EP0183874A1 - Outil hydraulique de percussion - Google Patents

Outil hydraulique de percussion Download PDF

Info

Publication number
EP0183874A1
EP0183874A1 EP84114947A EP84114947A EP0183874A1 EP 0183874 A1 EP0183874 A1 EP 0183874A1 EP 84114947 A EP84114947 A EP 84114947A EP 84114947 A EP84114947 A EP 84114947A EP 0183874 A1 EP0183874 A1 EP 0183874A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
piston rod
piston
housing
bore
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.)
Granted
Application number
EP84114947A
Other languages
German (de)
English (en)
Other versions
EP0183874B1 (fr
Inventor
Friedhelm Schwarz
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
Priority to AT84114947T priority Critical patent/ATE47552T1/de
Priority to EP84114947A priority patent/EP0183874B1/fr
Publication of EP0183874A1 publication Critical patent/EP0183874A1/fr
Application granted granted Critical
Publication of EP0183874B1 publication Critical patent/EP0183874B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • 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
    • B25D9/16—Valve arrangements therefor
    • B25D9/20—Valve arrangements therefor involving a tubular-type slide valve
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D2209/002—Pressure accumulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2209/00—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
    • B25D2209/005—Details of portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously having a tubular-slide valve, which is coaxial with the piston

Definitions

  • the invention relates to a hydraulic impact tool with the features of the preamble of claim 1.
  • Such hydraulically driven hammers are constructed in such a way that the piston moves in a cylinder with the piston rod brought out and the piston rod strikes a chisel shortly before reaching the lower end position.
  • the impact energy, the impact rate and the efficiency are decisive for the evaluation of the hammer.
  • the impact energy depends on the bear weight and the top speed of the bear.
  • the final speed at which the bear hits the chisel is in turn limited by the achievable strength of the material. This also defines the number of strokes.
  • the invention has for its object to change the known hydraulically driven striking tools in such a way that the bear weight can be increased with space-saving arrangement and good efficiency of the striking tool.
  • the cylinder movable relative to the fixed piston rod serves as a bear.
  • the cylinder has a larger volume than the piston rod, it is possible to achieve the required bear weight with small external dimensions. It can be used with the full piston and ring area with a small diameter and thus significantly smaller gap losses, so that the efficiency is significantly improved.
  • Another advantage is that no seals are required for the moving cylinder serving as a bear show only a limited life in the known impact tools due to the high pressure and high speed.
  • the oil return through the housing of the striking tool can be used in hot operations, since the oil flow ensures good heat dissipation.
  • the striking tool has a housing 1, which is composed of several cylindrical parts. The parts are partly welded together and partly through screws 2 inserted in the longitudinal direction are clamped. A chisel 4 is held in the lower part of the housing 1 by means of a locking pin 3. An intermediate piston 5 is provided above the chisel 4 and is guided through a guide bush 6 inserted into the housing 1.
  • the hydraulic drive of the striking tool consists of a piston rod 7, which is held immovably within the housing 1.
  • a cylinder 8 is also provided, which is closed by a lower striking plate 9 facing the intermediate piston 5 and an upper cover 10 and has a central piston chamber 11.
  • the cylinder 8 is guided by a cylindrical guide section 12 which is fastened to the housing 1 via struts 13.
  • the piston rod 7 is passed through a rod bore in the cover 10 of the cylinder 8 and protrudes into the piston chamber 11 so that the cylinder 8 can slide on the fixed piston rod 7.
  • the housing 1 is provided with an oil supply 14 which opens into a reservoir 15 and into a bore 16 which is arranged in the longitudinal axis of the piston rod 7.
  • the memory 15 is placed on the housing 1 and crossed by a membrane 17.
  • the bore 16 in the piston rod 7 ends just below the entry of the piston rod 7 into the piston chamber 11 in two transverse bores 18, 19, which lead to an annular space 20 within the cylinder 8.
  • an axial bore 21 is arranged in the wall of the cylinder 8, which connects the annular space 20 with an upper transverse bore 22, which starts from the axial bore 21 is guided through the wall of the cylinder 8 into the piston chamber 11.
  • a lower transverse bore 23 is provided below the upper transverse bore 22, which penetrates the entire wall of the cylinder 8 and thus connects the piston chamber 11 to the interior 24 of the housing 1.
  • the housing 1 is provided with an oil drain 25, which has a connection to an interior 24 of the housing 1.
  • a control piston 26 is arranged in the piston chamber 11 at a distance from the end of the piston rod 7.
  • the control piston 26 has an annular groove 27 on its outside, which is connected via transverse bores 28 to a central bore 29 which penetrates part of the control piston 26 and is open to the piston chamber 11.
  • the control piston 26 is displaceable within the piston chamber 11 such that, depending on its position, the annular groove 27 faces the upper transverse bore 22, which is connected to the oil supply 14, and the lower transverse bore 23, which is connected to the oil drain 25.
  • the part of the piston chamber 11 below the control piston 26 is connected to a further bore 30 which is axially guided through the wall of the cylinder 8.
  • This further bore 30 ends in a transverse bore 31 leading into the piston chamber 11, depending on the position of the cylinder 8 relative to Piston rod 7 has this transverse bore 31 connection to an annular gap 32 which is formed between the inner wall of the cylinder 8 and a reduced diameter middle part of the piston rod 7.
  • the annular gap 32 has transverse bores 33 penetrating through the wall of the cylinder 8 and permanently connected to the interior 24 of the housing 1 and thus with the oil drain 25.
  • the impact tool described controls itself, that is, apart from control piston 26, no additional valves or slides are required to operate the impact tool. As long as the chisel is not pressed onto a solid surface, the cylinder 8 is in its lowest rest position and the pressure oil flows without pressure via the oil supply 14 through the bore 16 and the transverse bores 18 into the interior 24 and via the oil drain 25.
  • the chisel 14 In order to put the striking tool into operation, the chisel 14 must be placed on a solid surface so that the chisel 4 presses the cylinder 8, which acts as a bear, upwards via the intermediate piston 5.
  • the control piston 26 and the cylinder 8, together with the striking plate 9 and the cover 10, have the position shown in FIG. 2.
  • the transverse bores 18 are pushed through the rod bore of the cover 10 into the annular space 20 and the previously described short circuit between the oil supply 14 and the oil drain 25 is interrupted. Via the oil supply 14 and the bore 16 in the piston rod 7, an oil pressure is created in the annular space 20 and the axial bore 21, which drives the bear, which consists of the cylinder 8, the striking plate 9 and the cover 10, upwards.
  • the upper transverse bore 22 is closed by the control piston 26.
  • the control piston 26 is pressurized with pressure oil by means of pressure oil via the transverse bore 31 opening into the piston chamber 11 and the axial bore 30 in the wall of the cylinder 8 on the lower control piston surface and thus shifted into the upper position.
  • the reversal causes the control piston 26 to assume the position shown in FIG. 1.
  • the pressure oil is passed through the axial bore 21 and the upper transverse bore 22, the annular groove 27, the transverse bores 28 and the central bore 29 of the control piston into the piston chamber 11 of the cylinder 8, so that now the annular chamber 20 and the piston chamber 11th are pressurized in the same way.
  • the bear is now moved downwards until it hits the chisel 4 via the intermediate piston 5 and releases the existing kinetic energy to the chisel 4.
  • the transverse bore 31 is connected to the annular gap 32 of the piston rod 7, so that the pressure oil below the control piston 26 via the axial bore 30, via the transverse bore 31, the annular gap 32 and the transverse bore 33 permanently connected to the interior 24 can escape and thereby the control piston 26 is shifted into the lower position shown in Fig. 2 and a renewed work cycle as described above is initiated again.
  • the striking tool comes to a standstill when the chisel 4 is no longer in opposition.
  • the bear not only reaches the striking position during the downward stroke, but also runs into the lowest position, so that the transverse bore 18 extends into the interior 24 again and the short circuit with the unpressurized oil circulation is thus restored in the manner previously described.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP84114947A 1984-12-07 1984-12-07 Outil hydraulique de percussion Expired EP0183874B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT84114947T ATE47552T1 (de) 1984-12-07 1984-12-07 Hydraulisches schlagwerkzeug.
EP84114947A EP0183874B1 (fr) 1984-12-07 1984-12-07 Outil hydraulique de percussion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84114947A EP0183874B1 (fr) 1984-12-07 1984-12-07 Outil hydraulique de percussion

