages
English (en)
Other versions
WO2009039853A3 (fr
Inventor
Jan FRÖHLICH
Original Assignee
Linak A/S
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 Linak A/S filed Critical Linak A/S
Priority to DE212008000062U priority Critical patent/DE212008000062U1/de
Publication of WO2009039853A2 publication Critical patent/WO2009039853A2/fr
Publication of WO2009039853A3 publication Critical patent/WO2009039853A3/fr

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
    • F16H25/2015—Means specially adapted for stopping actuators in the end position; Position sensing means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • 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
    • F16H2025/2084—Perpendicular arrangement of drive motor to screw axis
    • 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 a linear actuator e.g. for an article of sitting and/or lying furniture of the type as stated in the preamble of claim 1.
  • the invention further relates to a method for determining the position of the spindle nut on the spindle.
  • Determination of the position of the activation element of the actuator is typically performed with a magnetic encoder (cf. e.g. WO 2007/131509 A1 Linak A/S) or a rotary potentiometer (cf. e.g. EP 0 831 250 A2 Dana Corp).
  • a magnetic encoder cf. e.g. WO 2007/131509 A1 Linak A/S
  • a rotary potentiometer cf. e.g. EP 0 831 250 A2 Dana Corp
  • an optical encoder or a linear sliding potentiometer is employed (DE 10 2005 052 796 A1 Okin GmbH).
  • a magnetic and an optical encoder as well as a rotary potentiometer indirectly indicate the position of the activation element calculated based on rotations of the spindle or a gear wheel in the transmission. When using the encoders, information concerning the position of the activation element will be completely lost in case of power failure.
  • a linear sliding potentiometer is attractive, as it at all times directly provides the absolute position of the spindle nut, even when the activation element is manually adjusted for instance by activating a quick release, cf. e.g. WO 03/033946 Linak A/S.
  • a quick release cf. e.g. WO 03/033946 Linak A/S.
  • the sliding potentiometer is difficult to mount as a mechanical connection between the spindle nut and the sliding contact of the potentiometer must be established.
  • the sliding potentiometer is worn as a result of the friction of the sliding contact against the resistor path.
  • the purpose of the invention is to provide another solution for determination of the position of the activation element, which is easier to mount and which is not as exposed to wearing as a traditional sliding potentiometer.
  • the actuator as stated in claim 1.
  • a linear positioning element designed as an elongated capacitive element, comprising a number of capacitive sensors, direct physical contact between the sliding means and the elongated positioning element is avoided, which eases the assembly. In addition, there is no wearing as a result of friction. Further, the positioning element has the advantage that it does not loose information concerning the position in case of power failure.
  • a number of capacitive sensors are located on a strip-shaped printed circuit board, positioned in a guide track in the outer tube of the actuator, parallel to the spindle.
  • the capacitive sensors are activated in that a sliding means in the nature of an activation block made from a conductive material, preferably metal, attached to the spindle nut is moved directly over the capacitive sensors without touching these. This means that the determination of the position of the spindle nut on the spindle during detection can be performed completely without friction and otherwise wearing of the positioning element.
  • the system is tolerant of possible impurities, as an initiation procedure compensates for a possible fault.
  • a printed circuit board is ideal in connection with the integration of the capacitive sensors in an electrically driven linear actuator, but the positioning system can expediently also be designed as a foil with capacitive sensors, which can be placed in the actuator in the same way as a printed circuit board.
  • the positioning system is controlled by an integrated circuit developed for functioning as a controller for a number of capacitive sensors.
  • Such a circuit is typically used for monitoring a keyboard, with a connection to each key or to a row or column in a matrix.
  • a touch panel can be constructed.
  • Such a touch panel can be constructed as a matrix.
  • a solution is achieved, which can be used as an alternative solution where sliding potentiometers otherwise usually are employed as positioning units for actuators.
  • the number of inputs on the touch controller is limited, which will also limit the resolution and thereby accuracy which can be achieved by constructing a slider as a positioning element.
