WO2003061912A1 - Marteau hydraulique a faible bruit - Google Patents

Marteau hydraulique a faible bruit Download PDF

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Publication number
WO2003061912A1
WO2003061912A1 PCT/JP2002/000360 JP0200360W WO03061912A1 WO 2003061912 A1 WO2003061912 A1 WO 2003061912A1 JP 0200360 W JP0200360 W JP 0200360W WO 03061912 A1 WO03061912 A1 WO 03061912A1
Authority
WO
WIPO (PCT)
Prior art keywords
hammer
pressure
chisel
impact
piston
Prior art date
Application number
PCT/JP2002/000360
Other languages
English (en)
Japanese (ja)
Inventor
Osamu Hori
Original Assignee
Konan Electric Company Limited
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 Konan Electric Company Limited filed Critical Konan Electric Company Limited
Priority to PCT/JP2002/000360 priority Critical patent/WO2003061912A1/fr
Priority to JP2003561834A priority patent/JPWO2003061912A1/ja
Publication of WO2003061912A1 publication Critical patent/WO2003061912A1/fr

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
    • B25D9/02—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously of the tool-carrier piston type, i.e. in which the tool is connected to an impulse member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/125—Hydraulic tool components

Definitions

  • the present invention relates to a hydraulically driven low-noise hammer, and in particular, to provide a low-noise hammer that prevents a decrease in the number of hits, outputs stable hitting energy, is lightweight, and has excellent workability. is there. Background art
  • Japanese Patent Application Laid-Open No. H10-58350 "Hydraulically driven low-noise hammer” in which the chisel and upper piston are integrated as a hitting piston, Kaihei 1 0 — 5 8 3 5 4 There is a “hydraulic driven low noise hammer”. All are oil; (1) The hydraulic screw hammer that raises and lowers by driving directly, or the chisel that moves up and down in connection with the driving screw hits and crushes the object.
  • Japanese Patent Application Laid-Open No. H10-158350 "Hydraulically driven low-noise hammer” is an improved version of Japanese Patent Laid-Open No. Hei 10-58534 "Hydraulically driven low-noise hammer".
  • Japanese Patent Application Laid-Open No. H10-158350 "Hydraulically driven low noise hammer" will be described.
  • Japanese Patent Laid-Open No. H10-588350 "Hydraulically driven low-noise hammer” has a hammering piston or a chisel connected to a hammering piston. Hitting the shatter directly. Therefore, compared to the hydraulic breaker currently performing the same work in the market, the hammer is very low noise and has less harsh metal noise because the hitting piston does not hit the chisel. .
  • the impact piston has a control mechanism that rises to a predetermined position after the impact. That is, the ascending position is constant, and the descending position changes according to the biting condition.
  • the hammering impact speed is set to be the maximum in the stroke up to the initial pressing position (the position where the bite allowance is 0), so the bite allowance is set. As the size increases, the stroke time at the maximum speed increases, and the impact force decreases due to insufficient oil.
  • the present invention prevents a reduction in the number of hits, outputs stable hitting energy, and is lightweight, excellent in workability, and low in noise. It provides sound hammer to the market.
  • the present invention raises or lowers a striking screw slidably provided in a cylinder by switching hydraulic pressure, and directly hits a crushed object with a chisel portion of the striking screw.
  • a hydraulically driven low noise hammer In such a hydraulically driven low noise hammer,
  • the present invention provides a hydraulically driven low-noise hand equipped with a manually operated block mechanism that locks the chisel portion of the striking piston at the maximum protruding position when long work is required.
  • the present invention provides a stroke selection mechanism for switching the stroke stroke when the bite allowance of the chisel portion of the impact piston exceeds a certain value, and a different location.
  • This is a hydraulically driven, low-noise hammer equipped with an initial state return mechanism that returns to the initial state when the player strikes again.
  • the impact piston speed is adjusted so that the acceleration is not accelerated further.
  • This is a hydraulically driven, low-noise hammer equipped with a mechanism for controlling without using the large-diameter portion of the piston.
  • FIG. 1 is an explanatory view of a hydraulically driven low-noise hammer according to the present invention.
  • the hammer has already been hit several times, and has hit and entered a reversing ascent (return) stroke. You. If it is a start, the initial state recovery valve IV is being switched by the spring force.
  • the pilot pressure acquisition groove is PPG1.
  • the impact piston 1 slides inside the hammer body 7.
  • the main control MCV which houses various valves in the control housing 13, uses a high-pressure pump in the chamber 14 above the striking piston.