Publications (2)

Publication Number Publication Date
EP0183874A1 true EP0183874A1 (fr) 1986-06-11
EP0183874B1 EP0183874B1 (fr) 1989-10-25

Family

ID=8192338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114947A Expired EP0183874B1 (fr) 1984-12-07 1984-12-07 Outil hydraulique de percussion

Country Status (2)

Country Link
EP (1) EP0183874B1 (fr)
AT (1) ATE47552T1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0617926A2 (fr) * 1993-03-30 1994-10-05 Imt Integral Medizintechnik Ag Outil pneumatique à percusion et piston pour un tel outil
CN103313669A (zh) * 2010-12-29 2013-09-18 克里斯托弗·皮迪斯尼 电机驱动矫形冲击工具

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE150463C (fr) *
AU425300B2 (en) * 1970-12-30 1972-06-12 A percussive mechanism for making holes in the ground
AU478179B2 (en) * 1974-09-06 1975-09-17 Graeme Rear Ian Fluid operated hammer
US4074777A (en) * 1974-08-08 1978-02-21 Atlas Copco Aktiebolag Pneumatic impact tool
NL7700457A (en) * 1977-01-17 1978-07-19 Abraham Gien En Bernard Lionel Pneumatic hammer drill assembly - has valve assembly adapted to open alternative fluid supply paths
US4290489A (en) * 1974-12-18 1981-09-22 Charles Leavell Vibrationless pneumatic tools
WO1984004482A1 (fr) * 1983-05-13 1984-11-22 Landmark West Ltd Perforatrice permettant de percer la roche