  • it, in an actuator is desired to be able to determine the position of the spindle nut on a spindle, which for instance has a length of 600 mm, having a resolution of 1 mm, it is a challenge both for practical and financial reasons.
  • a touch controller with a large number of input terminals is due to size and energy consumption not immediately realizable.
  • This disadvantage can be overcome by constructing the slider so that all the sensors are connected in a row on the printed circuit board, and then continuing the row by repetition of the same sensors, but in a different order.
  • On the spindle nut is mounted an activation block, which not only has a length greater than the extent of one sensor, but has a length of between two and three times the length of one sensor.
  • the capacitive sensors are typically positioned successive after each other in a saw tooth-like pattern, intending the activation block to more or less cover and thereby activate more capacitive sensors simultaneously.
  • the position of the spindle nut can be calculated based on the signal amplitude of the individual sensor.
  • a microprocessor would typically manage this function and decode the signal from the multiplexed segments. In the upper segment of the slider, where the order of the capacitive sensors has been altered compared with their order in the lower segment, the microprocessor would further attend to calculating the specific position based on the signal level of the activated sensors.
  • the positioning element is also expedient in that it does not loose information concerning the position of the activation block in case of power failure.
  • the positioning element can immediately detect the position of the activation block based on the signal levels of the capacitive sensors without it having to be moved.
  • the output process of the position from the microprocessor can be performed in the same way as when using a sliding potentiometer in that the microprocessor converts the position to a relative voltage. It will also be possible to output the position of the spindle nut on the spindle as a pulse- width modulated voltage, which is the case in other actuator systems, using optical or magnetic positioning systems. Finally, the microprocessor can output the position directly as a counter value or a measure of length by communicating with another microprocessor based unit.
  • end-stop switches are built into electrically driven linear actuators, which cut off the supply to the motor before the spindle nut meets the physical end stops.
  • An example of end stop switches can be seen in EP 1 322 876 Linak A/S.
  • the end stop switches are mounted on a longitudinal strip shaped printed circuit board, which can be extended into the outer tube in a guide track running parallel to the length of the spindle.
  • the end stop switches are activated by the spindle nut, when it moves over the end stop switches and activates the protruding contact means hereon. That the nut can move over the end stop switch without colliding with this enables the printed circuit board with end stop switches to be mounted and demounted without exposing the spindle, which has obvious advantages in terms of production and service.
  • the positioning system with the capacitive sensors can expediently be positioned on the same printed circuit board as the printed circuit board for the end stop switches.
  • the distance between the capacitive sensors and the activation block mounted on the spindle nut has to be small in order to ensure an accurate determination of the position, it means that the spindle nut with the activation block normally cannot move over the end stop switches unless theses are mounted at the opposite side of the printed circuit board but still in such a way that they are mechanically activated when the spindle nut moves over them.
  • a construction of the positioning system with the capacitive sensors on a separate printed circuit board may be preferred.
  • Such a printed circuit board can be inserted into a guide track running parallel to the guide track for the printed circuit board with end stop switches or be secured to it between the end stop switches. If the printed circuit board is inserted in a separate guide track it can be fixed by being adjusted in the length so that it fits between the two end stop switches. In this embodiment, the nut can move freely over the end stop switches and thereby the printed circuit boards can be inserted in their guide track or be removed without it being necessary that the spindle is exposed.
  • Fig. 1 shows a longitudinal section through an electrically driven actuator
  • Fig. 2 shows a section through an actuator exposing the capacitive positioning element
  • Fig. 3 shows a cross section of the outer tube with a guide track for securing a printed circuit board
