EP3009691A1 - Actionneur à depression - Google Patents

Actionneur à depression Download PDF

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Publication number
EP3009691A1
EP3009691A1 EP15187573.9A EP15187573A EP3009691A1 EP 3009691 A1 EP3009691 A1 EP 3009691A1 EP 15187573 A EP15187573 A EP 15187573A EP 3009691 A1 EP3009691 A1 EP 3009691A1
Authority
EP
European Patent Office
Prior art keywords
socket housing
plunger
vacuum box
box according
deformation
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Withdrawn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
EP15187573.9A
Other languages
German (de)
English (en)
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.)
Murrplastik Produktionstechnik GmbH
Original Assignee
Murrplastik Produktionstechnik 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 Murrplastik Produktionstechnik GmbH filed Critical Murrplastik Produktionstechnik GmbH
Publication of EP3009691A1 publication Critical patent/EP3009691A1/fr
Withdrawn legal-status Critical Current

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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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/10—Characterised by the construction of the motor unit the motor being of diaphragm type
    • 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
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2838—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT with out using position sensors, e.g. by volume flow measurement or pump speed

Definitions

  • the invention relates to a vacuum unit according to the preamble of claim 1.
  • Vacuum boxes are used as switching elements, for example in motor vehicle construction, where a movable component such as a fan door between two switching positions (for example, open and closed) to be moved back and forth.
  • Known vacuum cans have a socket housing, inside which a membrane is arranged, which is pulled over a plunger plate of a projecting from the socket housing plunger and includes an airtight pressure chamber together with the plunger plate and a part of the socket housing.
  • the pressure chamber can be evacuated to move the plunger and filled with gas, wherein the movement of the plunger takes place against the restoring force of a supported between the plunger plate and the socket housing compression spring. In this case, only two positions of the plunger are provided in most vacuum cans, and there is no determination or adjustment of the plunger position.
  • a vacuum box is known in which the spring is supported on an inner side of the socket housing adapter and means are provided to measure the voltage caused by the support of the spring on the socket housing on this. By means of an evaluation can on the basis of the measured voltage in the socket housing on the Be closed position of the plunger.
  • the WO 02/33283 A2 described vacuum adapter but supports the intermediate piece by means of a ring encircling ring on the socket housing, so that it is in contact with a relatively large area of the socket housing.
  • mechanical stresses generated by the spring force in the socket housing are either difficult to measure, or the socket housing has to be made thin in a relatively large area, which in turn impairs its stability.
  • the invention is based on the idea to act on the socket housing only with a central ganpartie of the intermediate piece around which a support surface rotates, on which the second end of the compression spring is supported.
  • the force applied to the can body can then be concentrated to a small area, so that the deformation portion of the can body can be kept small.
  • the support of the compression spring on the peripheral around the plant support surface results in a highly uniform and reproducible loading of the deformation section, even if the plunger is tilted against its longitudinal direction a piece.
  • the measuring device the deformation of the deformation part is measured, so that it can be deduced on the spring force and thus on the position of the plunger.
  • the measuring device has at least one strain gauge. This is preferably on a side facing away from the deformation part arranged a plate which rests flat on the deformation part. A deformation of the deformation section then leads to a deformation of the plate, which is measured by means of the at least one strain gauge.
  • the measuring device may have evaluation electronics for evaluating a signal generated by the at least one strain gauge. Thus, the deformations measured by the measuring strip or strips can be evaluated automatically.
  • the measuring device is detachably connected to the socket housing, in particular by means of a bayonet lock or a latching connection.
  • the measuring device can then be easily replaced, and the vacuum unit is also functional when the measuring device is removed from the socket housing.
  • this advantageously has at least in sections a smaller and preferably less than half the wall thickness than the other parts of the socket housing.
  • the region with the smaller wall thickness may form a preferably small to point-shaped central portion of a wall of the socket housing or be annular, in the latter case surrounding a central region whose wall thickness is greater than the wall thickness of the annular region.
  • the central area can act centering on the plant section, and its wall thickness is expedient at least as large as the wall thickness of the other parts of the socket housing.
  • the socket housing on a projecting into the pressure chamber guide sleeve, in which the central investment section of the intermediate piece is added.
  • the support surface may be arranged circumferentially around the guide sleeve.
  • the illustrated in the drawing vacuum box 10 has a socket housing 12 made of plastic, which is assembled from two housing parts 14, 16. It also has a plunger 18 which is provided at its one end with a plunger plate 20 and (not shown in the drawing) is performed by the second housing part 16, so that its second end protrudes from the socket housing 12. Between the housing parts 14, 16, an elastically stretchable membrane 22 is clamped, which is connected to the plunger 18 in the region of the plunger plate 20 and together with the plunger plate 20 and the first housing part 14 includes a pressure chamber 24 which can be evacuated via a connection, not shown and can be filled with air. An evacuation of the pressure chamber 24 results in a movement of the plunger 18 upwards, since in the delimiting to the other side of the membrane 22 interior region 26 of the socket housing 12 is always ambient pressure.
  • a arranged in the pressure chamber 24 compression spring 28 is provided, which is supported with its first end 30 on the plunger plate 20.
  • an intermediate piece 32 is provided, which has a ring-encircling support surface 34 on which the second end 36 of the compression spring 28 is supported.
  • the intermediate piece 32 is guided on a guide sleeve 40 projecting downwards from a ceiling wall 38 of the first housing part 14, wherein the support surface 34 is arranged surrounding the guide sleeve 40.
  • a plant section 42 of the intermediate piece 32 is arranged, which is integrally connected to the support surface 34 and abuts a deformation portion 44 of the ceiling wall 38.
  • the deformation part 44 is arranged centrally in the middle of the ceiling wall 38 and makes up less than 5% of its surface.
  • the plant section 42 has an upwardly projecting, applied to the deformation portion projection 45, the engagement of which acts in the predetermined by the deformation portion 44 recess in the top wall 38 centering.
  • the deformation part 44 is made thinner than the other parts of the Can body 12 and has in the illustrated embodiment has a thickness of less than 0.6 mm, while the socket housing 12 is otherwise made at least 1.2 mm thick.
  • An increase in the spring force of the compression spring 28 leads to an increase in the application of force to the deformation section 44 by the plant section 42, which results in a deformation of the deformation section 44.
  • a measuring device 46 is provided, which is placed on the outside 48 of the ceiling wall 38 and fastened there by means of a bayonet closure.
  • the measuring device 46 has a plate 50, which rests flat on the deformation part 44.
  • a plurality of strain gauges 52 are arranged on its side facing away from the deformation part 44, which generate a characteristic for the deformation of the deformation part 44, which affects in a deformation of the plate 50 signal, which via a line 54 to one in the drawing evaluation electronics, not shown, are conducted and evaluated.
  • the transmitter can then determine the position of the plunger 18 and even control the movement of the plunger 18 with appropriate programming.
  • four strain gauges are arranged in a Wheatstone bridge.
  • the invention relates to a vacuum box 10 with a socket housing 12, with a guided through the socket housing 12 plunger 18, with a connected to the socket housing 12 and the plunger 18 membrane 22, with a trapped by the socket housing 12, the plunger 18 and the membrane 22 for moving the plunger 18 between two end positions evacuated and gas-filled pressure chamber 24, with a first end 30 within the socket housing 12 supported on the plunger 18 compression spring 28 and arranged between the plunger 18 and the socket housing 12 intermediate piece 32, the on the socket housing 12 and against which the compression spring 28 is supported with its second end 36.
  • the Intermediate piece 32 has an at least partially applied to a deformation portion 44 of the socket housing 12 central conditioning section 42 and a peripheral portion around the plant 42 supporting surface 34 on which the second end 36 of the compression spring 28 is supported, and that on an outer side 48 of the socket housing 12 a measuring device 46 is arranged to measure a deformation of the deformation section 44.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Measuring Fluid Pressure (AREA)
EP15187573.9A 2014-10-15 2015-09-30 Actionneur à depression Withdrawn EP3009691A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014015058.5A DE102014015058A1 (de) 2014-10-15 2014-10-15 Unterdruckdose

