WO1983002135A1 - Fluid drive means for a linear reciprocating motion - Google Patents

Fluid drive means for a linear reciprocating motion Download PDF

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Publication number
WO1983002135A1
WO1983002135A1 PCT/SE1982/000414 SE8200414W WO8302135A1 WO 1983002135 A1 WO1983002135 A1 WO 1983002135A1 SE 8200414 W SE8200414 W SE 8200414W WO 8302135 A1 WO8302135 A1 WO 8302135A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive means
membrane
rod
fluid
elements
Prior art date
Application number
PCT/SE1982/000414
Other languages
French (fr)
Inventor
Goeran Egelius
Christer Ericson
Original Assignee
EGELIUS, Göran
Christer Ericson
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 EGELIUS, Göran, Christer Ericson filed Critical EGELIUS, Göran
Priority to JP83500071A priority Critical patent/JPS58502160A/en
Priority to GB08320007A priority patent/GB2123088B/en
Priority to DE823249254T priority patent/DE3249254T1/en
Publication of WO1983002135A1 publication Critical patent/WO1983002135A1/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
    • F15B15/08—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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J3/00—Diaphragms; Bellows; Bellows pistons
    • F16J3/06—Bellows pistons

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Actuator (AREA)
  • Diaphragms And Bellows (AREA)
  • Combined Devices Of Dampers And Springs (AREA)

Abstract

A fluid drive means for a linear reciprocating motion is provided with at least one flexible and collapsible member (15) arranged between elements (11, 12, 14) which move in relation to each other during operation. The member (15) surrounds between said elements (11, 12, 14) a central rod (13), which extends through one of the elements (11, 12). Together with the rod the member (15) completely delimits a fluid chamber for the pressure fluid which is required for the operation of the drive means. The member (15), which is made for instance of an elastomer, consists of a roll-membrane and establishes a sealing (19) around the rod (13).

Description

DESCRIPTION
Fluid Drive Means For A Linear Reciprocating Motion
The present invention concerns a hydraulic or pneumatic fluid drive means for a linear reciprocating motion. It is provided with at least one flexible and collapsible member arranged between elements which move in relation to each other during operation. The chief field of application for such a drive means is as a servo-motor.
A drive means of the above mentioned kind is known for instance through the Swedish layout print No. 7305870-3. There the collapsible member is a bellows which is provided only on the side of the shaft or rod opposite the element or piston in question. Generally such a single-acting drive means is unsuitable as a servo-motor, and the bellows is complicated and expansive to manufacture. Further it is impossible to make it double-acting with a pressure-member on the other side of the piston. The US Patent No. 2 465 560 suggests a solution of the sealing problems in a double- acting piston-cylinder-assembly by means of rubber containers or bags in the cylinder chambers.
The object of the invention is to produce in a simple way a linear reciprocating motion from pneumatic or hydraulic forces without high demands for machinery accuracy and without the sealing problems that arise when air or another fluid is enclosed in metal cylinders with sealed components. With other words, a cheaper and simpler alternative to conventional piston-cylinder- assemblies for carrying out control movements is intended. According to the invention this problem is solved in that the rod in the fluid drive means together with said member completely delimit a fluid chamber for the pressure fluid which is required for the operation of the drive means and in that said member, which is made for instance of an elastomer, consists of a roll- membrane and establishes a sealing against the rod, for instance a lip sealing.
The invention will now be closer described with reference to the accompaniήgdrawing which in an axial section shows an embodiment of the fluid drive means according to the invention.
In the shown embodiment the fluid drive means comprises a housing or cylinder 10 with end walls 11 , 12. In the end walls an output rod 13 is moiin ed for linear movement. The rod 13 carries a pressure plate 14 between the end walls 11, 12. On each side of the pressure plate 14 a pressure chamber is delimited by a membrane 15 r preferably of rubber, and by the rod 13. In each end wall a connection 16 for pressure fluid is provided.
At the pressure plate 14 the membrane 15 is statically sealed against the rod 13. A ring may for instance press a flange 19 of the membrane against the rod 13. At the end walls the membrane 15 is dynamically sealed against the rod 13 by means of a conventional sealing 20, for instance a lip sealing, made in one piece with the membrane 15. Of manufacturing and assembling reasons the side 21 of the membrane bearing on the end walls 11 and 12 respectively is manufactured separately and connected to the main part of the membrane.
When pressure fluid is removed from the pressure chamber on one side and led to the pressure chamber on the other side so that the pressure plate 14. and with' that the rod 13 moves in one direction the membrane 15 is collapsed in such a way that it rolls up like a roll membrane with one layer outside the other. In order to control this movement a part 22 of the membrane nearest the pressure plate 14 has been made thicker. In that way an indication of bending comes up where this part 22 ends. If for instance this part 22 is made a little longer than a third of the axial length of the membrane the latter will form three layers when it is collapsed.
O

