WO2001098699A1 - A driving device including a position indicator - Google Patents

A driving device including a position indicator Download PDF

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Publication number
WO2001098699A1
WO2001098699A1 PCT/NL2001/000439 NL0100439W WO0198699A1 WO 2001098699 A1 WO2001098699 A1 WO 2001098699A1 NL 0100439 W NL0100439 W NL 0100439W WO 0198699 A1 WO0198699 A1 WO 0198699A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive shaft
driving device
feeler pin
cam surface
position indicator
Prior art date
Application number
PCT/NL2001/000439
Other languages
French (fr)
Other versions
WO2001098699A8 (en
Inventor
Floris Johannes Groeneveld
Original Assignee
Ei-O-Matic B.V.
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 Ei-O-Matic B.V. filed Critical Ei-O-Matic B.V.
Priority to AU2001274665A priority Critical patent/AU2001274665A1/en
Priority to EP01941305A priority patent/EP1295058B1/en
Priority to JP2002504420A priority patent/JP4871483B2/en
Priority to DK01941305T priority patent/DK1295058T3/en
Priority to AT01941305T priority patent/ATE291713T1/en
Priority to DE60109614T priority patent/DE60109614T2/en
Priority to US10/312,306 priority patent/US6925958B2/en
Publication of WO2001098699A1 publication Critical patent/WO2001098699A1/en
Publication of WO2001098699A8 publication Critical patent/WO2001098699A8/en

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
    • F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
    • F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
    • F15B15/065—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement the motor being of the rack-and-pinion 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
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0008—Mechanical means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating

