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WO2015040150A1 - Dispositif de surveillance de position pour actionneur linéaire - Google Patents

Dispositif de surveillance de position pour actionneur linéaire Download PDF

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Publication number
WO2015040150A1
WO2015040150A1 PCT/EP2014/069975 EP2014069975W WO2015040150A1 WO 2015040150 A1 WO2015040150 A1 WO 2015040150A1 EP 2014069975 W EP2014069975 W EP 2014069975W WO 2015040150 A1 WO2015040150 A1 WO 2015040150A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
groove
longitudinal body
magnetic position
position sensor
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.)
Ceased
Application number
PCT/EP2014/069975
Other languages
English (en)
Inventor
Martin Engels
Roland Verhulsdonk
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.)
Norgren GmbH
Original Assignee
Norgren GmbH
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 Norgren GmbH filed Critical Norgren GmbH
Priority to DE112014004317.6T priority Critical patent/DE112014004317B4/de
Publication of WO2015040150A1 publication Critical patent/WO2015040150A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F15B15/20—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
    • 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
    • F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches

Definitions

  • the present Application relates to linear cylinders, and more particularly, to a position monitor for a linear cylinders.
  • Linear cylinders including fluid actuators, are important for many industrial applications such as food and beverage production.
  • Food and beverage production requires a high standard of cleanliness.
  • Equipment that is easy to clean helps operators streamline production and control costs.
  • Traditional linear cylinders include components that attach to the outside of a main body, making the body of the cylinder uneven and difficult to clean. So called "cleanline" designed cylinder barrels enclose fluid actuator parts inside of a smooth housing, making the cylinders much easier to clean in support of wash-down operation.
  • One example of a linear cylinder including cleanline design is an integrated valve actuator cylinder (IVAC). Enclosing components inside a cylinder housing can make servicing the cylinder difficult, however. In some industrial applications, the ability to easily replace, reconfigure or repair a cylinder is highly desirable.
  • magnetic position sensors may be affixed to opposite ends of a linear actuator to determine when the internal piston is at each end.
  • magnetic position sensor devices are integrated under the smooth cylinder barrel. If a position monitor switch replacement is desired, the cylinders must be disassembled, making the magnetic position sensors difficult to replace and repair.
  • a linear cylinder is provided according to an embodiment.
  • the linear cylinder includes a housing.
  • the housing includes a longitudinal body having a first end and a second end.
  • the longitudinal body includes a first groove inset in the direction of an interior of the housing at the first end.
  • the linear cylinder further includes a piston within the housing that is operable to move reciprocally between the first end and the second end.
  • the linear cylinder further includes a first magnetic position sensor positioned in the first groove.
  • a linear cylinder housing is provided according to an embodiment.
  • the linear cylinder housing includes a longitudinal body.
  • the longitudinal body includes a first end and a second end.
  • the longitudinal body further includes a first groove positioned at the first end.
  • the first groove is inset in the direction of an interior of the housing and configured to receive a first magnetic position sensor.
  • a method for assembling a linear cylinder includes the step of positioning a piston within a housing.
  • the housing includes a longitudinal body having a first end and a second end.
  • the piston is operable to move reciprocally within the housing between the first end and the second end.
  • the method further includes the step of positioning a first magnetic position sensor in a first groove of a housing.
  • the first groove is positioned at the first end of the longitudinal body, inset in the direction of an interior of the housing.
  • the method further includes the step of coupling a first magnetic position sensor to the first groove using a bracket.
  • the first groove is inset at the first end in the direction of the interior of the housing such that a detector portion of the first magnet position sensor does not extend beyond an exterior of the longitudinal body.
  • the linear cylinder apparatus of claim 1 wherein the first groove does not extend to the second end.
  • a second groove is included at the second end of the longitudinal body, and a second magnetic position sensor is positioned in the second groove.
  • a bracket is included, the bracket operable to couple the first magnetic position sensor to the first groove.
  • the first magnetic position sensor includes a lead oriented towards the second end of the longitudinal body.
  • the first groove is inset in the direction of the interior of the housing such that a detector portion of a first magnetic position sensor does not extend beyond an exterior of the longitudinal body.
  • the first groove does not extend to the second end.
  • a second groove is included at the second end of the longitudinal body and a second magnetic position sensor is positioned in the second groove.
  • a bracket is operable to couple the first magnetic position sensor to the first groove.
  • the first magnetic position sensor includes a lead oriented towards the center of the longitudinal body.
  • One embodiment of the method further includes the step of coupling a second magnetic position sensor to a second groove, the second groove positioned at the second end of the longitudinal body.
  • Figure 1 depicts a linear cylinder 100 in accordance with an embodiment.
  • Figure 2 depicts a magnetic position sensor assembly 200 in accordance with an embodiment.
  • Figure 3 depicts a method 300 in accordance with an embodiment.
  • FIGs. 1-3 and the following description depict specific examples to teach those skilled in the art how to make and use the best mode of the Application. For the purpose of teaching inventive principles, some conventional aspects have been simplified or omitted. Those skilled in the art will appreciate variations from these examples that fall within the scope of the Application. Those skilled in the art will appreciate that the features described below may be combined in various ways to form multiple variations of the Application. As a result, the Application is not limited to the specific examples described below, but only by the claims and their equivalents.
