EP0159299A1 - Cylindre hydraulique pour ascenseur - Google Patents

Cylindre hydraulique pour ascenseur Download PDF

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Publication number
EP0159299A1
EP0159299A1 EP85850097A EP85850097A EP0159299A1 EP 0159299 A1 EP0159299 A1 EP 0159299A1 EP 85850097 A EP85850097 A EP 85850097A EP 85850097 A EP85850097 A EP 85850097A EP 0159299 A1 EP0159299 A1 EP 0159299A1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
piston rod
damping
cylinder section
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Withdrawn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
EP85850097A
Other languages
German (de)
English (en)
Inventor
Per Göran Larsson
Jan Allan Krister Gustafsson
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.)
Stromsholmens Mekaniska Verkstad AB
Original Assignee
Electrolux AB
Stromsholmens Mekaniska Verkstad AB
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 Electrolux AB, Stromsholmens Mekaniska Verkstad AB filed Critical Electrolux AB
Publication of EP0159299A1 publication Critical patent/EP0159299A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/04—Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically
    • 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
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type

Definitions

  • This invention relates to a hydraulic device for operating an elevator.
  • the single-acting cylinders cannot be delivered assembled from the factory but have to be joined in situ. Even if the cylinders are joined with great accuracy the life of the sealings for the piston will be shortened because the sealings will pass a break in the chrome layer of the cylinders.
  • the double-acting telescopic cylinder is so designed that the different stages move simultaneously so that the oil at the piston rod side of the lowest telescopic stage will feed the next stage and so on. This makes the complete cylinder large and expensive to manufacture.
  • the object of this invention is to provide a cylinder which can replace the two last-mentioned cylinder types and which is simple to transport, instal and assemble. This is achieved by a device having the characteristics defined in the following claims.
  • Fig. 1 is a vertical section through a cylinder according to the invention and Fig. 2 more in detail shows a section through a modified cylinder.
  • the elevator cylinder which is denoted by 10 comprises several cylinder sections 11, 12, 13 each one having a piston rod 14, 15, 16 the lower end of each rod being designed as a guide 17, 18, 19.
  • the piston rod 14 as well as the piston rod 15 is provided with a channel in which oil flows from the cylinder section 11 to the cylinder section 12 and further to the cylinder section 13.
  • the piston rod of the cylinder section 11 In its upper end the piston rod of the cylinder section 11 has a thread or a conical part by means of which it can be connected and locked to an opening of corresponding form in the bottom of the cylinder section 12.
  • the lower part of the cylinder section 11 is connected via a hose 20 to an oil pump 21 by means of which oil can be pumped into the cylinder section 11.
  • the piston rod 15 runs in the cylinder section 12 and is connected to the lower part of the cylinder section 13.
  • the channel in the piston rod 16 is provided with a plug 22 sealing against the environment.
  • the upper part of the piston rod 16 is connected to an elevator cage, not shown, for instance by a wire.
  • a spring 23 is attached between the guides 18, 19 of the piston rods 15, 16 and the respective cylinder section 12 and 13 .
  • This spring successively transmits the force from the piston rod to the cylinder when the piston rod approaches its extended position, and this causes a continuous movement of the elevator as the different cylinder sections are activated.
  • the spring can be replaced by other elements having a corresponding function, for instance hydraulic end position dampers. It is also possible to use restrictions in the guide 18 and 19, respectively, to control the flow of oil between the upper and the lower side of the guide.
  • a spring 24 acting as a damper when the piston rods return to their retracted positions.
  • the cylinder comprises cylinder sections 25 and 26 each having a cylinder casing 27 and 28, respectively, and pistons 29 and 30, respectively.
  • the cylinder section 25 has a bottom 31 with an inlet 32 for oil.
  • the cylinder casing 27 of the cylinder section 25 is sealed from the bottom 31 by means of a sealing 33 and fastened to the bottom by means of a flange 34 and bolts 35.
  • the pistons 29 and 30, respectively are sleeve-shaped, each one being secured to a tubular piston rod 36 and 37, respectively, and having several sealings 38 and annular supports 39.
  • each piston rod 36, 37 and a part of the bottom 31 have a slightly conical portion 40 which together with a surface 41 on the piston 34, 35 forms a damping unit.
  • the outer end of each piston rod 36 and 37 has a groove 42 into which a part 43 of a fastening means 44 for the cylinder casing 28 is attached by means of a bolt connection 45.
  • This fastening means is sealed by means of sealings 46 both from the cylinder casing 28 and from the piston rod 36.
  • a tubular damping piston 47 is placed between each cylinder casing 27 and 28 and the corresponding piston rod 36 and 37, respectively.
  • the damping piston 47 moves freely between a shoulder 48 on each piston rod 36 and 37 and that side of the piston 29 and 30, respectively, which is opposite the damping piston, and the damping piston is provided with sealings 49 and strippers 50.
  • the space 51 formed between the damping piston 47 and the piston 29 and 30, respectively, communicates via a channel 52 with the interior of each tubular piston rod 36 and 37 so that oil can flow freely between these spaces.
  • the channel thus serves as a restriction for the oil.
  • each cylinder casing 27 and 28 has interiorly a stop plate 55 which is fixed to the casing and keeps the damping piston 47 and the piston rod in the cylinder.
  • Oil supplied via the inlet 32 will flow in between the bottom 31 and the piston 29 and between the piston rod 36 and the piston 30, the pistons 29, 30 with the piston rods 36, 37 moving to the left in the Figure. Simultaneously, the pressure of the oil in the space 51 will increase so that the damping pistons 47 will be pressed to the shoulders 48 and be moved at the same time as the piston rods 36, 37.
  • the damping piston will be moved to the right relative to the piston rod so that the space 51 is reduced whereby the oil flows through the channel 52 at the same time as the piston rod 37 is retarded. This retardation decreases during the end of the movement because of the shape of the surfaces 53 and 54 and ceases entirely when the damping piston 47 meets the piston 30, i.e. when the piston rod 37 has reached its outer end position.
  • the elevator cylinder comprises several cylinder sections which can be delivered separated from each other to the place of installation it is possible in a simple manner to take the cylinder sections into the hoist shaft and assemble them into an elevator cylinder of the desired length. Moreover, each piston rod during delivery will be protected in its cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Types And Forms Of Lifts (AREA)
  • Actuator (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Fluid-Pressure Circuits (AREA)
EP85850097A 1984-03-21 1985-03-20 Cylindre hydraulique pour ascenseur Withdrawn EP0159299A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8401565 1984-03-21
SE8401565A SE8401565L (sv) 1984-03-21 1984-03-21 Hydraulisk cylinder for en hiss