  • Fig. 4 shows a sketch showing the capacitive sensors constructed on a printed circuit board where the capacitive sensors are activated by means of sliding means and the corresponding signal values
  • Fig. 5 shows an arrangement of printed circuit boards.
  • the main components of the actuator are a two-part housing 1, a reversible motor 2, a worm drive consisting of a worm wheel 3 driven by a worm (not shown) constructed in the drive shaft of the motor, a spindle 4, a spindle nut 5 of plastic, an activation element 6 having a front mounting 7, an outer tube 8 and a rear mounting 9.
  • the activation element 6 consists of a tube and is with its rear end secured to the spindle nut 5.
  • the activation element is secured to the structure in which the actuator should be incorporated by means of an eye 10 in the front mounting 7.
  • the actuator is connected to a second part of the construction by means of an eye 11 constructed in the rear mounting 9.
  • a strip shaped printed circuit board 12 is positioned parallel to the longitudinal direction of the spindle as it appears from fig. 2.
  • the outer tube 8 as shown in a cross section in Fig. 3 there are two guide tracks 13 located opposite each other for inserting the strip shaped printed circuit board 12.
  • a linear positioning element comprising a number of capacitive sensors 14 constructed in the longitudinal direction on the printed circuit board. The capacitive sensors are activated in that an activation block 15 secured to the spindle nut 5 is moved directly over them and thus functioning as sliding means. This means that the determination of the position of the spindle nut on the spindle 4 during detection can be performed without friction and otherwise wearing of the positioning element.
  • the system is tolerant to possible impurities, as an initiation procedure compensates for a possible fault.
  • the activation block which preferably is made of metal, is isolated from the other metal components in the actuator as the spindle nut, to which it is secured, is of plastic.
  • the capacitive sensors 14 are not led all the way to the edge of the printed circuit board. This is deliberate to avoid that the capacitive sensors 14 are affected or short-circuited electrically when the printed circuit board is guided into the guide track 13 in the outer tube 8.
  • the positioning system is operated by an integrated circuit as controller for the capacitive sensors. This circuit can practically be positioned on the back of the printed circuit board 12.
  • the capacitive sensors 14 are positioned in a row so that they form a "slider" and thus function for determination of the position in one longitudinal direction.
  • the activation block 15 mounted on the spindle nut does not only have a length greater that the extent of a single capacitive sensor 14, but a length of between two and three times the length of one sensor.
  • the capacitive sensors 14 are saw-toothed and positioned successive after each other in a close pattern intending the activation block to more or less cover and thus activate more of the sensors at the same time.
  • the controller does not only select the most clearly indicated capacitive sensor, but also expresses the activation degree of the individual sensor, it is possible to calculate the position of the spindle nut based on the signal amplitude of the individual sensor.
  • the activation block 15 always covers at least one of the sensors completely and further at least two other sensors are partially covered. The proportion between the signal amplitude of these partially covered sensors expresses how much the position of the spindle nut is displaced compared with the center of the fully covered sensor. A microprocessor is used for calculating this.
  • the slider is constructed with more segments, so to understand that all the capacitive sensors are connected in a row on the printed circuit board (a segment) for then to continue the row (second segment) by repeating the same capacitive sensors but in a different order.
  • the microprocessor is also used to decode the signals from the multiplexed segments, where the capacitive sensors are rearranged compared with the lower segment. As the rearranging of the capacitive sensors is carried out in a way which prevents that the same combination of capacitive sensors can be covered by the activation block in other segments, an unambiguous indication of the position of the spindle nut on the spindle is achieved.
  • FIG. 5 shows the principle of a multiplexed slider, here shown with two segments S1 and S2 each having five capacitive sensors a - e, where the signal level L for the individual capacitive sensor is indicated above.
  • the activation block 15 covers the sensor c completely and the adjacent sensors b and d partially.
  • the microprocessor selects the sensor c having the highest signal level L1 , as the basis sensor for determining the position. To determine whether the activation with the sliding means is performed in segment S1 or S2, the microprocessor selects the two sensors b, d, having the second L2 and third L3 highest signal level.
