EP1348935B1 - Halterung für Magnetfeldsensoren - Google Patents
Halterung für Magnetfeldsensoren Download PDFInfo
- Publication number
- EP1348935B1 EP1348935B1 EP03004762A EP03004762A EP1348935B1 EP 1348935 B1 EP1348935 B1 EP 1348935B1 EP 03004762 A EP03004762 A EP 03004762A EP 03004762 A EP03004762 A EP 03004762A EP 1348935 B1 EP1348935 B1 EP 1348935B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnetic field
- field sensor
- groove
- sensor
- head screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims 1
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2892—Means for indicating the position, e.g. end of stroke characterised by the attachment means
Definitions
- the invention relates to a magnetic field sensor which is arranged axially adjustable on the housing of a working cylinder.
- Such magnetic field sensors have for precise position determination by contactless detection of the position of z.
- B. Pneumatic or hydraulic pistons proven within a working cylinder.
- guide grooves are provided on the outer surfaces of the housing of the working cylinder, in which the magnetic field sensors are axially adjusted and then locked.
- the guide grooves which have both a cylindrical and a rectangular cross section, are opened to the outside via a gap opening.
- the magnetic field sensor described therein essentially has a circular cross section and is held in a cylinder groove which is slotted outwards.
- These magnetic field sensors have such a cross section, that they are inserted into a guide groove via their narrow side and after inserted and locked in the guide groove.
- the lock of the magnetic field sensor takes place in that by means of a locking screw, which is supported on the groove bottom, the sensor is pressed against the groove shoulder.
- a disadvantage of this known prior art is that inevitably existing mechanical tolerances of the guide groove as well Tolerances in the cross section of the magnetic field sensor, the air gap of the sensor is changed to the working cylinder in the housing. This change in distance leads inevitably to a magnetic field change, which changes in terms of functional accuracy of the sensor has a negative effect.
- Another disadvantage is that the magnetic field sensors, with this type of locking by means of the locking screw be mechanically loaded, causing bending or even damage the magnetic field sensors can lead.
- the invention has for its object to design a magnetic field sensor so that it is in as many slots as possible, which vary depending on the manufacturer are designed, can be used at any point and can then be locked.
- the air gap of the sensor should change not change to the working cylinder and beyond that the mechanical Stress on the magnetic field sensor can be minimized.
- the axial Adjustment of the magnetic field sensor in the guide groove is smooth, precise and be reproducible.
- the object is achieved in that the magnetic field sensor has the shape of an ellipse-like cylinder and thus in one certain position used in the guide groove and then rotated axially can be.
- the locking of the magnetic field sensor is screwed into it Raised head screw carried out.
- the fillister head screw slightly unscrewed from the magnetic field sensor until it is on the groove shoulders, which are attached next to the stomata, supports and the sensor presses against the groove bottom. This is the distance between the magnetic field sensor and Pistons in the working cylinder kept constant.
- the outside diameter and flattening radius adapted to the gap opening of the guide groove there is also the advantage that the magnetic field sensor when tightening the screw is locked in the center of the gap opening.
- the pan head screw is used Locking the magnetic field sensor in the internal thread of one in the magnetic field sensor inserted socket, which from the pointing towards the groove bottom Sensor surface protrudes slightly from the magnetic field sensor.
- the screw for locking the magnetic field sensor near that end face of the sensor into which the connection cable is inserted This will make the if necessary, act on the magnetic field sensor via the connection cable Intercepted forces and can not have a negative impact on the electronics.
- the sensor element can be attached very close to the sensor tip, which makes the Magnetic field sensor is able to determine the end positions of the piston position in the limit case to be able to detect beyond the guide groove.
- Figure 1 shows a magnetic field sensor 1 with an electrical connection cable 2.
- a lens head screw 3 is countersunk in the magnetic field sensor 1, which in the screwed-in state shown here does not match the elliptical one Cylinder cross section protrudes.
- a Window 4 is attached, in which a function display is attached.
- the major axis 9 of the ellipse-like cross section lies parallel to the gap opening 7, as a result of which the magnetic field sensor can no longer be removed from the guide groove in this position.
- the oval head screw 3 is rotated such that it moves in the direction of the gap opening 7.
- a section of a housing 10 of a working cylinder is shown on the side view according to FIG. 3 cut in the longitudinal axis of the pan head screw.
- a rectangular guide groove 8 is embedded, which is opened to the outside through the gap opening 7.
- two groove shoulders 11 and 12 are attached on the inside of the guide groove.
