EP0258195A1 - Device in pneumatic cylinderpiston arrangements - Google Patents

Device in pneumatic cylinderpiston arrangements Download PDF

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Publication number
EP0258195A1
EP0258195A1 EP87850235A EP87850235A EP0258195A1 EP 0258195 A1 EP0258195 A1 EP 0258195A1 EP 87850235 A EP87850235 A EP 87850235A EP 87850235 A EP87850235 A EP 87850235A EP 0258195 A1 EP0258195 A1 EP 0258195A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
carrier
piston
roller
rollers
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Withdrawn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
EP87850235A
Other languages
German (de)
French (fr)
Inventor
Bo Granbom
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 EP0258195A1 publication Critical patent/EP0258195A1/en
Withdrawn legal-status Critical Current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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/082—Characterised by the construction of the motor unit the motor being of the slotted cylinder type

Definitions

  • This invention relates to a device in pneumatic cylin­der-piston arrangements in accordance with the introductory portion of claim 1.
  • FIG. 1 designates a cylinder with a cylinder barrel.
  • 2 designates a carrier fastened to a piston running in the barrel of the cylinder 1.
  • the throat portion connecting the carrier 2 with the piston is running in a slot 3 made along the cylinder 1 and covered by a flexible strip 4.
  • This cylinder-piston arrangement is previously known per se and will therefore not be described here more in detail.
  • a breaking roller 5 and 6 is arranged at each end of the cylinder 1.
  • the respective break­ing roller 5 and 6 can be mounted about shafts directly at­tached to the respective end of the cylinder and, thus, sup­ported by the cylinder 1.
  • a flexible endless means in the form of a toothed belt 7 is running over the breaking rollers 5 and 6.
  • two tensioning rollers 8 are arranged, by means of which the tension of the toothed belt 7 can be adjusted.
  • the carrier 2 is fixedly connected to the toothed belt 7 by means of a yoke member 9 or the like, for example screwed to this (indicated at 10). Screws for fasten­ing the yoke member 9 to the carrier 2 are indicated by 11.
  • the breaking roller 5 is further provided with a braking means, for example a magnetic brake 12, by means of which it is possible to brake the roller 5 to stop and consequently also the toothed belt 7.
  • the braking order also adjusts the supply of pressure fluid - compressed air - in such a way that the air supply to the cylinder is also stopped in braking. It is to be understood by this that it is possible to position the carrier 2 anywhere along the cylinder 1 and to lock this in this position.
  • the construction of the magnetic brake as well as its operation by means of electric order signals also actuating the supply of pressure fluid is professional solu­tions and is not intended to be included as a part of the in­vention.
  • the breaking roller 5 can be provided with a detecting element in the form of for example a pulse counter 13, by means of which it is possible to sense the position of the carrier 2 along the cylinder 1. In this way one can deter­mine exactly in advance where the carrier is to stop along the cylinder due to the braking of the roller 5, and it is also possible to introduce automatic control means for the motion of the carrier along the cylinder.
  • the pulse counter is a de­vice known per se and is no part of the invention, either, and therefore a more detailed description of the pulse counter is unnecessary. Instead of the pulse counter for instance a mag­netic tape extending along the cylinder, one or more photo­cells, microswitches etc. can be used as detecting element.
  • breaking rollers 5 and 6 need not be fastened to the cylinder but can of course be attached to other places in the vicinity of the cylinder.
  • break­ing rollers and toothed belt can be built into a casing or rail or be fastened to the cylinder.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

A device in pneumatic cylinder-piston arrangements, especially of the type where a piston without rod is running in a cylinder (1) and has a carrier (2) extending through a longitudinal slot (3) in the cylinder. A flexible endless means (7) is arranged to extend at least with one part in parallel with the cylinder (1), the carrier (2) of the piston being anchored (9, 10) to this part.

