EP2372168B1 - Fixation pour capteurs de champ magnétique - Google Patents

Fixation pour capteurs de champ magnétique Download PDF

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Publication number
EP2372168B1
EP2372168B1 EP10157874A EP10157874A EP2372168B1 EP 2372168 B1 EP2372168 B1 EP 2372168B1 EP 10157874 A EP10157874 A EP 10157874A EP 10157874 A EP10157874 A EP 10157874A EP 2372168 B1 EP2372168 B1 EP 2372168B1
Authority
EP
European Patent Office
Prior art keywords
sensor
groove
housing
screw
opening
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.)
Active
Application number
EP10157874A
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German (de)
English (en)
Other versions
EP2372168A1 (fr
Inventor
Torsten Neuhäuser
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.)
Sick AG
Original Assignee
Sick AG
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 Sick AG filed Critical Sick AG
Priority to AT10157874T priority Critical patent/ATE536480T1/de
Priority to EP10157874A priority patent/EP2372168B1/fr
Publication of EP2372168A1 publication Critical patent/EP2372168A1/fr
Application granted granted Critical
Publication of EP2372168B1 publication Critical patent/EP2372168B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F15B15/2892—Means for indicating the position, e.g. end of stroke characterised by the attachment means

Definitions

  • the invention relates to an arrangement for axially adjustable mounting of a sensor, in particular a magnetic field sensor, according to the preamble of claim 1.
  • Magnetic field sensors have for accurate position determination by contactless detection of the position of z.
  • mounting grooves are mounted on the outer surfaces of the housing of the working cylinder, in which the magnetic field sensors are held axially adjustable. In a desired position in the longitudinal direction of the groove, the sensors can be locked by suitable means, such as screws.
  • the upwardly open grooves are always narrower in cross-section in the region of their groove openings than in the direction of the groove base, so that the groove edges form groove shoulders in order to be able to fix the sensors between groove base, groove walls and groove shoulders usually by clamping. Often these are so-called T-slots.
  • the magnetic field sensor described therein has an essentially oval cross-section and can be inserted anywhere in a T-slot.
  • the sensor is inserted in a simple manner on its narrow side in the groove and rotated after insertion in the groove about its longitudinal axis. In this position, it can no longer fall out of the T-slot, but only be moved in the longitudinal direction. In a desired position, the sensor can be locked.
  • the locking of the magnetic field sensor takes place in that by means of a locking screw, the sensor is pressed against the groove bottom, while the screw head is supported against the groove shoulders.
  • a disadvantage of these types of holder (after the EP1 348 935 B1 and the DE 196 53 222 C2 ) is that the magnetic field sensors are mechanically loaded in this type of locking by means of the locking screw, resulting in bending or even damage to the magnetic field sensors, eg. B. tearing out of the locking screw can result.
  • the plastic housing of the sensor is always clamped with the metal groove, so that due to the different materials - metal against plastic - temperature fluctuations, which may be in the machines in which these sensors are used, the biasing force change, in particular reduce can, so that the sensor dissolves unintentionally. If a sensor is released and slipped in the groove, this can have serious consequences, if this false positions of z.
  • Hydraulic cylinder piston can be specified by the sensor.
  • the arrangement according to the invention is based on a groove which, in its cross-section, has groove shoulders narrowing the groove opening on its open side. This is typically a T-slot.
  • a cylindrical sensor within the groove the sensor is inserted via its narrow side through the groove opening in the groove and placeable in the groove after rotation about its longitudinal axis. With a locking screw passing through a housing of the sensor, the sensor can be fixed in a desired position in the longitudinal direction.
  • the invention designed as a plate and the sensor in cross-section almost completely and from the groove bottom embracing locking element is provided which has a locking screw receiving threaded opening, so that Setting the sensor on rotation of the screw on the one hand, the screw is supported on the groove bottom and on the other hand, the locking element is supported on the Nutschultern and the sensor is thus fixed on the locking element and the locking screw in the groove.
  • the particular advantage of the arrangement according to the invention is that the sensor can be fixed with a relatively high tightening torque because the same material types (metal of the locking element and metal of the groove) are used for fastening and thus the sensor can be fixed very securely. Also, the secure fit is maintained because it occurs even in temperature fluctuations no reduction in tension.
  • the locking screw is designed as a grub screw, it may be "sunk" in the housing, so that the housing has no projection, wherein the housing advantageously, as in EP 1 348 935 B1 revealed, in cross-section is substantially oval, so that the sensor can be easily inserted into the groove on its narrow side and rotate there.
  • the threaded opening is formed as a threaded bush, so that the locking screw has good grip in the locking element.
  • the threaded bush proves advantageous for fixed connection with the housing, in particular by injection molding of the housing around the threaded bushing around.
  • the locking element could be connected to the housing in a simple manner by hot-melt adhesive.
  • the locking element is designed to be displaceable on the sensor. Before inserting the sensor into the groove, however, the locking element would have to be connected to the housing, for example by means of a hot-melt adhesive, so that the sensor ultimately can not move relative to the locking element. Such an embodiment would be then advantageous if the positions of the locking element should be variable because z. B. only certain positions are accessible.
  • a cylindrical sensor 12 preferably a magnetic field sensor, is held axially adjustable in a fastening groove 14 by means of a locking element 16 and a locking screw 18.
  • the groove 14 extends in a longitudinal direction and has a groove bottom 20, groove walls 22 and a groove opening 24 extending in the longitudinal direction of the groove 14.
  • the groove opening is narrowed by groove shoulders 26 extending along the groove opening 20 and formed by undercuts of the groove walls 22.
  • the groove 14 is thus formed as a T-slot.
  • the sensor 12 After insertion of the sensor 12 into the groove 14, as described above, the sensor 12 is finally determined by tightening the locking screw 18, while screwing the locking screw 18 into the threaded bush 34 and lifts the locking member 16 from the groove bottom 20 and braces the locking element 16 against the Nutschultern 26, as in the FIGS. 6 and 7a shown.
  • the housing 30 not the housing 30 itself is braced against the groove shoulders 26, but the metal locking element 16.
  • the locking element 16 so the sensor housing 30 must overlap so far that it is guaranteed.
  • the locking member 16 acts as a kind of holder for the sensor 12, wherein the locking member 16 but extremely simple as the housing 30 embracing sheet is formed.
  • the locking element 16 For connecting the locking element 16 to the sensor housing 30, it may be sufficient that the locking element 16, the housing 30 as in Fig. 3 and 5 represented, surrounds and in the housing an extra recess 38 into which the locking element 16 fits positively fits, is provided.
  • the threaded bush 34 of the locking element 16 also engages in the housing 30.
  • the locking element 16 could also be connected to the housing 30 with an adhesive (for example hot-melt adhesive).