  • the main control valve MCV and the upper piston The port that communicates with the room 14 is called the C port.
  • the pilot valve PV is a valve for releasing the pilot pressure introduced into the main control valve MCV to the drain tank 11, and the pressure of the C port is used. It operates with the pressure difference between the high pressure in the hammer body 7 and the high pressure in the hammer body 7, and if the pressure of the C port is the same as the high pressure in the hammer body 7 due to the pressure receiving area difference, the pilot pressure is drained. Operates to release to tank 1 1.
  • the speed control valve SPV throttles the high-pressure passage at the lower side of the impact piston 1 after accelerating a certain distance so that the impact speed of the impact piston 1 does not become excessive. Control. As the driving force of the speed control valve SPV, the C port pressure and the high pressure on the lower side of the impact screw 1 are introduced, and the ratio of each pressure receiving area is determined by the upper pressure receiving surface A of the impact screw 1 and the impact screw. It approximates the pressure receiving area ratio of the lower pressure receiving surface B of the ton 1.
  • the pilot valve SV 1 passes the pilot pressure to the main control valve MCV. Shut off the C port pressure to the pilot valve PV and speed control valve SPV.
  • the driving pressure of the sequential valve SV1 is the pilot pressure and the C port pressure.
  • the initial state recovery valve IV opens the pilot passage leading to the sequential valve SV1 and the main control valve MCV. This is a valve that shuts off.
  • the driving force of the initial state recovery valve IV is the panel force of panel 9 and (operating pressure + PPG 1 pressure), but once the valve is switched by the spring force of spring 9, the operating pressure is Valve does not return unless PPG 1 pressure is high
  • the stroke selection valve STV 1 switches the stroke selection valve STV 1 when the impact piston 1 falls and the STV 1 G becomes low pressure. Change the acquisition groove from PPG 1 to PPG 2. As a result, the ascending position of the impact piston 1 is set to a position where the pressure of the PFG 2 becomes high.
  • the drive pressure of the stroke selection valve STV 1 is the operating pressure and the STV 1 G groove pressure or the PPG 1 groove pressure, but once the STV 1 G groove pressure becomes low and the valve switches. It does not return unless PPG 1 is at high pressure.
  • the stroke selection valve STV 2 switches the STV 2 when the impact piston 1 drops and the STV 2 G becomes low pressure, and the pilot pressure acquisition groove is moved from the PPG 2 to the subsequent pilot pressure acquisition groove. Change to PPG 3. Other functions are the same as those of the stroke selection valve STV1.
  • the block valve BV blocks the return passage of the C port and does not pull in the chisel 10 of the impact piston 1 forcefully. I do.
  • the driving force of the block valve B V is the spring force of the panel 12 and the operating pressure.
  • the check valve C V1 prevents the pilot pressure from being released at the same time even if the pilot pressure acquisition groove in the hammer main body 7 has a low pressure.
  • the force of 12889 of each vanoleb is as follows: block valve BV> main control valve MCV> initial state recovery valve IV.
  • the block valve BV is turned off (the return path of the C port is always open). At this time, after hitting the chisel A circuit that pulls 10 back into the hammer body 7.
  • the main control valve MCV is at a position where the C port is passed through the drain tank 6 by the spring 8.
  • the valve IV of the initial state is blocked by the spring 9 from the passageway of the pi opening.
  • Sequential valve SV 1 Generic valve SV 2, Pilot valve PV, Stroke selection valve STV 1, Stroke selection valve STV
  • the positions of 2 and chisel 10 may be arbitrary.
  • the high pressure of PPG 1 switches the initial state recovery valve IV (until this valve is switched, the high pressure of PPG 2 or PPG 3 is led to the initial state recovery valve IV). Even if it is stopped by the initial state recovery valve IV, it is not introduced into the main control valve MCV, and the non-operator does not operate.) Introduced to the sequential valve SV 1 as a partial pressure. With this pilot pressure, the sequence control valve SV 1 increases the pilot pressure by the main control valve MCV and the sequence control valve SV. 2 Pipe outlet valve Maintained at a position communicating with the passage to be introduced into PV. After that, the pilot pressure is reduced by the main outlet MC Is guided to gain emissions Shea turbocharger Rubanorebu SV 2 0 I Lock the door 'Lube PV.
  • the main control valve MCV is switched by the pilot pressure, and high-pressure oil is introduced into the C port.
  • the impact piston 1 begins to descend (stroke stroke) due to the difference in the pressure receiving area.
