EP0043829A1 - Fluid-driven rotational device - Google Patents

Fluid-driven rotational device

Info

Publication number
EP0043829A1
EP0043829A1 EP81900294A EP81900294A EP0043829A1 EP 0043829 A1 EP0043829 A1 EP 0043829A1 EP 81900294 A EP81900294 A EP 81900294A EP 81900294 A EP81900294 A EP 81900294A EP 0043829 A1 EP0043829 A1 EP 0043829A1
Authority
EP
European Patent Office
Prior art keywords
plate
shaft
fluid
pressure chamber
rotational device
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Withdrawn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
EP81900294A
Other languages
German (de)
French (fr)
Inventor
Göran EGELIUS
Christer Ericson
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
Publication of EP0043829A1 publication Critical patent/EP0043829A1/en
Withdrawn legal-status Critical Current

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
    • F15B15/068—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 helical type

Definitions

  • the present invention relates to a fluid-driven rotational device having an outgoing turning shaft, mounted in a housing, a plate displaceable in the housing, a motion-translating mechanism between plate and turning shaft and a pressure chamber, at least on one side of the plate, connected to a pressure fluid source.
  • a means of the kind described is known, e.g. from DE-OS 1 939 158.
  • the motion-translating mechanism in this case comprises a lead screw rigidly adapted on the turning shaft and in mesh with a nut fixed to the plate.
  • the pressure chamber is defined and sealed by a metal bellows.
  • This rotational device is relatively complicated and is expensive to manufacture. Inparticular, the screw mechanism requires great machining accuracy, which increases production costs.
  • the metal bellows is another detail which is impractical and makes manufacture more expensive. Disclosure of Invention
  • the object of the invention is simply and cheaply to provide turning motion for pneumatic or hydraulic forces without great demands on machining accuracy, and to avoid the sealing problems occurring in enclosing air or other fluid in metal cylinders having sealed components.
  • the motion translating mechanism of the rotational device comprising a pin rigidly attached to the plate and a slot, axially twisted in relation to the shaft, accommodating the pin and extending through the torque shaft.
  • the pressure chamber is defined by a bellows.
  • a pressure chamber is arranged solely on one side of the plate, while a compression spring is arranged on the other side.
  • the rotational means includes a housing comprising two halves 1 and 2. There is a horizontal plate 3 in the housing, this plate being displace able upwards and downwards.
  • a turning shaft 6 extends through the plate and is journalled in the halves 1 and 2. In the shaft there is a through slot 5, which is axially twisted in relation the shaft, a pin 4 being accommodated in the slot 5 and rigidly attached to the plate 3.
  • the plate 3 is moved upwards and downwards with the aid of two bellows 7 and 8, which can be connected via nipples 13 to a pressurised fluid source, e.g. a compressed air source.
  • a pressurised fluid source e.g. a compressed air source.
  • the housing halves 1 and 2 are kept together with the aid of through-going, hollow tension members 9 and 10.
  • the material in the members is not ferromagnetic.
  • the tension members further function as holders and guards for different types of indication means 11.
  • one of the hollow members can carry a setable position limit indicator for controlling the motion of the rotational device.
  • one of the bellows 7, 8 can be exchanged for any suitable kind of compression spring arranged round the turning shaft.
  • the bellows can be made by immersing a block of foamed polymer in a solution of the elastomer of which the bellows is to consist, or by spraying the block with the elastomer in question.
  • the block is made to conform with the interior of one half of the housing, and is sufficiently soft and porous for it to remain in the bellows without disadvantageously affecting the ability of the latter to be compressed and to expand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Hydraulic Motors (AREA)
  • Diaphragms And Bellows (AREA)

Abstract

Dispositif rotatif entraine par un fluide comprenant un arbre tournant de sortie (6), tourillonne dans un boitier (1, 2) et une plaque (3) pouvant etre deplacee a l'interieur dudit boitier. Un mecanisme de translation de mouvement (4, 5) est prevu entre la plaque et l'arbre. Une chambre de pression connectee a une source de fluide sous pression est situee au moins sur un cote de la plaque. Le mecanisme de translation de mouvement comprend une cheville (4) fixee rigidement a la plaque (3) et logee dans une fente (5) tordue axialement s'etendant au travers de l'arbre (6).Rotary device driven by a fluid comprising a rotating output shaft (6), journalled in a case (1, 2) and a plate (3) which can be moved inside said case. A movement translation mechanism (4, 5) is provided between the plate and the shaft. A pressure chamber connected to a source of pressurized fluid is located at least on one side of the plate. The movement translation mechanism comprises a pin (4) rigidly fixed to the plate (3) and housed in a slot (5) twisted axially extending through the shaft (6).