  • FIG. 1 depicts a profile view of a linear cylinder with external end monitoring devices, in accordance with an embodiment.
  • Linear cylinder 100 includes a housing 102, end caps 104A and 104B, a piston 106, a longitudinal body 108, first and second grooves 110 and 118, first and second magnetic sensors 112 and 120, first and second ends 114 and 116, magnetic position sensor assembly 200, ports 122, and screws 124.
  • Linear cylinder 100 is a linear actuator that includes a housing 102 and a piston 106.
  • Linear cylinder 100 may be a pneumatic cylinder, a hydraulic cylinder, or may operate with a liquid gas mix.
  • Piston 106 actuates back and forth inside housing 102 between end caps 104A and 104 B.
  • Housing 102 includes a longitudinal body 108 and end caps 104A and 104B.
  • Longitudinal body 108 encapsulates a space along a central axis, the longest dimension of which is capped with end caps 104A and 104B.
  • longitudinal body 108 is depicted as a hollow body having four faces oriented perpendicular to a central axis of the longitudinal body 108. The four faces connect to one another via rounded corners to create a cross-sectional shape of a square with rounded corners. This is not intended to be limiting, however, as longitudinal body 108 may have other cross-sectional shapes as well.
  • longitudinal body 108 may be substantially circular, oval, square, or any other shape commonly known to those of skill in the art.
  • End caps 104A and 104B are configured to fit onto opposing sides of
  • End caps 104 A and 104B may include various features and fittings, as will be understood by those of skill in the art.
  • end caps 104A and 104B may provide fittings to securely position and seal piston 106.
  • End caps 104 may further include fittings for fasteners to assemble end caps 104A and 104B to longitudinal body 108.
  • end cap 104A includes bores for each of four screws 124.
  • End caps 104 may further include input, output, and pilot ports 122.
  • Linear cylinder 100 includes two grooves 110 and 118 that are positioned on longitudinal body 108.
  • Groove 110 is positioned adjacent to first end 114 of longitudinal body 108
  • groove 118 is positioned adjacent to second end 116 of longitudinal body 108.
  • Grooves 110 and 118 are oriented to be substantially parallel to the axis of piston 106.
  • the long dimension of grooves 110 and 118 are aligned with one another. This is not intended to be limiting, however.
  • grooves 110 and 118 may be offset from one another, positioned in different faces of longitudinal body 108, or positioned on the same end of longitudinal body 108.
  • Linear cylinder 100 includes two magnetic position sensors 112 and 120.
  • magnetic position sensors 112 and 120 may be reed switches, solid-state relay switches, or induction switches.
  • Piston 106 may include one or more magnetic elements (not shown) that generate magnetic fields detectable by magnetic position sensors 112 and 120. This is not intended to be limiting, however.
  • magnetic position sensors 112 and 120 may be any type of non-contact type sensors known to those of skill in the art.
  • FIG. 1 includes magnetic position sensor assembly 200.
  • FIG. 2 provides a detail of magnetic position sensor assembly 200.
  • Assembly 200 includes groove 110, a magnetic position sensor 112, screws 230, and a bracket 232.
  • Magnetic position sensor 112 further includes a lead 234 and a detector portion 236.
  • Bracket 232 spans the width of groove 110, and is fixed to longitudinal body 108 by two screws 230.
  • Lead 234 provides an electrical connection between the detector portion 236 of the magnetic position sensor 112 and electronics (not pictured) configured to receive the signal from detector portion 236.
  • grooves 110 and 118 are inset towards the center axis of longitudinal body 108.
  • grooves 110 and 118 are inset to minimize the protrusion of magnetic position sensors 112 and 120 from longitudinal body 108.
  • grooves 110 and 118 are inset so that no part of the detector portion 236 of magnetic position sensors 112 and 120 protrudes from longitudinal body 108.
  • grooves 110 and 118 are separate and not in contact with one another.
  • grooves 110 and 118 may be sized to minimally accommodate detector portion 236.
  • linear cylinder 100 may provide easy access to magnetic position sensors 112 and 118 without providing additional space where materials or contaminants may pool up, in keeping with cleanline design principles.
  • linear cylinder 100 includes two magnetic position sensors 112, but this is in no way intended to be limiting. Any number of magnetic position sensors may be included to detect any number of positions on longitudinal body 108.
  • grooves 110 and 118 may be formed into any shape to accommodate any type of position sensor, as will be appreciated by those of skill in the art.
  • magnetic position sensors 112 and 120 recessing magnetic position sensors 112 and 120 into grooves 110 and 118 on longitudinal body 108 allows the magnetic position sensors to be easily accessed without requiring disassembly of housing 102.
  • An operator may change a magnetic position sensor by simply removing bracket 232 and reattaching lead 234. As such, the magnetic position sensors 112 and 120 remain accessible while supporting wash-down operation of linear cylinder 100.
  • FIG. 3 depicts a method for assembling a linear cylinder 300 in accordance with an embodiment.
  • Method 300 begins with step 302.
  • a piston is positioned within a housing, the housing including a longitudinal body having a first end and a second end, the piston operable to move reciprocally within the housing between the first end and the second end.
  • piston 106 may be positioned within housing 102, as described above.
  • Method 300 continues with step 304.
  • a first magnetic position sensor is positioned in a first groove of a housing, the first groove positioned at the first end of the longitudinal body, inset in the direction of an interior of the housing.
  • first magnetic position sensor 112 may be positioned within first groove 110, as described above.
  • Method 300 continues with step 306.
  • a first magnetic position sensor is coupled to the first groove is using a bracket.
  • first magnetic position sensor 112 may be coupled to first groove 110 using bracket 232, as described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