  • the microprocessor can determine in which segment the sliding means are located.
  • the segment is calculated to be S1.
  • the microprocessor can likewise calculate the displacement, by means of which the sliding means are located in the longitudinal direction compared with the center of the basis sensor. This is performed by calculating a factor occurring from the proportion between the signal levels of the capacitive sensors adjacent to the basis sensor.
  • the specific location is thereupon calculated by first indicating the physical location of the segment and then the location of the basis sensor on the segment and finally adjusting the factor for displacement compared with the basis sensor calculated from the signal levels of the capacitive sensors adjacent to the basis sensor.
  • the position of the spindle nut will typically be represented by a numerical value.
  • the read-out of the position of the spindle nut on the spindle from the microprocessor can be performed as usual in that the microprocessor converts the position to a relative voltage, as a pulse-width modulated voltage or directly as a numerical value or directly as a linear measure by communicating with another microprocessor-based unit.
  • end stop switches are used, which are activated by the spindle nut 5, when this reaches an end position, and via the control stops the motor.
  • the printed circuit board 12, shown in Fig. 5, shows a printed circuit board on which is mounted two end stop switches 16, 17.
  • the capacitive sensors 14 may be realized on the printed circuit board 12, but since the distance between the activation block 15 embedded in the spindle nut 5 and the capacitive sensors
  • the solution is realizable but requires a particular construction of the spindle nut so that it with the ends can activate the end stop switches 16, 17 and can maintain a short distance between the activation block 15 and the capacitive sensors 14.
  • the solution is unsuitable in that the printed circuit board not only can be inserted into the guide tracks 13 after the spindle 4 and the spindle nut 5 have been mounted in the outer tube 8. Simultaneously, a possibly emerged fault in an end stop switch would mean that the spindle nut and the switch are brought to meet each other in a destructive manner.
  • Another embodiment is based on an alteration of the structure in which the end stop switch is mounted on the other side of the printed circuit board 12 compared to the side where the capacitive sensors 14 are located and the spindle nut 5 moves.
  • There is a hole in the printed circuit board so that the switch on the end stop switch may be activated from the other side of the printed circuit board 12 and still make enough room for the activation part of the switch to be pressed so far into the hole that the spindle nut with activation block can pass over the switch.
  • the printed circuit board 12 is located in the same way as shown earlier in a guide track in the actuator adapted to maintain an accurate distance between the spindle nut/activation block and the capacitive sensors on the printed circuit board.
  • the printed circuit board 12 is fitted with end stop switches 16, 17, and an extra printed circuit board 18 with the capacitive sensors 19 is constructed, which is inserted in an additional guide track in the outer tube 8, running parallel to the other guide track for the printed circuit board 12.
  • the guide track for this additional printed circuit board is located compared to the guide track 13 so that the printed circuit board 12 fixes the printed circuit board 18 in its position in the outer tube 8.
  • the sliding means in the nature of the activation block 15 for activating the capacitive sensors 19 are inserted in the spindle nut 5 in such a way that this is fixed in a position immediately above the capacitive sensors 19 and at the same time is capable of passing over the end stop switches 16, 17. It occurs that the spindle nut 5 can move freely over the end stop switches 16, 17, for which reason both printed circuit boards 12, 18 can be mounted after the mechanical assembly of the actuator, and makes a possible servicing possible without having to disassemble the actuator.
  • the printed circuit board 18 may e.g. be mounted on top of the printed circuit board 12 as a piggyback with distance pieces and electrical connections so that it can be mounted in one operation as an assembled module in the actuator.
  • an inexpensive and assembly friendly positioning element which especially is characterized by not being exposed to wearing, as it is constructed as a capacitive arrangement determined by area, distance and dielectric material, which is here the space between the capacitive sensors and the activation block.