Definitions

  • a driving device including a position indicator
  • the invention relates to a driving device comprising a drive shaft that is rotatably supported in a housing, which driving device includes a position indicator for said drive shaft.
  • driving devices are generally known. In various uses of such driving devices it is important to the user to be able to inform himself of the rotational position of the drive shaft, since this position provides information about the status of the device that is being driven.
  • An example of such a device is a driving device which is used for actuating a closing element of a valve.
  • a position indicator on a free end of the drive shaft, from which position indicator the angular position of the drive shaft can be directly read.
  • Information about the angular position may also form an important parameter within a control system.
  • a free drive shaft end is not always available, however. This is for example the case when both ends of the drive shaft are, or can be, connected to the device that is to be driven.
  • the object of the invention is to make it possible for the user of the driving device to determine the angular position of the drive shaft in a simple and accurate manner.
  • the driving device is characterized in that a cam is present on the drive shaft, whose cam surface mates with one end of a feeler pin which extends perpendicularly to the drive shaft, and which end is pressed against said cam surface under spring pressure, all this in such a manner that movement of the feeler pin in its longitudinal direction, which is effected by the cam surface upon rotation of the drive shaft, provides an indication as regards the angular displacement of the drive shaft.
  • a cam is present on the drive shaft, whose cam surface mates with one end of a feeler pin which extends perpendicularly to the drive shaft, and which end is pressed against said cam surface under spring pressure, all this in such a manner that movement of the feeler pin in its longitudinal direction, which is effected by the cam surface upon rotation of the drive shaft, provides an indication as regards the angular displacement of the drive shaft.
  • said feeler pin is movably supported in a support member which is movable in a direction perpendicularly to the central axis of the drive shaft, and which is pressed against a surface which extends concentrically about the central axis of the drive shaft under spring pressure.
  • Figure 1 is a schematic view of spaced-apart parts of a known driving device and part of a valve by means of which said driving device can be opened and closed.
  • Figure 2 schematically shows the drive shaft fitted with a detection system for the angular displacement of the drive shaft.
  • Figure 3 is a view corresponding to Figure 2, wherein the drive shaft has been turned through 90 ° .
  • FIG. 1 schematically shows a driving device 1 which is known per se, which driving device includes a connecting surface 2 on its bottom side, which defines an opening through which the lower end of a drive shaft 3 is accessible, as is indicated by means of an arrow A.
  • said driving element can be mounted on a flange 5 of a valve 6.
  • a closure element supported in said valve which can conventionally be made up of a disc, a ball or a plug, is attached to a shaft 7 which projects above said flange, which shaft includes an end part 8 of square section.
  • Said square end part 8 can be received in a square hole 10 formed in connecting piece 9.
  • Said connecting piece 9 forms part of the drive shaft 3 for connection to said end part 8.
  • one end of the drive shaft 3 generally projects above the housing in the known embodiment, on the side of the housing remote from the connecting surface, for the purpose of connecting position indicators or the like thereto.
  • a disc-shaped member 25 is mounted on drive shaft 3, which disc-shaped member comprises a cylindrical part 26, whose outer circumference extends concentrically about the central axis 3 1 of shaft 3, as well as a cam part 27 formed integrally therewith, which includes a curved cam surface 28 extending over part of the circumference thereof.
  • Said cam surface 28 mates with the end of a feeler pin 29 which extends perpendicularly to the central axis of drive shaft.
  • Said feeler pin 29 is movably accommodated in its longitudinal direction in a guide bush 32 consisting of two parts 30 and 31, which guide bush is accommodated in a stepped bore 33 formed in the housing of the driving device.
  • a compression spring 34 surrounding feeler pin 29, which spring is confined between a shoulder 35 formed in the interior of said guide bush and a ring 36 attached to said feeler pin, all this in such a manner that spring 34 tends to keep the end of feeler pin 29 in abutment with cam surface 28.
  • Guide bush 32 is movably accommodated, in a direction parallel to the longitudinal direction of pin 29, in the bore 33 formed in housing 1. Said guide bush is thereby surrounded by a compression spring 37, which is confined between a shoulder 38 formed on said guide bush and a cover (not shown) which closes said bore 33 in the housing, all this in such a manner that said spring attempts to keep the end of guide bush 32 in abutment with the outer circumference of the circular part 26 of disc-shaped member 25 in the manner that is shown in Figures 2 and 3.
  • feeler pin 29 will be pushed outwards upon rotation of drive shaft 3 through an angle of 90 ° from the position that is shown in Figure 2 to the position that is shown in Figure 3, which rotation will generally correspond to the rotation of the closure element of a valve, which is connected to said drive shaft, between an open position and a closed position, or vice versa, wherein the distance over which pin 29 is pushed outwards is related to the angle through which the drive shaft has rotated.
  • Said movement of the feeler pin 29 can be detected, for example, by means of a sensor 40 mounted on one end of guide bush 32, and be suitably displayed by means of said sensor.
  • any play in the support for drive shaft 3 may lead to a shift in the position of the central axis 3 1 of the drive shaft 3 upon rotation of the drive shaft.
  • the outer circumference of the disc-shaped member 26, and thus the guide bush 32 will shift in a direction parallel to the direction of movement of feeler pin 29.
  • a possible shift of the central axis 3 1 of the drive shaft 3 will not affect the relative movement between the feeler pin 29 and the guide bush 32 supporting said feeler pin, on which sensor 40 is mounted, so that such movement of shaft 3 will not influence the result of the measurement of the angular displacement.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Telephone Function (AREA)
  • Measuring Fluid Pressure (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

This invention relates to a driving device (1) comprising a drive shaft (3) that is rotatably supported in a housing, which driving device includes a position indicator for said drive shaft, wherein a cam (27) is present on the drive shaft, whose cam surface mates with one end of a feeler pin (29) which extends perpendicularly to the drive shaft, and which end is pressed against said cam surface under spring pressure (37), all this in such manner that movement of the feeler pin in its longitudinal direction, which is effected by the cam surface upon rotation of the drive shaft, provides an indication as regards the angular displacement of the drive shaft.

