SE8402232D0 - HYDRAULIC IMPACT ENGINE - Google Patents

HYDRAULIC IMPACT ENGINE

Info

Publication number
SE8402232D0
SE8402232D0 SE8402232A SE8402232A SE8402232D0 SE 8402232 D0 SE8402232 D0 SE 8402232D0 SE 8402232 A SE8402232 A SE 8402232A SE 8402232 A SE8402232 A SE 8402232A SE 8402232 D0 SE8402232 D0 SE 8402232D0
Authority
SE
Sweden
Prior art keywords
distribution valve
valve
piston hammer
control
pressurized
Prior art date
Application number
SE8402232A
Other languages
Swedish (sv)
Other versions
SE8402232L (en
SE442100B (en
Original Assignee
Atlas Copco 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 Atlas Copco Ab filed Critical Atlas Copco Ab
Priority to SE8402232A priority Critical patent/SE442100B/en
Publication of SE8402232D0 publication Critical patent/SE8402232D0/en
Priority to EP85850135A priority patent/EP0161227A1/en
Publication of SE8402232L publication Critical patent/SE8402232L/en
Publication of SE442100B publication Critical patent/SE442100B/en

Links

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
    • B25D9/06—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
    • B25D9/26—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

In a hydraulic percussive rock drill, the bistable distribution valve (31) for controlling the reciprocation of the piston hammer (13) has control chambers (41, 42) which, when pressurized urge the distribution valve to switch over. The control chambers (41, 42) are pressurized through control passages (43, 44; 47, 48) that end in the cylinder for the piston hammer (13). An auxiliary valve (54) controls the control passages (43, 44; 47, 48). As soon as the distribution valve (31) has shifted its position, the one of the control chambers (43, 44; 47, 48) that effected the movement of the distribution valve (31) is drained through the auxiliary valve (54) so that the distribution valve (31) is prepared for the next movement. The rapid operation of the auxiliary valve (54) permits for the selection of very short piston hammer strokes and high impact frequencies.
SE8402232A 1984-04-24 1984-04-24 HYDRAULIC SHOCK DRILL FOR A DRILLING MACHINE THAT ALLOWS GREAT SCOPE FOR STRAIGHT LENGTH AND FREQUENCY SE442100B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE8402232A SE442100B (en) 1984-04-24 1984-04-24 HYDRAULIC SHOCK DRILL FOR A DRILLING MACHINE THAT ALLOWS GREAT SCOPE FOR STRAIGHT LENGTH AND FREQUENCY
EP85850135A EP0161227A1 (en) 1984-04-24 1985-04-22 Hydraulic percussive machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8402232A SE442100B (en) 1984-04-24 1984-04-24 HYDRAULIC SHOCK DRILL FOR A DRILLING MACHINE THAT ALLOWS GREAT SCOPE FOR STRAIGHT LENGTH AND FREQUENCY

Publications (3)

Publication Number Publication Date
SE8402232D0 true SE8402232D0 (en) 1984-04-24
SE8402232L SE8402232L (en) 1985-10-25
SE442100B SE442100B (en) 1985-12-02

Family

ID=20355651

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8402232A SE442100B (en) 1984-04-24 1984-04-24 HYDRAULIC SHOCK DRILL FOR A DRILLING MACHINE THAT ALLOWS GREAT SCOPE FOR STRAIGHT LENGTH AND FREQUENCY

Country Status (2)

Country Link
EP (1) EP0161227A1 (en)
SE (1) SE442100B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2618092B1 (en) * 1987-07-17 1989-11-10 Montabert Ets HYDRAULIC DISTRIBUTOR FOR A PERCUSSION APPARATUS MOUSED BY AN INCOMPRESSIBLE PRESSURE FLUID
SE530885C2 (en) 2007-02-23 2008-10-07 Atlas Copco Rock Drills Ab Procedure for percussion, percussion and rock drilling

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2517243A (en) * 1944-02-26 1950-08-01 Alco Valve Co Pressure controlled pump operating valve mechanism
FR1007678A (en) * 1948-03-19 1952-05-08 Control device for oscillating control devices actuated by exhaust air
DE1703061C3 (en) * 1968-03-27 1974-02-14 Fried. Krupp Gmbh, 4300 Essen Hydraulically operated piston engine
US4172411A (en) * 1976-06-09 1979-10-30 Mitsui Engineering & Shipbuilding Co., Ltd. Hydraulic hammer
GB1599127A (en) * 1978-03-22 1981-09-30 Dobson Park Ind Powered percussive hand tools

Also Published As

Publication number Publication date
EP0161227A1 (en) 1985-11-13
SE8402232L (en) 1985-10-25
SE442100B (en) 1985-12-02

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