EP0092987A1 - Rotary fluid pressure actuator - Google Patents
Rotary fluid pressure actuator Download PDFInfo
- 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
Links
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
- F15B15/02—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.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Vehicle Body Suspensions (AREA)
- Friction Gearing (AREA)
Abstract
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 respectivehollow 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 theshaft 5, transversally mounted in the middle of the chamber 1. - Diametrically opposed to the
arms 3, theplates 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 arrangedwalls 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 enlargedslot 9 in order to include the end of the oppositetoothed arm 3, with a substantial increasing in the length of the piston stroke within the chamber.
Claims (1)
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)
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)
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 |
-
1982
- 1982-04-24 ES ES1982264705U patent/ES264705Y/en not_active Expired
-
1983
- 1983-04-22 AT AT83302288T patent/ATE31202T1/en not_active IP Right Cessation
- 1983-04-22 EP EP83302288A patent/EP0092987B1/en not_active Expired
Patent Citations (6)
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)
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 |
---|---|
ATE31202T1 (en) | 1987-12-15 |
EP0092987B1 (en) | 1987-12-02 |
ES264705Y (en) | 1983-05-16 |
ES264705U (en) | 1982-11-16 |
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