EP0099097A2 - Dispositif pour produire une force de travail, en pariculier pour moutons, presses ou similaires - Google Patents

Dispositif pour produire une force de travail, en pariculier pour moutons, presses ou similaires Download PDF

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Publication number
EP0099097A2
EP0099097A2 EP83106784A EP83106784A EP0099097A2 EP 0099097 A2 EP0099097 A2 EP 0099097A2 EP 83106784 A EP83106784 A EP 83106784A EP 83106784 A EP83106784 A EP 83106784A EP 0099097 A2 EP0099097 A2 EP 0099097A2
Authority
EP
European Patent Office
Prior art keywords
piston
pressure
piston rod
working
cylinder chamber
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Withdrawn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
EP83106784A
Other languages
German (de)
English (en)
Other versions
EP0099097A3 (fr
Inventor
Horst Dipl.-Ing. Knäbel
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 EP0099097A2 publication Critical patent/EP0099097A2/fr
Publication of EP0099097A3 publication Critical patent/EP0099097A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/02—Placing by driving
    • E02D7/06—Power-driven drivers
    • E02D7/10—Power-driven drivers with pressure-actuated hammer, i.e. the pressure fluid acting directly on the hammer structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J7/00—Hammers; Forging machines with hammers or die jaws acting by impact
    • B21J7/20—Drives for hammers; Transmission means therefor
    • B21J7/22—Drives for hammers; Transmission means therefor for power hammers
    • B21J7/28—Drives for hammers; Transmission means therefor for power hammers operated by hydraulic or liquid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/06—Means for driving the impulse member
    • B25D9/12—Means for driving the impulse member comprising a built-in liquid motor, i.e. the tool being driven by hydraulic pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D9/14—Control devices for the reciprocating piston
    • B25D9/145—Control devices for the reciprocating piston for hydraulically actuated hammers having an accumulator