Publications (1)

Publication Number Publication Date
EP3009691A1 true EP3009691A1 (fr) 2016-04-20

Family

ID=54256546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15187573.9A Withdrawn EP3009691A1 (fr) 2014-10-15 2015-09-30 Actionneur à depression

Country Status (2)

Country Link
EP (1) EP3009691A1 (fr)
DE (1) DE102014015058A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4321761A1 (fr) * 2022-08-11 2024-02-14 Robert Bosch GmbH Dispositif de détection, unité de tube cylindrique et procédé de détection d'une position d'un piston dans un tube cylindrique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5450930A (en) * 1993-12-09 1995-09-19 Mgm Brakes Heavy duty electronic brake stroke indicator
WO2002033283A2 (fr) 2000-10-16 2002-04-25 Veridian Engineering, Incorporated Capteurs de vehicule
DE102005057914A1 (de) * 2005-12-02 2007-01-11 Alfmeier Präzision AG Baugruppen und Systemlösungen Pneumatischer oder hydraulischer Aktuator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19929074A1 (de) * 1999-06-25 2000-12-28 Mann & Hummel Filter Stelleinrichtung mit Sensor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5450930A (en) * 1993-12-09 1995-09-19 Mgm Brakes Heavy duty electronic brake stroke indicator
WO2002033283A2 (fr) 2000-10-16 2002-04-25 Veridian Engineering, Incorporated Capteurs de vehicule
DE102005057914A1 (de) * 2005-12-02 2007-01-11 Alfmeier Präzision AG Baugruppen und Systemlösungen Pneumatischer oder hydraulischer Aktuator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4321761A1 (fr) * 2022-08-11 2024-02-14 Robert Bosch GmbH Dispositif de détection, unité de tube cylindrique et procédé de détection d'une position d'un piston dans un tube cylindrique

Also Published As

Publication number Publication date
DE102014015058A1 (de) 2016-04-21

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