Description

DESCRIPTION
Fluid-driven rotational device
Technical Field
The present invention relates to a fluid-driven rotational device having an outgoing turning shaft, mounted in a housing, a plate displaceable in the housing, a motion-translating mechanism between plate and turning shaft and a pressure chamber, at least on one side of the plate, connected to a pressure fluid source. Background Art
A means of the kind described is known, e.g. from DE-OS 1 939 158. The motion-translating mechanism in this case comprises a lead screw rigidly adapted on the turning shaft and in mesh with a nut fixed to the plate. The pressure chamber is defined and sealed by a metal bellows. This rotational device is relatively complicated and is expensive to manufacture. Inparticular, the screw mechanism requires great machining accuracy, which increases production costs. The metal bellows is another detail which is impractical and makes manufacture more expensive. Disclosure of Invention
The object of the invention is simply and cheaply to provide turning motion for pneumatic or hydraulic forces without great demands on machining accuracy, and to avoid the sealing problems occurring in enclosing air or other fluid in metal cylinders having sealed components.
This object is fulfilled by the motion translating mechanism of the rotational device according to the invention comprising a pin rigidly attached to the plate and a slot, axially twisted in relation to the shaft, accommodating the pin and extending through the torque shaft.
In a particularly suitable embodiment of the rotational means in accordance with the invention, the pressure chamber is defined by a bellows.
In another suitable embodiment of the inventive rotational device, a pressure chamber is arranged solely on one side of the plate, while a compression spring is arranged on the other side.
Brief Description of Drawing
One embodiment of the torque means in accordance with the invention is illustrated in a longitudinal section on the drawing. Best Mode of Carrying out the Invention
In the illustrated embodiment, the rotational means includes a housing comprising two halves 1 and 2. There is a horizontal plate 3 in the housing, this plate being displace able upwards and downwards. A turning shaft 6 extends through the plate and is journalled in the halves 1 and 2. In the shaft there is a through slot 5, which is axially twisted in relation the shaft, a pin 4 being accommodated in the slot 5 and rigidly attached to the plate 3.
The plate 3 is moved upwards and downwards with the aid of two bellows 7 and 8, which can be connected via nipples 13 to a pressurised fluid source, e.g. a compressed air source. The housing halves 1 and 2 are kept together with the aid of through-going, hollow tension members 9 and 10. The material in the members is not ferromagnetic. The tension members further function as holders and guards for different types of indication means 11. For example one of the hollow members can carry a setable position limit indicator for controlling the motion of the rotational device.
Por obtaining an automatic return motion on pressure failure in the fluid system one of the bellows 7, 8 can be exchanged for any suitable kind of compression spring arranged round the turning shaft. To simplify manufacture, instead of being moulded conventionally between a core and mould, the bellows can be made by immersing a block of foamed polymer in a solution of the elastomer of which the bellows is to consist, or by spraying the block with the elastomer in question. The block is made to conform with the interior of one half of the housing, and is sufficiently soft and porous for it to remain in the bellows without disadvantageously affecting the ability of the latter to be compressed and to expand.

Claims

1. A fluid-driven rotational device having an outgoing turning shaft (6) journalled in a housing (1, 2), a plate (3) displaceable in the housing, a motion-translating mechanism (4, 5) between the plate and the shaft and a pressure chamber, at least on one side of the plate, connected to a pressurised fluid source, characterized in that the mechanism comprises a pin (4) rigidly connected to the plate (3) and accommodated in an axially twisted slot (5) extending through the shaft (6).
2. Device as claimed in claim 1, characterized in that the pressure chamber is defined by a bellows (7, 8).
3. Device as claimed in claim.1 or 2, characterized in that a pressure chamber is arranged solely on one side of the plate (3) and that a pressure spring is arranged on the other side of said plate.
EP81900294A 1980-01-25 1981-01-23 Fluid-driven rotational device Withdrawn EP0043829A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8000592 1980-01-25
SE8000592A SE428146B (en) 1980-01-25 1980-01-25 FLUID DRIVED VRIDDON WITH A TRANSMISSION TRANSMISSION MECHANISM BETWEEN A PLATE AND OUTLET VRIDAX

Publications (1)

Publication Number Publication Date
EP0043829A1 true EP0043829A1 (en) 1982-01-20

Family

ID=20340065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81900294A Withdrawn EP0043829A1 (en) 1980-01-25 1981-01-23 Fluid-driven rotational device

Country Status (7)

Country Link
EP (1) EP0043829A1 (en)
JP (1) JPS57500163A (en)
BR (1) BR8106186A (en)
DK (1) DK422481A (en)
NO (1) NO813241L (en)
SE (1) SE428146B (en)
WO (1) WO1981002186A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1118695A (en) * 1993-12-03 1995-06-19 Robert Dennison A semi-trailer command steering system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI43419B (en) * 1969-03-29 1970-11-30 T Halonen
DE1939158A1 (en) * 1969-08-01 1971-02-11 Woelfel Dipl Ing Peter Rotating cylinder
DE2121084A1 (en) * 1971-04-29 1972-11-09 Eckart, Rudolf, 6491 Wallroth Pressure fluid operated swivel motor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8102186A1 *

Also Published As

Publication number Publication date
SE428146B (en) 1983-06-06
SE8000592L (en) 1981-07-26
NO813241L (en) 1981-09-23
WO1981002186A1 (en) 1981-08-06
BR8106186A (en) 1981-11-17
JPS57500163A (en) 1982-01-28
DK422481A (en) 1981-09-24

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH DE FR GB NL

17P Request for examination filed

Effective date: 19820122

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19831012