- a socket 13 with an internal thread is embedded in the magnetic field sensor 1, into which the pan head screw 3 is screwed. Since the maximum diameter on the underside of the screw head is larger than the gap opening 7 of the guide groove, when the lens head screw 3 is unscrewed from the socket 13, it is supported with the falling flanks 15, 16 on the groove shoulders 11, 12 and presses the magnetic field sensor 1 with it its socket, which protrudes slightly from the magnetic field sensor 1, against a groove bottom 14. The falling flanks of the special pan head screw 3 simultaneously center the magnetic field sensor 1 in the axis of symmetry 17 of the guide groove.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Measuring Magnetic Variables (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Description
Die Führungsnuten, die sowohl einen zylindrischen als auch rechteckigen Querschnitt aufweisen, sind über eine Spaltöffnung nach Außen geöffnet.
Eine derartige Halterung von Magnetfeldsensoren an einem Arbeitszylinder ist aus der DE 44 35 671 A1 bekannt. Der darin beschriebene Magnetfeldsensor hat im Wesentlichen einen kreisförmigen Querschnitt und wird in einer nach Außen geschlitzt ausgeführten Zylindernut gehalten.
- Figur 1
- eine perspektivische Darstellung eines erfindungsgemäßen Magnetfeldsensors
- Figur 2a,b
- eine schematische Darstellung der Einfügung und Arretierung des Magnetfeldsensors in einer Führungsnut
- Figur 3
- eine in der Längsachse der Linsenkopfschraube geschnittene Seitenansicht des erfindungsgemäßen Magnetfeldsensors in einer Führungsnut.
Auf der in Längsachse der Linsenkopfschraube geschnittenen Seitenansicht nach Figur 3, ist ein Ausschnitt eines Gehäuses 10 eines Arbeitszylinders dargestellt. In diesem Gehäuse ist eine rechteckige Führungsnut 8 eingelassen, welche durch die Spaltöffnung 7 nach Außen geöffnet ist. Seitlich der Spaltöffnung 7 sind an der Innenseite der Führungsnut zwei Nutschultem 11 und 12 angebracht. Im Magnetfeldsensor 1 ist eine Buchse 13 mit Innengewinde eingelassen, in welche die Linsenkopfschraube 3 eingeschraubt ist. Da der maximale Durchmesser an der Unterseite des Schraubenkopfes größer als die Spaltöffnung 7 der Führungsnut ist, stützt sich beim Herausdrehen der Linsenkopfschraube 3 aus der Buchse 13 diese mit den abfallenden Flanken 15, 16 an den Nutschultern 11, 12 ab und drückt den Magnetfeldsensor 1 mit dessen Buchse, die geringfügig aus dem Magnetfeldsensor 1 herausragt, gegen einen Nutboden 14. Die abfallenden Flanken der speziellen Linsenkopfschraube 3 zentrieren dabei gleichzeitig den Magnetfeldsensor 1 in der Symmetrieachse 17 der Führungsnut.
Claims (8)
- Anordnung zur axial verstellbaren Halterung eines Magnetfeldsensors innerhalb einer am Außenbereich eines Arbeitszylinders vorgesehenen Führungsnut, in die durch eine Spaltöffnung ein zylindrischer Sensor einsetzbar und nach Drehung um seine Längsachse in der Führungsnut platzierbar ist, dadurch gekennzeichnet, dass eine in das Gehäuse des Magnetfeldsensors eingreifende Kopfschraube sich bei Drehung an den seitlich neben der Spaltöffnung angebrachten Nutschultern abstützt und dadurch den Magnetfeldsensor gegen den Nutboden verspannt.
- Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Kopfschraube in eine in den Magnetfeldsensor eingesetzte Buchse, vorzugsweise eine Metallbuchse, mit Innengewinde eingreift und damit den Magnetfeldsensor über die Buchse gegen den Nutboden verspannt.
- Anordnung nach Anspruch 2, dadurch gekennzeichnet, dass die eingesetzte Buchse auf der dem Nutboden zugewandten Seite geringfügig über den Magnetfeldsensor hinausragt, so dass beim Verdrehen der Kopfschraube nur diese Buchse mit dem Nutboden verspannt wird.
- Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schraubenkopf eine linsenkopfähnliche Schraube ist die mit einem kegelförmig verlaufenden Bereich ausgebildet ist, welcher beim Anpressen der Kopfschraube an die Nutschultern den Magnetfeldsensor in der Spaltöffnung zentriert.
- Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kopfschraube und das im Magnetfeldsensor angebrachte Innengewinde zur Aufnahme der Kopfschraube mit einem Linksgewinde versehen sind.
- Anordnung nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die eingesetzte Metallbuchse in einen Magnetfeldsensor mit Kunststoffgehäuse eingebaut ist.
- Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Kopfschraube nahe an der Stirnseite des Magnetfeldsensors angebracht ist, an welcher das Anschlusskabel in den Sensor eingeführt ist.
- Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das für die Detektierung der Kolbenstellung verantwortliche Sensorelement in der Nähe der dem Anschlusskabel gegenüberliegenden Stirnfläche des Sensors angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20204874U | 2002-03-27 | ||
DE20204874U DE20204874U1 (de) | 2002-03-27 | 2002-03-27 | Halterung für Magnetfeldsensoren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1348935A1 EP1348935A1 (de) | 2003-10-01 |
EP1348935B1 true EP1348935B1 (de) | 2004-08-18 |
Family
ID=7969441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03004762A Expired - Lifetime EP1348935B1 (de) | 2002-03-27 | 2003-03-05 | Halterung für Magnetfeldsensoren |
Country Status (4)
Country | Link |
---|---|
US (1) | US6868771B2 (de) |
EP (1) | EP1348935B1 (de) |
AT (1) | ATE274181T1 (de) |
DE (2) | DE20204874U1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2372168A1 (de) | 2010-03-26 | 2011-10-05 | Sick AG | Halterung für Magnetfeldsensoren |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004046107A1 (de) | 2004-09-23 | 2006-04-06 | Sick Ag | Sensor |
US7415891B2 (en) * | 2005-09-30 | 2008-08-26 | Rockwell Automation Technologies, Inc. | Sensor mounting structure with snapping feature |
US7546780B2 (en) * | 2005-09-30 | 2009-06-16 | Rockwell Automation Technologies, Inc. | Sensor mounting structure allowing for adjustment of sensor position |
US7412900B2 (en) | 2005-09-30 | 2008-08-19 | Rockwell Automation Technologies, Inc. | Sensor mounting structure with adjustable swivel ball and panel mounting mechanism |
US7527437B2 (en) * | 2005-09-30 | 2009-05-05 | Rockwell Automation Technologies, Inc. | Sensor mounting structure with light pipe |
DE102008062337A1 (de) * | 2008-01-02 | 2009-07-09 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Vorrichtung zur Befestigung eines Sensorgehäuses an einem Gehäuse, insbesondere einem Zylindergehäuse |
DE202009005037U1 (de) * | 2009-07-17 | 2010-12-30 | Turck Holding Gmbh | Nutschalter |
DE102009048272B3 (de) * | 2009-10-05 | 2011-04-21 | Sick Ag | Verfahren zum Positionieren eines magnetischen Sensors |
JP1638139S (de) * | 2018-04-04 | 2019-08-05 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0723859U (ja) | 1993-10-07 | 1995-05-02 | エスエムシー株式会社 | シリンダ装置 |
DE19643413C2 (de) | 1996-10-24 | 1999-11-25 | Soyck Gmbh | Halterung für Magnetfeldsensoren |
DE19648679C2 (de) | 1996-11-25 | 1999-10-14 | Bosch Gmbh Robert | Zylinderschalter |
DE19653222C2 (de) * | 1996-12-20 | 1999-04-01 | Soyck Gmbh | Halterung für Magnetfeldsensoren |
AT405674B (de) * | 1997-04-08 | 1999-10-25 | Hygrama Ag | Pneumatischer oder hydraulischer zylinder |
JP3857734B2 (ja) | 1997-07-10 | 2006-12-13 | ヴェルナー・トゥルク・ゲーエムベーハー・ウント・ツェーオー.カーゲー | T形状スロット内に挿入可能な近接スイッチないし近接スイッチ用固定要素 |
JP2001280310A (ja) * | 2000-03-31 | 2001-10-10 | Nok Corp | 空気圧機器におけるセンサ取付機構 |
DE10038001B4 (de) * | 2000-08-04 | 2008-09-18 | Balluff Gmbh | Sensoranordnung |
DE20108649U1 (de) * | 2001-05-23 | 2001-08-30 | Bernstein Ag | Sensor und Profilnutgehäuse |
DE20218204U1 (de) * | 2002-11-22 | 2003-02-06 | Sick Ag | Halterung für Magnetfeldsensoren |
-
2002
- 2002-03-27 DE DE20204874U patent/DE20204874U1/de not_active Expired - Lifetime
-
2003
- 2003-03-05 AT AT03004762T patent/ATE274181T1/de not_active IP Right Cessation
- 2003-03-05 DE DE50300056T patent/DE50300056D1/de not_active Expired - Lifetime
- 2003-03-05 EP EP03004762A patent/EP1348935B1/de not_active Expired - Lifetime
- 2003-03-26 US US10/401,528 patent/US6868771B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2372168A1 (de) | 2010-03-26 | 2011-10-05 | Sick AG | Halterung für Magnetfeldsensoren |
Also Published As
Publication number | Publication date |
---|---|
DE50300056D1 (de) | 2004-09-23 |
US6868771B2 (en) | 2005-03-22 |
ATE274181T1 (de) | 2004-09-15 |
EP1348935A1 (de) | 2003-10-01 |
DE20204874U1 (de) | 2002-12-12 |
US20040031385A1 (en) | 2004-02-19 |
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