Description

  • This invention relates to a device in pneumatic cylin­der-piston arrangements in accordance with the introductory portion of claim 1.
  • It is publicly known that the piston in pneumatic cylin­der-piston arangements usually operates between the two outer positions. There are great difficulties in stopping and lock­ing the piston in intermediate positions.
  • Especially at pneumatic cylinder-piston arrangements of the type where a piston without rod is running in a cylinder and is provided with a carrier extending through a longitudi­nal slot in the cylinder it has been found to be advantageous to be able to stop the carrier in one or more positions along the cylinder.
  • However, this is now possible by means of the charac­teristic features of the invention defined in the claims, si­multaneously as the invention enables a simple conversion of linear motion into rotary motion which is a combination of a very great interest in many cases.
  • The invention will be described in greater detail in the form of an example with reference to drawing, wherein
    • Fig. 1 is a schematic side view of the invention,
    • Fig. 2 is a partial top plan view of the device in Fig. 1 and
    • Fig. 3 is a schematic section of the device.
  • In the figures 1 designates a cylinder with a cylinder barrel. 2 designates a carrier fastened to a piston running in the barrel of the cylinder 1. The throat portion connecting the carrier 2 with the piston is running in a slot 3 made along the cylinder 1 and covered by a flexible strip 4. This cylinder-piston arrangement is previously known per se and will therefore not be described here more in detail.
  • According to the invention a breaking roller 5 and 6 is arranged at each end of the cylinder 1. The respective break­ing roller 5 and 6 can be mounted about shafts directly at­tached to the respective end of the cylinder and, thus, sup­ported by the cylinder 1. A flexible endless means in the form of a toothed belt 7 is running over the breaking rollers 5 and 6. Further, in the example shown two tensioning rollers 8 are arranged, by means of which the tension of the toothed belt 7 can be adjusted. The carrier 2 is fixedly connected to the toothed belt 7 by means of a yoke member 9 or the like, for example screwed to this (indicated at 10). Screws for fasten­ing the yoke member 9 to the carrier 2 are indicated by 11.
  • The breaking roller 5 is further provided with a braking means, for example a magnetic brake 12, by means of which it is possible to brake the roller 5 to stop and consequently also the toothed belt 7. The braking order also adjusts the supply of pressure fluid - compressed air - in such a way that the air supply to the cylinder is also stopped in braking. It is to be understood by this that it is possible to position the carrier 2 anywhere along the cylinder 1 and to lock this in this position. The construction of the magnetic brake as well as its operation by means of electric order signals also actuating the supply of pressure fluid is professional solu­tions and is not intended to be included as a part of the in­vention.
  • Moreover, the breaking roller 5 can be provided with a detecting element in the form of for example a pulse counter 13, by means of which it is possible to sense the position of the carrier 2 along the cylinder 1. In this way one can deter­mine exactly in advance where the carrier is to stop along the cylinder due to the braking of the roller 5, and it is also possible to introduce automatic control means for the motion of the carrier along the cylinder. The pulse counter is a de­vice known per se and is no part of the invention, either, and therefore a more detailed description of the pulse counter is unnecessary. Instead of the pulse counter for instance a mag­netic tape extending along the cylinder, one or more photo­cells, microswitches etc. can be used as detecting element.
  • Of course it is possible within the scope of the inven­tion to vary this in respect of the position and number of the breaking rollers and to replace the toothed belt with a chain or the like. Thus, the breaking rollers 5 and 6 need not be fastened to the cylinder but can of course be attached to other places in the vicinity of the cylinder. Of course break­ing rollers and toothed belt can be built into a casing or rail or be fastened to the cylinder. In many cases it has been found to be suitable to provide the other roller, also, i.e. the roller 6, with a braking means and to brake both the rol­lers 5 and 6 at the same time when positioning the carrier 2.
  • Accordingly it is possible by means of the invention de­scribed above to position the carrier exactly along the cylin­der. By means of a computer it is feasible to program in ad­vance a movement pattern of the carrier. Furthermore, the in­vention gives a possibility of converting the linear motion of the piston in the cylinder to a rotary motion which can be utilized at one or both the breaking rollers.