Description

A driving device including a position indicator
DESCRIPTION
The invention relates to a driving device comprising a drive shaft that is rotatably supported in a housing, which driving device includes a position indicator for said drive shaft. Such driving devices are generally known. In various uses of such driving devices it is important to the user to be able to inform himself of the rotational position of the drive shaft, since this position provides information about the status of the device that is being driven. An example of such a device is a driving device which is used for actuating a closing element of a valve.
It is known to mount a position indicator on a free end of the drive shaft, from which position indicator the angular position of the drive shaft can be directly read. Information about the angular position may also form an important parameter within a control system. A free drive shaft end is not always available, however. This is for example the case when both ends of the drive shaft are, or can be, connected to the device that is to be driven. The object of the invention is to make it possible for the user of the driving device to determine the angular position of the drive shaft in a simple and accurate manner.
In order to accomplish that objective, the driving device according to the invention is characterized in that a cam is present on the drive shaft, whose cam surface mates with one end of a feeler pin which extends perpendicularly to the drive shaft, and which end is pressed against said cam surface under spring pressure, all this in such a manner that movement of the feeler pin in its longitudinal direction, which is effected by the cam surface upon rotation of the drive shaft, provides an indication as regards the angular displacement of the drive shaft. With such a device it is possible to obtain an indication of the angular position of the drive shaft without using one of the free ends of the drive shaft.
In an advantageous embodiment, said feeler pin is movably supported in a support member which is movable in a direction perpendicularly to the central axis of the drive shaft, and which is pressed against a surface which extends concentrically about the central axis of the drive shaft under spring pressure. With such an embodiment, any play in the support of the drive shaft will not affect the relation between the angular position of the drive shaft and the position of the feeler pin with respect to the supporting member. For that reason, a sensor may advantageously be mounted on the supporting member.
The invention will now be explained in more detail with reference to the accompanying figures.
Figure 1 is a schematic view of spaced-apart parts of a known driving device and part of a valve by means of which said driving device can be opened and closed.
Figure 2 schematically shows the drive shaft fitted with a detection system for the angular displacement of the drive shaft.
Figure 3 is a view corresponding to Figure 2, wherein the drive shaft has been turned through 90°.
By way of a non-limitative example, a description of a driving device suitable for implementation of the invention will now be given with reference to Figure 1.
Figure 1 schematically shows a driving device 1 which is known per se, which driving device includes a connecting surface 2 on its bottom side, which defines an opening through which the lower end of a drive shaft 3 is accessible, as is indicated by means of an arrow A.
Using a connecting piece 4, said driving element can be mounted on a flange 5 of a valve 6. A closure element supported in said valve, which can conventionally be made up of a disc, a ball or a plug, is attached to a shaft 7 which projects above said flange, which shaft includes an end part 8 of square section. Said square end part 8 can be received in a square hole 10 formed in connecting piece 9. Said connecting piece 9 forms part of the drive shaft 3 for connection to said end part 8. As is shown in the figure, one end of the drive shaft 3 generally projects above the housing in the known embodiment, on the side of the housing remote from the connecting surface, for the purpose of connecting position indicators or the like thereto.
Determination of the position of the drive shaft takes place by means of the mechanism that is shown in Figures 2 and 3. As is shown in said figures, a disc-shaped member 25 is mounted on drive shaft 3, which disc-shaped member comprises a cylindrical part 26, whose outer circumference extends concentrically about the central axis 31 of shaft 3, as well as a cam part 27 formed integrally therewith, which includes a curved cam surface 28 extending over part of the circumference thereof. Said cam surface 28 mates with the end of a feeler pin 29 which extends perpendicularly to the central axis of drive shaft. Said feeler pin 29 is movably accommodated in its longitudinal direction in a guide bush 32 consisting of two parts 30 and 31, which guide bush is accommodated in a stepped bore 33 formed in the housing of the driving device.
Disposed in the interior of said guide pin is a compression spring 34 surrounding feeler pin 29, which spring is confined between a shoulder 35 formed in the interior of said guide bush and a ring 36 attached to said feeler pin, all this in such a manner that spring 34 tends to keep the end of feeler pin 29 in abutment with cam surface 28.
Guide bush 32 is movably accommodated, in a direction parallel to the longitudinal direction of pin 29, in the bore 33 formed in housing 1. Said guide bush is thereby surrounded by a compression spring 37, which is confined between a shoulder 38 formed on said guide bush and a cover (not shown) which closes said bore 33 in the housing, all this in such a manner that said spring attempts to keep the end of guide bush 32 in abutment with the outer circumference of the circular part 26 of disc-shaped member 25 in the manner that is shown in Figures 2 and 3.
It will be understood that feeler pin 29 will be pushed outwards upon rotation of drive shaft 3 through an angle of 90° from the position that is shown in Figure 2 to the position that is shown in Figure 3, which rotation will generally correspond to the rotation of the closure element of a valve, which is connected to said drive shaft, between an open position and a closed position, or vice versa, wherein the distance over which pin 29 is pushed outwards is related to the angle through which the drive shaft has rotated. Said movement of the feeler pin 29 can be detected, for example, by means of a sensor 40 mounted on one end of guide bush 32, and be suitably displayed by means of said sensor. As is indicated in Figures 2 and 3, any play in the support for drive shaft 3 may lead to a shift in the position of the central axis 31 of the drive shaft 3 upon rotation of the drive shaft. As a consequence, also the outer circumference of the disc-shaped member 26, and thus the guide bush 32, will shift in a direction parallel to the direction of movement of feeler pin 29. Thus, a possible shift of the central axis 31 of the drive shaft 3 will not affect the relative movement between the feeler pin 29 and the guide bush 32 supporting said feeler pin, on which sensor 40 is mounted, so that such movement of shaft 3 will not influence the result of the measurement of the angular displacement.