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Measuring Magnetic Variables (AREA)
  • Actuator (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Claims (6)

  1. Dispositif pour la fixation d'un capteur cylindrique (12), qui est ajustable axialement, dans une rainure (14) qui comporte, vu dans une section transversale, à son côté ouvert des épaules de rainure (26) qui rétrécissent l'ouverture de rainure (24) et le capteur (12) est insérable dans la rainure (14) à travers l'ouverture de rainure (24) via son côté étroit et peut être placé à l'intérieur de la rainure (14) après rotation de son axe longitudinal, avec une vis de fixation (18) pénétrant une boîte (30) du capteur (12), caractérisé en ce qu'un élément de fixation (16) est prévu, qui est construit d'une tôle et qui, vu dans la section transversale, embrasse presque complètement le capteur (12) du fond de rainure (20) et que l'élément de fixation (16) comporte une ouverture de filetage (32) qui reçoit la vis de fixation (18), en ce que d'une part la vis de fixation (18) est appuyée par le fond de rainure (20) et d'autre part l'élément de fixation (16) est appuyé par les épaules de rainure (26) tout en tournant la vis de fixation (18) pour fixer le capteur (12) et donc le capteur (12) est fixé dans la rainure (14) par l'élément de fixation (16) et par la vis de fixation (18).
  2. Dispositif selon la revendication 1, caractérisé en ce que la vis de fixation est formée comme une vis sans tête.
  3. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le capteur est essentiellement ovale vu dans sa section transversale.
  4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'ouverture de filetage est formée comme une douille de filetage et est fixée fermement à la boîte, en particulier par le moulage de la boîte autour de la douille de filetage.
  5. Dispositif selon l'une des revendications précédentes, caractérisé en ce que l'élément de fixation est relié à la boîte par un adhésif thermofusible.
  6. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que l'élément de fixation est construit de façon que l'élément de fixation peut être décalé sur le capteur.
EP10157874A 2010-03-26 2010-03-26 Fixation pour capteurs de champ magnétique Active EP2372168B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT10157874T ATE536480T1 (de) 2010-03-26 2010-03-26 Halterung für magnetfeldsensoren
EP10157874A EP2372168B1 (fr) 2010-03-26 2010-03-26 Fixation pour capteurs de champ magnétique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10157874A EP2372168B1 (fr) 2010-03-26 2010-03-26 Fixation pour capteurs de champ magnétique

Publications (2)

Publication Number Publication Date
EP2372168A1 EP2372168A1 (fr) 2011-10-05
EP2372168B1 true EP2372168B1 (fr) 2011-12-07

Family

ID=43719532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10157874A Active EP2372168B1 (fr) 2010-03-26 2010-03-26 Fixation pour capteurs de champ magnétique

Country Status (2)

Country Link
EP (1) EP2372168B1 (fr)
AT (1) ATE536480T1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014115224B3 (de) * 2014-10-20 2015-12-31 Sick Ag Vorrichtung und ein Verfahren zur Befestigung eines Sensors
DE102016106583B4 (de) * 2016-04-11 2019-09-26 Sick Ag Sensorgehäuse

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19653222C2 (de) 1996-12-20 1999-04-01 Soyck Gmbh Halterung für Magnetfeldsensoren
JP3780052B2 (ja) 1997-01-16 2006-05-31 Ｓｍｃ株式会社 流体圧機器におけるスイッチ取付機構
DE20204874U1 (de) 2002-03-27 2002-12-12 Sick Ag Halterung für Magnetfeldsensoren
DE102004001788A1 (de) 2004-01-12 2005-08-04 Ifm Electronic Gmbh Anordnung zur axial verstellbaren Halterung eines berührungslos arbeitenden Sensors
DE102004046107A1 (de) * 2004-09-23 2006-04-06 Sick Ag Sensor

Also Published As

Publication number Publication date
ATE536480T1 (de) 2011-12-15
EP2372168A1 (fr) 2011-10-05

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