Definitions

  • the invention relates to a device for generating a worker according to the preamble of claim 1.
  • a device for generating a worker for example for shaping, deforming, compressing, striking and driving, is known, in which a displaceable working piston is arranged in a cylinder space of a housing.
  • This working piston is received by a separate piston rod that transmits the working force, which is led out from both ends of the housing and has a coupling device designed as a driver, via which the working force is transferred from the working piston to the piston rod on the one hand, and the working piston after the working stroke on the other hand into its starting position is deferred.
  • This coupling device also allows the piston rod to advance in the working direction at the end of the working stroke of the working piston.
  • the part of the cylinder chamber adjacent to the working surface of the working piston, the primary cylinder chamber, supplies the work force and is constantly under pressure from an energy store.
  • the part of the cylinder chamber located on the other side of the working piston, the secondary cylinder chamber, is with a pressure medium for force compensation before starting work of the working piston and both with the primary cylinder chamber connectable as well as connected to a relaxation unit without significant pressure loss.
  • the working piston and the piston rod are returned to the starting position, which is done by the pressure medium in the secondary cylinder space, the working piston normally strikes the wall of the housing, which would lead to its destruction.
  • a rubber buffer must be provided outside the housing in the area of the piston rod, for example. Here part of the available energy is converted into heat via internal friction, which is lost unused. The rubber buffer is gradually destroyed and must be replaced.
  • the invention has for its object to provide a device for generating a worker according to the preamble of claim 1 so that the energy still available when resetting the working piston and the piston rod can be stored and largely used in the subsequent working stroke, ie that the efficiency is improved.
  • a device for generating a worker is designed according to the characterizing part of claim 1.
  • This design causes the sleeve to be lifted from its stop on the housing when the working piston and the piston rod are reset after the first working stroke, so that both the working piston and the piston rod assume a different starting position before the next working stroke.
  • the energy stored by a kind of pre-tensioning of the sleeve is given off by the same to the working piston during the subsequent working stroke, so that with this device, a larger ar in every second and subsequent working stroke without additional energy expenditure force than is available on the piston rod during the first working stroke.
  • This improvement in efficiency results in a remarkable increase in performance and enables a smaller and therefore less expensive training or manufacture of the device for predetermined workers.
  • FIG. 1 of the drawing shows a device 1 for generating a worker, which is used for example as a ram and acts vertically.
  • This device 1 consists of a housing 2, drawn in one piece, but composed of several parts, with a stepped cylinder space 3, which is subdivided into a primary cylinder space 3 a and a secondary cylinder space 3 b by a working piston 4 that can be moved sealingly in the cylinder space 3.
  • the working piston 4 is sealingly held on a piston rod 5, which is guided out of the housing 2 with both ends sealed.
  • the piston rod 5 has diameters of different sizes on both sides of this projection 6.
  • the part 5a of the piston rod 5 which receives the working piston 4 is designed to be larger by a predetermined amount in diameter than the part 5b of the piston rod 5 which projects through the secondary cylinder space 3b, the purpose of these diameter differences being explained further below.
  • the part 5b of the piston rod 5 carries at its end protruding from the housing 2 a coupling 7, to which a sheet pile 8, only indicated, can be connected in the present example.
  • a sleeve 9 is slidably mounted in the primary cylinder chamber 3a, which encloses the part 5a of the piston rod 5 at a distance and, in its basic position shown in FIGS. 1 and 2, bears against an abutment 11 provided in the housing 2 with an outer, circumferential collar 10.
  • the stop 11 is in the illustrated embodiment stationary and integrally formed with the housing 2. It is also possible to produce the stop 11 separately from the housing 2 and to arrange it in a stationary or displaceable manner in the housing 2. In the case of a displaceable arrangement of a stop 11, a shoulder or the like must be provided in the housing 2, which determines the basic position of the stop 11 and thus the drawn initial position of the sleeve 9.
  • the working piston 4 bears against the end face 12 of the sleeve 9 facing it, so that the sleeve 9 thus determines the drawn basic or starting position of the working piston 4.
  • a plurality of radial grooves are in the end face 12 of the sleeve 9 13 incorporated, which ensure that in the drawn position of the working piston 4 and sleeve 9 the actual primary cylinder chamber 3a is connected to a space 14 separated by the working piston 4 and the sleeve 9 from the primary cylinder chamber 3a.
  • the sleeve 9 is sealingly guided in the housing 2 both in the region of the projection of the housing 2, which forms the stop 11, and in the region of the outer, circumferential collar 10.
  • a channel 15 opens into the cylinder space 3 or primary cylinder space 3b.
  • This channel 15 is connected, for example, to a reservoir for liquid pressure medium, not shown, and ensures that the gap or space 16 (FIG. 4) delimited by the sleeve 9 with the collar 10 and the housing 2 with the stop 11 is constantly depressurized.
  • the primary cylinder chamber 3a is connected via a channel 17 with a relatively large cross section to an energy store 18, which in this exemplary embodiment is designed as a piston accumulator and is filled with prestressed compressed gas, a pressure medium supply line 19 opening into the channel 17, which leads to a pressure medium source (not shown), for example a pump , connected.
  • This channel 21 is additionally connected, without any notable throttle resistance, to an expansion unit, not shown, of a known type, which can accommodate the expansion volume of the secondary cylinder space.
  • the sleeve 9 is brought into abutment with the collar 10 by the pressure prevailing in the primary cylinder space 3a, that is, the sleeve 9 takes on account of the different pressure-effective surfaces shown in FIGS 1 and 2 shown position and thus overcomes the force resulting from the differential area of the piston rod 5 and the pressure.
  • the same pressure as in the primary cylinder chamber 3a is also established in the secondary cylinder chamber 3b.
  • the differential area of the sleeve 9 acted upon by the pressure medium pressure must be larger than the difference surface of the piston rod 5 affected by the same pressure medium pressure or the external force or the spring force.
  • the V will now ER- connection between primary cylinder chamber 3a and the secondary cylinder chamber 3b locked and the secondary cylinder chamber 3b connected to the expansion unit, and relieved of pressure. This results in an abrupt load on the working piston 4 and thus on the piston rod 5.
  • a relative movement takes place between the piston rod 5 with the working piston 4 and the housing 2, the housing 2 and any additional mass possibly associated therewith acting as a reaction with respect to the ramming process, and opposing the piston rod 5 resting on the sheet pile 8 by means of the coupling 7 lift with piston 4 (Fig. 3).
  • the expansion volume which is displaced from the secondary cylinder space 3b during this blow and which is smaller than the total volume of the secondary cylinder space 3b is completely absorbed by the expansion unit.
  • the housing 9 and the sleeve 9 abutting the stop 11 of the housing 2 and the working piston 4 which is still at a distance between the sleeve 9 and the projection 6 move downward.
  • the kinetic energy still present is Transfer the housing 2 and any additional mass possibly connected to the housing 2 via the projection 6 to the piston rod 5 by interrupting the pressure equalization that is still present between the primary cylinder chamber 3a and the secondary cylinder chamber 3b by the frictional connection between the working piston 4 and the projection 6.
  • the pressure in the secondary cylinder space 3b is reduced.
  • the stop 11 slidably in the housing 2. This ensures that the sleeve 9 with its collar 10 does not hit the stop 11 hard.
  • the stop 11 must be designed such that it can be moved into its basic position, for example against a shoulder of the housing 2, by the pressure in the primary cylinder chamber 3a or in the chamber 14.
  • the sleeve 9 it is possible for the sleeve 9 to protrude at least partially from the primary cylinder chamber 3a.
  • the sleeve 9 has to be adjusted in its basic position by a separate pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Actuator (AREA)
  • Press Drives And Press Lines (AREA)
  • Fluid-Damping Devices (AREA)
EP83106784A 1982-07-15 1983-07-11 Dispositif pour produire une force de travail, en pariculier pour moutons, presses ou similaires Withdrawn EP0099097A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3226468 1982-07-15
DE19823226468 DE3226468A1 (de) 1982-07-15 1982-07-15 Vorrichtung zum erzeugen einer arbeitskraft, insbesondere fuer rammen, pressen und dgl.

