EP0092987A1 - Rotary fluid pressure actuator - Google Patents

Rotary fluid pressure actuator Download PDF

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Publication number
EP0092987A1
EP0092987A1 EP83302288A EP83302288A EP0092987A1 EP 0092987 A1 EP0092987 A1 EP 0092987A1 EP 83302288 A EP83302288 A EP 83302288A EP 83302288 A EP83302288 A EP 83302288A EP 0092987 A1 EP0092987 A1 EP 0092987A1
Authority
EP
European Patent Office
Prior art keywords
piston
pistons
toothed arm
chamber
plates
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.)
Granted
Application number
EP83302288A
Other languages
German (de)
French (fr)
Other versions
EP0092987B1 (en
Inventor
Joaquin Triado-Isern
Fermin Cantenys-Soler
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT83302288T priority Critical patent/ATE31202T1/en
Publication of EP0092987A1 publication Critical patent/EP0092987A1/en
Application granted granted Critical
Publication of EP0092987B1 publication Critical patent/EP0092987B1/en
Expired 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
    • F15B15/02—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

Definitions

  • the invention relates to an improved mechanism for driving turning shafts, the said mechanism being of the type that comprises a chamber within which a pair of opposite pistons are movable, the latter being provided with a toothed arm forming a gear with a turning shaft that crosses the said chamber, the walls of which are provided with several holes in order to allow the circulation of a fluid designed to alternatively hit against both the faces of the piston plates, with which the latter perform their stroke in one or other direction.
  • the shape of the said plates is such as to include several helicoidal springs in case that the fluid under pressure that acts the mechanism is supplied and evacuated from the center of the chamber.
  • the mechanism comprises a chamber 1 within which a pair of pistons are movable. These pistons are provided with respective plates 2 integral with which respective hollow arms 3 eccentrically protrude, a portion of the contour of same being adapted to that of the chamber, whereas one of their faces is toothed in order to form a gearing with the toothed surface 4 of the shaft 5, transversally mounted in the middle of the chamber 1.
  • the plates 2 are provided with projecting portions 6, which contour also partially adapts to that of the chamber, whereas when the piston plates reach the nearest position to each other, the said portions staggered engage with corresponding hollow portions formed in the said arms.
  • the hollow spaces of the arms 3, as well as the projecting portions 6, are reinforced by several equidistant vertically arranged walls 7.
  • several hollow spaces 8 are also formed in the opposite face of the piston plates, said spaces 8 being arranged for optative mounting of respective helicoidal springs.
  • This arrangement is specially devised for mechanisms of the described type in which the acting fluid is only received, as previously indicated, through a point placed in the middle of the chamber, but in case the mechanism is designed to receive the acting fluid upon both the piston faces, i. e. the inner and the outer ones (making it unnecessary the presence and action of said helicoidal sprin f s), then the hollow spaces 8 serve to reduce the weight of the pistons, in spite of the enlarged contour width of their plates.
  • the wall of the piston plates is provided with an enlarged slot 9 in order to include the end of the opposite toothed arm 3, with a substantial increasing in the length of the piston stroke within the chamber.

Abstract

A mechanism in which the length of the piston strokes as well as the width of the piston plates are substantially increased, whereas the weight of the whole decreases by virtue of the hollow structure of both the pistons, which is provided with vertical walls that in the rear face of the piston plates create a sort of cells for eventually mounting of respective helicoidal springs, whereas in the front face the said walls reinforce the toothed arm that forms a gear with the turning shaft driven by the mechanism, and a diametrically opposed projecting portion that when the piston plates reach the nearest position to each other, staggered engages with the corresponding hollow portion formed in the facing arm, the increasing in the length of the piston strokes being obtained by means of an enlarged slot formed in the front face of the piston plates adapted for including the end of the opposite toothed arm when de pistons reach the said position.

Description

  • The invention relates to an improved mechanism for driving turning shafts, the said mechanism being of the type that comprises a chamber within which a pair of opposite pistons are movable, the latter being provided with a toothed arm forming a gear with a turning shaft that crosses the said chamber, the walls of which are provided with several holes in order to allow the circulation of a fluid designed to alternatively hit against both the faces of the piston plates, with which the latter perform their stroke in one or other direction.
  • Up to the present it occurs that in mechanisms of the described type, in order that the chamber could be as smaller as possible, and at the same time the pistons could perform a stroke as long as possible, the plates of the latter had to have the smallest possible thickness. Although this condition involved an improvement in the length of the stroke, prejudicial vibrations have simultaneously appeared, in damage to the working and duration of the mechanism.
  • To avoid these disadvantages it has been proposed to widen the circular contour of the plates, but in such a manner that the thickness of their walls is smaller than that of the conventional ones, so that it results in a diminution of weight, and, in the other hand, the shape of the said plates is such as to include several helicoidal springs in case that the fluid under pressure that acts the mechanism is supplied and evacuated from the center of the chamber.
  • The following is a detailed description of an embodiment of the invention, reference being made to the accompanying drawings in which:
    • Figure 1 is a longitudinal section of the mechanism showing the piston plates in the nearest position to each other, and
    • Figure 2 is a cross section of the same mechanism in coincidence with the shaft designed to be driven by both the pistons.
  • The mechanism comprises a chamber 1 within which a pair of pistons are movable. These pistons are provided with respective plates 2 integral with which respective hollow arms 3 eccentrically protrude, a portion of the contour of same being adapted to that of the chamber, whereas one of their faces is toothed in order to form a gearing with the toothed surface 4 of the shaft 5, transversally mounted in the middle of the chamber 1.
  • Diametrically opposed to the arms 3, the plates 2 are provided with projecting portions 6, which contour also partially adapts to that of the chamber, whereas when the piston plates reach the nearest position to each other, the said portions staggered engage with corresponding hollow portions formed in the said arms.
  • The hollow spaces of the arms 3, as well as the projecting portions 6, are reinforced by several equidistant vertically arranged walls 7. On the other hand, several hollow spaces 8 are also formed in the opposite face of the piston plates, said spaces 8 being arranged for optative mounting of respective helicoidal springs. This arrangement is specially devised for mechanisms of the described type in which the acting fluid is only received, as previously indicated, through a point placed in the middle of the chamber, but in case the mechanism is designed to receive the acting fluid upon both the piston faces, i. e. the inner and the outer ones (making it unnecessary the presence and action of said helicoidal sprinfs), then the hollow spaces 8 serve to reduce the weight of the pistons, in spite of the enlarged contour width of their plates. It is to be pointed out that the wall of the piston plates is provided with an enlarged slot 9 in order to include the end of the opposite toothed arm 3, with a substantial increasing in the length of the piston stroke within the chamber.