Claims

1. A fluid drive means for a linear reciprocating motion and provided with at least one flexible and collapsible member (15) arranged between elements (11, 12, 14) which move in relation to each other during operation, said member (15) between said elements (11, 12, 14) surrounding a central rod (13) which extends through one of the elements (11, 12), characterized in that said rod (13) together with said member (15) completely delimits a fluid chamber for the pressure fluid which is required for the operation of the drive means and in that said member (15), which is made for instance of an elastomer, consists of a roll membrane and establishes a sealing (19) around the rod (13), for instance a lip sealing.
2. A fluid drive means according to claim 1, characterized in that the roll membrane (15) is made thicker at one end, so that an indication of bending for the collapse of the membrane comes up where the thicker part (22) changes over to normal wall-thick- ness.
3. A fluid drive means according to claim 2, characterized in that said thicker part- (22) extends through a little more than a third of the axial length of the membrane (15) so that the membrane (15) will form three layers when it is collapsed.
4. A fluid drive means according to any of claims 1 - 3, characterized in that such a member (15) is provided on each side of a plate (14) secured to said rod (13), which plate (14) together with end walls (11, 12) of a cylinder (10) for each member form a pair of said elements, fluid connections (10) being provided in the end walls (11, 12).
PCT/SE1982/000414 1981-12-08 1982-12-03 Fluid drive means for a linear reciprocating motion WO1983002135A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP83500071A JPS58502160A (en) 1981-12-08 1982-12-03 Fluid drive device for linear reciprocating motion
GB08320007A GB2123088B (en) 1981-12-08 1982-12-03 Fluid drive means for a linear reciprocating motion
DE823249254T DE3249254T1 (en) 1981-12-08 1982-12-03 FLUID DRIVING DEVICE FOR A LINEAR TOOLING MOTION

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8107338-9811208 1981-12-08
SE8107338A SE428235B (en) 1981-12-08 1981-12-08 FLUIDIC ENGINE FOR LINES ALTERNATIVE MOVEMENT WITH AT LEAST ONE BUILDING, HOPPABLE BODY

Publications (1)

Publication Number Publication Date
WO1983002135A1 true WO1983002135A1 (en) 1983-06-23

Family

ID=20345223

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1982/000414 WO1983002135A1 (en) 1981-12-08 1982-12-03 Fluid drive means for a linear reciprocating motion

Country Status (9)

Country Link
JP (1) JPS58502160A (en)
CA (1) CA1206840A (en)
DE (1) DE3249254T1 (en)
ES (1) ES518005A0 (en)
FR (1) FR2517762B1 (en)
GB (1) GB2123088B (en)
IT (2) IT1157130B (en)
SE (1) SE428235B (en)
WO (1) WO1983002135A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3523717A1 (en) * 1985-07-03 1987-01-15 Daimler Berthold H Dr Expansion cylinder of elastically variable length

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4208266C2 (en) * 1992-03-14 1994-02-10 Daimler Benz Ag Membrane with a bottom, especially for an actuator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465560A (en) * 1943-12-24 1949-03-29 Hans G Warnke Leakproof cylinder
US3014460A (en) * 1959-03-23 1961-12-26 Glenn T Randol Pneumatically-actuated booster for vehicular steering systems
DE2751430A1 (en) * 1977-11-17 1979-05-23 Gerd W Dr Ing Seifert Fluid pressure operated power actuator - has guide mechanisms between reversible membrane piston and housing acting with piston rods
DE2907581A1 (en) * 1978-03-02 1979-09-06 Honeywell Inc Membrane seal for pneumatic cylinder - has connecting plate with air feed nozzle inserted into cylinder bore

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB782267A (en) * 1954-05-07 1957-09-04 Roche Products Ltd A process for the manufacture of pyrophosphoric and phosphonic acid derivatives
US3051143A (en) * 1961-04-19 1962-08-28 Michael J Nee Actuator
FR1491446A (en) * 1966-06-28 1967-08-11 Simca Automobiles Sa Sealing device for hydraulic cylinder
DE2637803A1 (en) * 1976-08-21 1978-02-23 Festo Maschf Stoll G WORKING CYLINDERS FOR PNEUMATIC OR HYDRAULIC PRESSURE MEDIA
US4208060A (en) * 1979-01-15 1980-06-17 Bellofram Corporation Sealed shaft
US4295653A (en) * 1980-04-07 1981-10-20 Zero-Seal, Inc. Pressure-compensated diaphragm seals for actuators, with self-equalization

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465560A (en) * 1943-12-24 1949-03-29 Hans G Warnke Leakproof cylinder
US3014460A (en) * 1959-03-23 1961-12-26 Glenn T Randol Pneumatically-actuated booster for vehicular steering systems
DE2751430A1 (en) * 1977-11-17 1979-05-23 Gerd W Dr Ing Seifert Fluid pressure operated power actuator - has guide mechanisms between reversible membrane piston and housing acting with piston rods
DE2907581A1 (en) * 1978-03-02 1979-09-06 Honeywell Inc Membrane seal for pneumatic cylinder - has connecting plate with air feed nozzle inserted into cylinder bore

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3523717A1 (en) * 1985-07-03 1987-01-15 Daimler Berthold H Dr Expansion cylinder of elastically variable length

Also Published As

Publication number Publication date
IT8254040V0 (en) 1982-12-09
GB2123088A (en) 1984-01-25
ES8401197A1 (en) 1983-11-16
DE3249254T1 (en) 1983-12-01
CA1206840A (en) 1986-07-02
ES518005A0 (en) 1983-11-16
GB2123088B (en) 1985-07-10
GB8320007D0 (en) 1983-08-24
SE8107338L (en) 1983-06-09
FR2517762B1 (en) 1985-06-28
FR2517762A1 (en) 1983-06-10
IT1157130B (en) 1987-02-11
JPS58502160A (en) 1983-12-15
IT8268441A0 (en) 1982-12-09
SE428235B (en) 1983-06-13

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