Abstract

Cette invention se rapporte à un actionneur linéaire, destiné à être utilisé par exemple au cours du réglage d'articles de meubles, du type comprenant un logement (1) ayant un moteur électrique réversible (2), qui entraîne une broche (4) par l'intermédiaire d'une transmission (3). Sur la broche, il y a un écrou de broche (5), entouré par un tube extérieur (8). L'écrou (5) ne peut tourner et se déplace ainsi dans la direction longitudinale lorsque la broche (4) est mise en rotation. Dans une piste de guidage (13), est montée une carte de circuit imprimé (12) sur laquelle est construit un système de positionnement capacitif. Les capteurs capacitifs (14) du système de positionnement sont activés par le bloc d'activation (15), monté sur l'écrou de broche (5). Simultanément, l'écrou de broche et le bloc d'activation (15), servent à actionner les contacts d'arrêt d'extrémité (16, 17) montés également sur la carte de circuit imprimé (12), lorsque l'écrou de broche (5) atteint une position d'extrémité lors de sa migration sur la broche (4).
PCT/DK2008/000338 2007-09-27 2008-09-29 Actionneur linéaire WO2009039853A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE212008000062U DE212008000062U1 (de) 2007-09-27 2008-09-29 Linearantrieb

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200701388 2007-09-27
DKPA200701388 2007-09-27

Publications (2)

Publication Number Publication Date
WO2009039853A2 true WO2009039853A2 (fr) 2009-04-02
WO2009039853A3 WO2009039853A3 (fr) 2009-07-16

Family

ID=40202919

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2008/000338 WO2009039853A2 (fr) 2007-09-27 2008-09-29 Actionneur linéaire

Country Status (2)

Country Link
DE (1) DE212008000062U1 (fr)
WO (1) WO2009039853A2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2290260A1 (fr) 2009-08-31 2011-03-02 KIH-utveckling AB Actionneur linéaire comprenant un système de détection de position de butée
WO2013068184A1 (fr) * 2011-11-09 2013-05-16 Dewertokin Gmbh Entraînement linéaire pour meubles
WO2015105448A1 (fr) * 2014-01-07 2015-07-16 Aktiebolaget Skf Mesure de position capacitive d'un actionneur lineaire electromecanique
US11166546B2 (en) * 2019-11-18 2021-11-09 Yi Chen Tseng Height adjustable desk driven by single motor
CN114111546A (zh) * 2020-08-26 2022-03-01 埃韦利克斯公司 位置传感器和制造方法以及用于确定线性致动器的位置的方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE872643C (de) * 1944-10-07 1953-04-02 Pierre Buisson Vorrichtung zum Messen der Abstandsaenderung zweier Elemente durch Messung der AEnderung der Kapazitaet
DE2945895A1 (de) * 1979-11-14 1981-05-27 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Magnetisches laengenmesssystem vorzugsweise zum messen der position von hydraulik-und pneumatikzylindern
DE20009155U1 (de) * 2000-05-20 2000-08-24 Festo Ag & Co Positionserfassungseinrichtung und damit ausgestattete Stellvorrichtung
US20030034774A1 (en) * 2001-08-16 2003-02-20 Delphi Technologies, Inc. Hall effect position sensing in a powered parking brake system
DE10164580C1 (de) * 2001-12-28 2003-04-17 Esw Extel Systems Wedel Ges Fu Anordnung zum Erfassen der aktuellen Länge eines elektromechanischen Linearantriebs
US20060213297A1 (en) * 2005-03-12 2006-09-28 Elero Gmbh Drive system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5809833A (en) 1996-09-24 1998-09-22 Dana Corporation Linear actuator
EP1322876B1 (fr) 2000-10-03 2005-08-10 Linak A/S Actionneur lineaire
DK174879B1 (da) 2001-10-03 2004-01-19 Linak As Aktuator
DE102005052796B4 (de) 2005-11-05 2014-01-09 Ilcon Gmbh Linearantrieb mit Wegmessung
AU2007250344A1 (en) 2006-05-13 2007-11-22 Linak A/S Linear actuator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE872643C (de) * 1944-10-07 1953-04-02 Pierre Buisson Vorrichtung zum Messen der Abstandsaenderung zweier Elemente durch Messung der AEnderung der Kapazitaet
DE2945895A1 (de) * 1979-11-14 1981-05-27 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Magnetisches laengenmesssystem vorzugsweise zum messen der position von hydraulik-und pneumatikzylindern
DE20009155U1 (de) * 2000-05-20 2000-08-24 Festo Ag & Co Positionserfassungseinrichtung und damit ausgestattete Stellvorrichtung
US20030034774A1 (en) * 2001-08-16 2003-02-20 Delphi Technologies, Inc. Hall effect position sensing in a powered parking brake system
DE10164580C1 (de) * 2001-12-28 2003-04-17 Esw Extel Systems Wedel Ges Fu Anordnung zum Erfassen der aktuellen Länge eines elektromechanischen Linearantriebs
US20060213297A1 (en) * 2005-03-12 2006-09-28 Elero Gmbh Drive system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2290260A1 (fr) 2009-08-31 2011-03-02 KIH-utveckling AB Actionneur linéaire comprenant un système de détection de position de butée
US8640562B2 (en) 2009-08-31 2014-02-04 Kih-Utveckling Ab Linear actuator
WO2013068184A1 (fr) * 2011-11-09 2013-05-16 Dewertokin Gmbh Entraînement linéaire pour meubles
US9303739B2 (en) 2011-11-09 2016-04-05 Dewertokin Gmbh Linear drive for furniture
WO2015105448A1 (fr) * 2014-01-07 2015-07-16 Aktiebolaget Skf Mesure de position capacitive d'un actionneur lineaire electromecanique
US11166546B2 (en) * 2019-11-18 2021-11-09 Yi Chen Tseng Height adjustable desk driven by single motor
CN114111546A (zh) * 2020-08-26 2022-03-01 埃韦利克斯公司 位置传感器和制造方法以及用于确定线性致动器的位置的方法