Claims (1)

1. An improved mechanism for driving turning shafts, the said mechanism being of the type that comprises a pair of pistons which respective toothed arm, partially adapted to the inner contour of the enclosing chamber, forms a gear with the pinion of a crossing shaft laying in the chamber where the cited elements are mounted, characterised by the fact that each toothed arm, as well as a diametrically opposed portion that projects from the respective piston plate and is also partially adapted to the inner contour of the enclosing chamber, have a hollow structure reinforced by equidistantly distributed walls, the cited arms and projecting portions staggered engaging when the pistons reach the nearest position to each other, whereas on the opposite face of the piston plates several hollow spaces are opened for optative mounting of respective helicoidal springs, all this being arranged to reduce the weight of the pistons and, at the same time, to increase the width of the corresponding plates, being the wall of the latter provided with an enlarged slot in order to include the end of the respective opposite toothed arm in order to increase the length of the piston strokes.
EP83302288A 1982-04-24 1983-04-22 Rotary fluid pressure actuator Expired EP0092987B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83302288T ATE31202T1 (en) 1982-04-24 1983-04-22 PRESSURE OPERATED ROTARY ACTUATOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES1982264705U ES264705Y (en) 1982-04-24 1982-04-24 "IMPROVED ROTATING AXLE DRIVE MECHANISM".
ES264705 1982-04-24

Publications (2)

Publication Number Publication Date
EP0092987A1 true EP0092987A1 (en) 1983-11-02
EP0092987B1 EP0092987B1 (en) 1987-12-02

Family

ID=8420182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83302288A Expired EP0092987B1 (en) 1982-04-24 1983-04-22 Rotary fluid pressure actuator

Country Status (3)

Country Link
EP (1) EP0092987B1 (en)
AT (1) ATE31202T1 (en)
ES (1) ES264705Y (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0167497A1 (en) * 1984-07-06 1986-01-08 Aurelio Messina A semi-rotating single acting pneumatic actuator
GB2318616B (en) * 1996-10-14 1999-10-06 Smc Corp Rotary actuator
DE102018218311B3 (en) * 2018-10-26 2020-04-16 Festo Se & Co. Kg Fluid-operated rotary drive and rotary drive arrangement equipped with it

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB816143A (en) * 1955-09-01 1959-07-08 Sprague Devices Inc Improvements in fluid pressure motors
GB1285515A (en) * 1969-12-24 1972-08-16 Jean Gachot Improvements in or relating to actuators
US4167897A (en) * 1975-06-19 1979-09-18 Bunyard Alan D Rotary actuators
US4203351A (en) * 1978-02-14 1980-05-20 Griesel B.V. Fluid motor actuator for rotating a shaft back and forth
WO1980001096A1 (en) * 1978-11-24 1980-05-29 Wire Matic Regler Ab A pneumatic operating device
EP0040976A1 (en) * 1980-05-27 1981-12-02 Worcester Controls (U.K.) Limited Rotary actuators

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB816143A (en) * 1955-09-01 1959-07-08 Sprague Devices Inc Improvements in fluid pressure motors
GB1285515A (en) * 1969-12-24 1972-08-16 Jean Gachot Improvements in or relating to actuators
US4167897A (en) * 1975-06-19 1979-09-18 Bunyard Alan D Rotary actuators
US4203351A (en) * 1978-02-14 1980-05-20 Griesel B.V. Fluid motor actuator for rotating a shaft back and forth
WO1980001096A1 (en) * 1978-11-24 1980-05-29 Wire Matic Regler Ab A pneumatic operating device
EP0040976A1 (en) * 1980-05-27 1981-12-02 Worcester Controls (U.K.) Limited Rotary actuators

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0167497A1 (en) * 1984-07-06 1986-01-08 Aurelio Messina A semi-rotating single acting pneumatic actuator
GB2318616B (en) * 1996-10-14 1999-10-06 Smc Corp Rotary actuator
US6170797B1 (en) 1996-10-14 2001-01-09 Smc Corporation Rotary actuator
DE102018218311B3 (en) * 2018-10-26 2020-04-16 Festo Se & Co. Kg Fluid-operated rotary drive and rotary drive arrangement equipped with it

Also Published As

Publication number Publication date
EP0092987B1 (en) 1987-12-02
ES264705Y (en) 1983-05-16
ATE31202T1 (en) 1987-12-15
ES264705U (en) 1982-11-16

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