Claims (8)

1. A device in pneumatic cylinder-piston arrangements, especially of the type where a piston without rod is running in a cylinder (1) and has a carrier (2) extending through a longitudinal slot (3) in the cylinder, charact­erized in that a flexible endless means (7) is arranged to extend at least with one part in parallel with the cylinder (1) and that the carrier (2) of the piston is anchored (9, 10) to this part.
2. The device of claim 1, characterized in that the means (7) consists of a toothed belt, chain or the like and is guided over a breaking roller (5, 6) located at each end of the cylinder (1).
3. The device of claim 2, characterized in that the breaking rollers (5, 6) are mounted rotatably at the ends of the cylinder (1), respectively.
4. The device of claim 2 or 3, character­ized in that at least one of the rollers (5) is provided with a braking means (12), an order for braking the roller (5) and the means (7) also stopping the supply of fluid to the cylinder (1).
5. The device of claim 4, characterized in that the braking means is a magnetic brake (12).
6. The device of any one of claims 1-5, char­acterized in that a detecting element is arranged to sense the position of the carrier (2) or the endless means (7) along the cylinder (1).
7. The device of claim 6, characterized in that one of the rollers (5) is connected with the detecting element (13), by means of which the position of the carrier (2) can be determined in dependence on the rotational turns of the roller (5).
8. The device of claim 7, characterized in that the detecting element is a pulse counter (13).
EP87850235A 1986-08-21 1987-07-23 Device in pneumatic cylinderpiston arrangements Withdrawn EP0258195A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8603532A SE454288B (en) 1986-08-21 1986-08-21 DEVICE FOR PNEUMATIC CYLINDER PISTON DEVICES
SE8603532 1986-08-21

Publications (1)

Publication Number Publication Date
EP0258195A1 true EP0258195A1 (en) 1988-03-02

Family

ID=20365369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87850235A Withdrawn EP0258195A1 (en) 1986-08-21 1987-07-23 Device in pneumatic cylinderpiston arrangements

Country Status (3)

Country Link
EP (1) EP0258195A1 (en)
JP (1) JPS6353303A (en)
SE (1) SE454288B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3822103A1 (en) * 1988-06-30 1990-02-08 Winkler Duennebier Kg Masch DEVICE FOR MOVING PARTS
US6336393B1 (en) 1998-07-01 2002-01-08 Parker-Hannifin Corporation Rodless pneumatic cylinder

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3949620A (en) * 1974-10-04 1976-04-13 The Raymond Lee Organization, Inc. Cable cylinder device
EP0016840A1 (en) * 1978-06-27 1980-10-15 SUGAWA, Hiroshi Multipurpose actuator
EP0103852A1 (en) * 1982-09-20 1984-03-28 IMI Norgren AG Rectilinear command
EP0136435A1 (en) * 1983-08-05 1985-04-10 Robert Bosch Gmbh Working cylinder with braking device
EP0181415A1 (en) * 1983-05-10 1986-05-21 Knorr-Bremse Ag Positioning device for a rodless actuator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3949620A (en) * 1974-10-04 1976-04-13 The Raymond Lee Organization, Inc. Cable cylinder device
EP0016840A1 (en) * 1978-06-27 1980-10-15 SUGAWA, Hiroshi Multipurpose actuator
EP0103852A1 (en) * 1982-09-20 1984-03-28 IMI Norgren AG Rectilinear command
EP0181415A1 (en) * 1983-05-10 1986-05-21 Knorr-Bremse Ag Positioning device for a rodless actuator
EP0136435A1 (en) * 1983-08-05 1985-04-10 Robert Bosch Gmbh Working cylinder with braking device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3822103A1 (en) * 1988-06-30 1990-02-08 Winkler Duennebier Kg Masch DEVICE FOR MOVING PARTS
US6336393B1 (en) 1998-07-01 2002-01-08 Parker-Hannifin Corporation Rodless pneumatic cylinder

Also Published As

Publication number Publication date
SE454288B (en) 1988-04-18
JPS6353303A (en) 1988-03-07
SE8603532D0 (en) 1986-08-21
SE8603532L (en) 1988-02-22

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