Publications (2)

Publication Number Publication Date
EP0099097A2 true EP0099097A2 (fr) 1984-01-25
EP0099097A3 EP0099097A3 (fr) 1984-05-02

Family

ID=6168492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106784A Withdrawn EP0099097A3 (fr) 1982-07-15 1983-07-11 Dispositif pour produire une force de travail, en pariculier pour moutons, presses ou similaires

Country Status (2)

Country Link
EP (1) EP0099097A3 (fr)
DE (1) DE3226468A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3817487A1 (de) * 1987-05-29 1988-12-15 Asea Brown Boveri Kraftausgleichsvorrichtung fuer ein drehbares mechanisches element
WO1995016548A1 (fr) * 1993-12-17 1995-06-22 Jarmo Uolevi Leppanen Systeme de chargement d'un accumulateur hydraulique
WO1998031509A1 (fr) * 1997-01-20 1998-07-23 Francesco Verardi Marteau hydraulique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1576175B1 (de) * 1966-11-15 1971-12-23 Barkas Werke Veb Druckmittelbetaetigter Arbeitszylinder mit zweiseitiger Beaufschlagung,insbesondere fuer die Schaltung von Getrieben fuer Motorfahrzeuge
DE2916191A1 (de) * 1979-04-21 1980-10-23 Horst Knaebel Krafteinheit als antriebsvorrichtung, z.b. zum umformen, verformen, verdichten, schlagen und antreiben
EP0110876B1 (fr) * 1982-06-08 1987-10-07 Intreprinderea De Utilaj Greu 'progresul' Procede et dispositif de commande pour un marteau hydraulique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3817487A1 (de) * 1987-05-29 1988-12-15 Asea Brown Boveri Kraftausgleichsvorrichtung fuer ein drehbares mechanisches element
WO1995016548A1 (fr) * 1993-12-17 1995-06-22 Jarmo Uolevi Leppanen Systeme de chargement d'un accumulateur hydraulique
WO1998031509A1 (fr) * 1997-01-20 1998-07-23 Francesco Verardi Marteau hydraulique

Also Published As

Publication number Publication date
DE3226468C2 (fr) 1992-02-13
DE3226468A1 (de) 1984-01-19
EP0099097A3 (fr) 1984-05-02

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