Publications (1)

Publication Number Publication Date
EP0159299A1 true EP0159299A1 (fr) 1985-10-23

Family

ID=20355228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85850097A Withdrawn EP0159299A1 (fr) 1984-03-21 1985-03-20 Cylindre hydraulique pour ascenseur

Country Status (5)

Country Link
EP (1) EP0159299A1 (fr)
DK (1) DK128885A (fr)
FI (1) FI851117L (fr)
NO (1) NO851119L (fr)
SE (1) SE8401565L (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1507941A1 (fr) * 2002-05-29 2005-02-23 Ez Indus Co., Ltd. Dispositif servant a faire monter et descendre un monte-charge utilise dans un entrepot en forme de tour
GB2446441A (en) * 2007-02-06 2008-08-13 Goodrich Actuation Systems Ltd Dual cylinder Actuator Arrangement for aeroengine nozzle and reverser

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2116658A1 (de) * 1970-04-09 1971-11-04 Pers En Constructiebedrijf Pre Hydraulisches oder pneumatisches Hebe system, insbesondere für einen Aufzug
US3968860A (en) * 1974-10-25 1976-07-13 Dover Corporation Hydraulic elevator installation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2116658A1 (de) * 1970-04-09 1971-11-04 Pers En Constructiebedrijf Pre Hydraulisches oder pneumatisches Hebe system, insbesondere für einen Aufzug
US3968860A (en) * 1974-10-25 1976-07-13 Dover Corporation Hydraulic elevator installation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ENGINEERS DIGEST, vol. 29, no. 5, May 1968, page 9, London, GB; "Long-travel, high-speed electro-hydraulic passenger-lifts" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1507941A1 (fr) * 2002-05-29 2005-02-23 Ez Indus Co., Ltd. Dispositif servant a faire monter et descendre un monte-charge utilise dans un entrepot en forme de tour
EP1507941A4 (fr) * 2002-05-29 2009-01-14 Ez Indus Co Ltd Dispositif servant a faire monter et descendre un monte-charge utilise dans un entrepot en forme de tour
GB2446441A (en) * 2007-02-06 2008-08-13 Goodrich Actuation Systems Ltd Dual cylinder Actuator Arrangement for aeroengine nozzle and reverser

Also Published As

Publication number Publication date
SE8401565L (sv) 1985-09-22
FI851117L (fi) 1985-09-22
SE8401565D0 (sv) 1984-03-21
NO851119L (no) 1985-09-23
FI851117A0 (fi) 1985-03-20
DK128885D0 (da) 1985-03-21
DK128885A (da) 1985-09-22

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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): BE CH DE FR GB IT LI NL SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: STROEMSHOLMENS MEKANISKA VERKSTAD AB

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19860624

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GUSTAFSSON, JAN ALLAN KRISTER

Inventor name: LARSSON, PER GOERAN