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026193A (en) * 1974-09-19 1977-05-31 Raymond International Inc. Hydraulically driven hammer system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE150463C (fr) *
AU425300B2 (en) * 1970-12-30 1972-06-12 A percussive mechanism for making holes in the ground
US4074777A (en) * 1974-08-08 1978-02-21 Atlas Copco Aktiebolag Pneumatic impact tool
AU478179B2 (en) * 1974-09-06 1975-09-17 Graeme Rear Ian Fluid operated hammer
US4290489A (en) * 1974-12-18 1981-09-22 Charles Leavell Vibrationless pneumatic tools
NL7700457A (en) * 1977-01-17 1978-07-19 Abraham Gien En Bernard Lionel Pneumatic hammer drill assembly - has valve assembly adapted to open alternative fluid supply paths
WO1984004482A1 (fr) * 1983-05-13 1984-11-22 Landmark West Ltd Perforatrice permettant de percer la roche

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0617926A2 (fr) * 1993-03-30 1994-10-05 Imt Integral Medizintechnik Ag Outil pneumatique à percusion et piston pour un tel outil
EP0617926A3 (fr) * 1993-03-30 1995-09-20 Integral Medizintechnik Outil pneumatique à percusion et piston pour un tel outil.
US5485887A (en) * 1993-03-30 1996-01-23 Imt Integral Medizintechnik Ag Pneumatic impact tool and piston for a pneumatic impact tool
CN103313669A (zh) * 2010-12-29 2013-09-18 克里斯托弗·皮迪斯尼 电机驱动矫形冲击工具
CN103313669B (zh) * 2010-12-29 2015-10-07 医药企业有限公司 电机驱动矫形冲击工具

Also Published As

Publication number Publication date
ATE47552T1 (de) 1989-11-15
EP0183874B1 (fr) 1989-10-25

Similar Documents

Publication Publication Date Title
DE3125143C2 (fr)
DE1528583A1 (de) Hydraulisch oder pneumatisch kontinuierlich betaetigter Kolbenantrieb mit hin- und hergehender Bewegung,insbesondere doppeltwirkender Druckuebersetzer
DE4227065C2 (de) Hydropneumatischer Hammer
EP0149967B1 (fr) Outil de percussion commandé hydrauliquement
DE2512731A1 (de) Hydraulisches schlaggeraet
DE2643483A1 (de) Ein von einer druckfluessigkeit getriebener schlagapparat
DE3534692C2 (fr)
DE937763C (de) Fluessigkeitsbetaetigter Stossantrieb, insbesondere fuer Erdbohrer
DE2461633C2 (de) Hydraulische Schlagvorrichtung
DE3911495C1 (en) Hydraulic valve actuation unit for piston engines
EP0168382A1 (fr) Dispositif pour le forage à percussion et/ou rotation
EP0183874A1 (fr) Outil hydraulique de percussion
DE2733508C3 (de) Versenkbohrhammer
DE2837712A1 (de) Hammer
DE2625063A1 (de) Steuervorrichtung zur geschwindigkeitsregelung von pneumatischen und/oder hydraulischen arbeitskolben
DE3207995C2 (de) Ventil für das Umsteuern der Kolbenbewegung einer hydraulischen Zylinder-Kolbeneinheit
EP0933169B1 (fr) Dispositif de percussion actionné par un fluide
DE2748955A1 (de) Pneumatischer oder hydraulischer drehantrieb insbesondere fuer schwenktueren
EP0089568B1 (fr) Dispositif d'actionnement rotatif à fluide sous pression
DE1293026B (de) Linear wirkender Stellzylinder
DE3336684C2 (fr)
DE3021633A1 (de) Mehrstufiger hydraulischer teleskopzylinder
DE19757157C2 (de) Hydraulischer Linearantrieb
DE4026959A1 (de) Elektromotorisch angetriebene lineareinheit mit hydraulischem druckuebersetzer
DE1634298C3 (de) Hydraulischer Rammhammer

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

Kind code of ref document: A1

Designated state(s): AT BE CH FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19861113

17Q First examination report despatched

Effective date: 19880422

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 47552

Country of ref document: AT

Date of ref document: 19891115

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19921119

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19921120

Year of fee payment: 9

Ref country code: CH

Payment date: 19921120

Year of fee payment: 9

Ref country code: AT

Payment date: 19921120

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19921230

Year of fee payment: 9

EPTA Lu: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19931207

Ref country code: AT

Effective date: 19931207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19931208

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19931231

Ref country code: CH

Effective date: 19931231

Ref country code: BE

Effective date: 19931231

BERE Be: lapsed

Owner name: SCHWARZ FRIEDHELM

Effective date: 19931231

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed

Ref document number: 84114947.9

Effective date: 19940710

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19971203

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19981207

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19981207

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20031128

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20031209

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20041207

NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 20041207