Claims

1. A driving device comprising a drive shaft that is rotatably supported in a housing, which driving device includes a position indicator for said drive shaft, characterized in that a cam is present on the drive shaft, whose cam surface mates with one end of a feeler pin which extends perpendicularly to the drive shaft, and which end is pressed against said cam surface under spring pressure, all this in such a manner that movement of the feeler pin in its longitudinal direction, which is effected by the cam surface upon rotation of the drive shaft, provides an indication as regards the angular displacement of the drive shaft.
2. A driving device according to claim 1, characterized in that said feeler pin is movably supported in a support member which is movable in a direction perpendicularly to the central axis of the drive shaft, and which is pressed against a surface which extends concentrically about the central axis of the drive shaft under spring pressure.
3. A driving device according to claim 2, characterized in that said support member is made up of a guide bush in which said feeler pin is movably accommodated.
4. A driving device according to claim 1, 2 or 3, characterized in that said movement of the feeler pin is detected by a sensor.
5. A driving device according to claim 2 or 4, characterized in that said sensor is mounted on said support member.
PCT/NL2001/000439 2000-06-28 2001-06-11 A driving device including a position indicator WO2001098699A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AU2001274665A AU2001274665A1 (en) 2000-06-28 2001-06-11 A driving device including a position indicator
EP01941305A EP1295058B1 (en) 2000-06-28 2001-06-11 A driving device including a position indicator
JP2002504420A JP4871483B2 (en) 2000-06-28 2001-06-11 Drive device with position indicator
DK01941305T DK1295058T3 (en) 2000-06-28 2001-06-11 Drive device with position indicator
AT01941305T ATE291713T1 (en) 2000-06-28 2001-06-11 DRIVE DEVICE WITH POSITION INDICATOR
DE60109614T DE60109614T2 (en) 2000-06-28 2001-06-11 DRIVE DEVICE WITH POSITION INDICATOR
US10/312,306 US6925958B2 (en) 2000-06-28 2001-06-11 Driving device including a position indicator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1015551 2000-06-28
NL1015551A NL1015551C2 (en) 2000-06-28 2000-06-28 Drive device with position indicator.