L'invention concerne un cylindre linéaire (100), un logement de cylindre linéaire (102), et un procédé d'assemblage de cylindre linéaire. Le cylindre linéaire (100) comprend un logement (102) ayant un corps longitudinal (108). Un piston (106) est disposé dans le logement (102), et peut fonctionner en va-et-vient dans le logement (102). Le corps longitudinal (108) comprend une première extrémité (114), une seconde extrémité (116), et une première gorge (110) établie au niveau de la première extrémité (114). Un premier capteur de position magnétique (112) est positionné dans la première gorge (110). Une seconde gorge (118) et un second capteur de position magnétique (120) peuvent être fournis.
PCT/EP2014/069975 2013-09-19 2014-09-19 Dispositif de surveillance de position pour actionneur linéaire Ceased WO2015040150A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112014004317.6T DE112014004317B4 (de) 2013-09-19 2014-09-19 Positionsüberwachungsgerät für einen Linearantrieb

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361880015P 2013-09-19 2013-09-19
US61/880,015 2013-09-19

Publications (1)

Publication Number Publication Date
WO2015040150A1 true WO2015040150A1 (fr) 2015-03-26

Family

ID=51743408

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/069975 Ceased WO2015040150A1 (fr) 2013-09-19 2014-09-19 Dispositif de surveillance de position pour actionneur linéaire

Country Status (2)

Country Link
DE (1) DE112014004317B4 (fr)
WO (1) WO2015040150A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19800199A1 (de) * 1997-01-16 1998-09-24 Smc Corp Schalterbefestigungsmechanismus für Fluiddruckvorrichtungen
WO2011050969A2 (fr) * 2009-10-29 2011-05-05 Norgren Gmbh Actionneur commandé par fluide

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE275242T1 (de) 2001-02-22 2004-09-15 Festo Ag & Co Arbeitszylinder
ITBS20030093A1 (it) 2003-10-10 2005-04-11 Gimatic Spa Attrezzo di taglio o di presa con dispositivo per rilevarne il compimento dell'azione.
DE202004002852U1 (de) 2004-02-24 2004-04-22 Festo Ag & Co. Fluidbetätigter Arbeitszylinder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19800199A1 (de) * 1997-01-16 1998-09-24 Smc Corp Schalterbefestigungsmechanismus für Fluiddruckvorrichtungen
WO2011050969A2 (fr) * 2009-10-29 2011-05-05 Norgren Gmbh Actionneur commandé par fluide

Also Published As

Publication number Publication date
DE112014004317B4 (de) 2023-08-24
DE112014004317T5 (de) 2016-07-07

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