Also Published As

Publication number Publication date
WO2009039853A3 (fr) 2009-07-16
DE212008000062U1 (de) 2010-12-23

Similar Documents

Publication Publication Date Title
WO2009039853A2 (fr) Actionneur linéaire
EP2002148B1 (fr) Actionneur linéaire
EP2232100B1 (fr) Actionneur linéaire
JP5866687B2 (ja) 電気機械変換装置
CN108024898B (zh) 用于可动的手术台组件的位置检测的装置
US8358096B2 (en) Linear actuator
EP2486373B1 (fr) Indicateur de position doté d'une détermination de position à rotation multiple
JP2004138235A (ja) シフトレバー装置
EP3580473B1 (fr) Actionneur linéaire
US6736233B2 (en) Electro-mechanical actuator for an adjustable pedal system
US20090301239A1 (en) Electromotive furniture double drive and switch arrangement
UA119146C2 (uk) Силовий ступеневий перемикач
US11662200B2 (en) Sensor assembly, actuator, control system, electrically adjustable piece of furniture and method for operating an electrically adjustable piece of furniture
EP2309232B1 (fr) Indicateur de position doté d'une détermination de position à rotation multiple
US20050166702A1 (en) Adjustable pedal assembly with step-over control
JPH1038557A (ja) 多回転体の回転角検出装置
JP4784701B1 (ja) スイッチ
CN101116247B (zh) 探测器
EP1329694B1 (fr) Dispositif de commande pour appareils électroniques
JP2004333426A (ja) 位置検出装置
EP0752682A2 (fr) Agencement de levier de commande
CN111627629A (zh) 电子旋转开关以及电连续式加热器
CN117622319A (zh) 传感器装置、车轮致动器、线控转向系统、车辆和方法
DE202006007038U1 (de) Schaltvorrichtung für Messgeräte
JP2007276562A (ja) シフト装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08801373

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase in:

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2120080000628

Country of ref document: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08801373

Country of ref document: EP

Kind code of ref document: A2