Publications (2)

Publication Number Publication Date
WO2001098699A1 true WO2001098699A1 (en) 2001-12-27
WO2001098699A8 WO2001098699A8 (en) 2004-04-08

Family

ID=19771615

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2001/000439 WO2001098699A1 (en) 2000-06-28 2001-06-11 A driving device including a position indicator

Country Status (9)

Country Link
US (1) US6925958B2 (en)
EP (1) EP1295058B1 (en)
JP (1) JP4871483B2 (en)
AT (1) ATE291713T1 (en)
AU (1) AU2001274665A1 (en)
DE (1) DE60109614T2 (en)
DK (1) DK1295058T3 (en)
NL (1) NL1015551C2 (en)
WO (1) WO2001098699A1 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
NL1022188C2 (en) * 2002-12-17 2004-06-18 Actuator Technology Company B Valve actuator for e.g. shut off valve for offshore applications, comprises fixed piston and moving cylinder surrounded by tube

Families Citing this family (5)

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GB0426948D0 (en) * 2004-12-09 2005-01-12 Goodrich Actuation Systems Ltd Indicator device
IL197320A0 (en) * 2009-02-26 2009-12-24 Bermad Ltd Partnership Pressure management hydraulic control valve
GB2544538B (en) * 2015-11-20 2020-12-09 Lb Bentley Ltd Valve actuator indicator arrangement
US10619758B2 (en) 2016-03-03 2020-04-14 Emerson Process Management, Valve Automation, Inc. Methods and apparatus for automatically detecting the failure configuration of a pneumatic actuator
US11174964B2 (en) * 2018-10-29 2021-11-16 Fisher Controls International Llc Position transmitter assemblies for use with actuators

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CH371830A (en) * 1959-05-06 1963-09-15 Elektro Watt Elektrische Und I Position indicators for mechanisms with two operating systems, in particular switches, disconnectors, valves, etc.
FR2271471A1 (en) * 1974-05-14 1975-12-12 Petrolieres Et Non return-type flap valve - has clamped flap mounting ring with indicating cam mounted on shaft
US4353390A (en) * 1979-12-06 1982-10-12 Anchor/Darling Valve Company Swing check valve with internally balanced disc
JPH1182805A (en) * 1997-09-10 1999-03-26 Katsuji Shoji Valve manually operating machine
JP2000170953A (en) * 1998-12-02 2000-06-23 Kubota Corp Opening display device of valve

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CH371830A (en) * 1959-05-06 1963-09-15 Elektro Watt Elektrische Und I Position indicators for mechanisms with two operating systems, in particular switches, disconnectors, valves, etc.
FR2271471A1 (en) * 1974-05-14 1975-12-12 Petrolieres Et Non return-type flap valve - has clamped flap mounting ring with indicating cam mounted on shaft
US4353390A (en) * 1979-12-06 1982-10-12 Anchor/Darling Valve Company Swing check valve with internally balanced disc
JPH1182805A (en) * 1997-09-10 1999-03-26 Katsuji Shoji Valve manually operating machine
JP2000170953A (en) * 1998-12-02 2000-06-23 Kubota Corp Opening display device of valve

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1022188C2 (en) * 2002-12-17 2004-06-18 Actuator Technology Company B Valve actuator for e.g. shut off valve for offshore applications, comprises fixed piston and moving cylinder surrounded by tube

Also Published As

Publication number Publication date
EP1295058B1 (en) 2005-03-23
JP2004501331A (en) 2004-01-15
WO2001098699A8 (en) 2004-04-08
DE60109614D1 (en) 2005-04-28
AU2001274665A1 (en) 2002-01-02
US6925958B2 (en) 2005-08-09
JP4871483B2 (en) 2012-02-08
ATE291713T1 (en) 2005-04-15
US20030172754A1 (en) 2003-09-18
EP1295058A1 (en) 2003-03-26
NL1015551C2 (en) 2002-01-02
DK1295058T3 (en) 2005-05-30
DE60109614T2 (en) 2006-02-02

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