  • the sequential valve SV 1 is switched by the pressure of the C port, and the pressure of the C port is changed to the pilot valve PV, Lead to speed control valve SPV.
  • the pilot valve PV is not switched because the pressure in the C port increases due to the pressure loss and the pressure inside the hammer is high.
  • the speed control valve SPV is switched according to the difference in the pressure receiving area, thereby narrowing the moving passage of the high-pressure oil.
  • the main control valve MCV is switched by the spring force of ⁇ 8, and the C port and the drain 6 are communicated. As a result, the pressure in the chamber 14 above the impact piston becomes low, and the impact piston 1 starts to rise (return stroke).
  • the C port pressure acting on the speed control valve SPV escapes to the drain tank 14 so that the speed control valve is switched. SPV switches immediately. Since then The impact piston 1 rises to the position where PPG 1 is set to a high pressure, and repeats a reversal descent. When the impact piston 1 descends and drops to the position where the STV 1 G is lowered, the STV 1 is switched, shutting off the pilot passage for the PPG 1 power and the like, and the stroke selection valve. The passage from PPG 2 derived from STV 2 is the pilot passage. Therefore, after that, the impact piston 1 rises to the position where the pressure of the PPG 2 becomes high, and then repeats the reversal and descent.
  • the chisel portion 10 is automatically stored in the hammer body 7 in this way, the movement to the next crushed object can be performed very smoothly.
  • the oil in the air-cooled ACC is used to raise the impact piston 1, so that the pressure in the circuit is further reduced, and the initial state recovery valve IV is activated by the spring 9 of Baneka. Switch.
  • the stroke selection valve STV 1 and the stroke will be adjusted so that PPG 1 will again be the pilot pressure acquisition groove in the next operation.
  • the selection valve STV2 switches automatically and operates as described above.
  • the sequential valve STV1 and the sequential valve STV2 the same chisel discharge as the conventional machine is provided.
  • the speed control valve SPV prevents the overshoot of the impact piston 1, so the length of the large diameter portion of the impact piston 1 is set to a length corresponding to the initial stroke at the time of generation 0.
  • the entire length of the hammer can be shortened, and the weight can be reduced.
  • the hydraulically driven low-noise hammer of the present invention is not only compact and lightweight, but also excellent in workability and work efficiency, as compared with the conventional machine. Industrial applicability
  • the impact piston slidably provided in the hammer body is raised or lowered by switching the hydraulic pressure, and the object to be crushed is directly impacted by the chisel portion of the impact piston.
  • a pressurized oil flows in when the pedal is depressed to 0 N, and an operating pedal that shuts off the pressurized oil when the pedal is released to 0 FF. If it is set to 0 FF, the impact drum chisel is a hydraulically driven low-noise hammer equipped with a mechanism that is housed in the hammer body. The chisel part can be automatically stored in the hammer body, improving workability.
  • the present invention provides a hydraulic system having a manually operated block mechanism that locks the chisel portion of a striking piston to a maximum protruding position when drilling work is required.
  • the pressure-driven low-noise hammer locks the chisel of the impact piston at the maximum protruding position, improving workability during heavy work. And it became.
  • the present invention provides a stroke selection mechanism for switching the stroke stroke when the bite allowance of the chisel portion of the impact piston exceeds a certain value, and a different location.
  • This is a hydraulically driven low-noise hammer equipped with an initial state return mechanism that returns to the initial state when hitting again, so the required maximum stroke of the impact piston can be greatly reduced, and the impact Not only was it possible to minimize the number of reductions, but also the impact energy was stabilized.
  • the present invention provides a method for controlling the speed of a striking piston so that if the striking piston is accelerated to a predetermined stroke, it is not accelerated further. Since it is a hydraulically driven, low-noise hammer equipped with a control mechanism without using a tone, it has also been made lighter and more compact.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

La présente invention concerne un marteau hydraulique à faible bruit qui comprend : une pédale de commande (21) qui permet de faire circuler une huile comprimée lorsqu'on l'enfonce pour mettre en marche le marteau de l'invention, et d'interrompre la circulation de l'huile comprimée lorsqu'on la relâche pour arrêter le marteau ; et un mécanisme qui permet de stocker une partie burin (10) d'un piston frappeur dans un corps de marteau (7) lorsqu'on relâche la pédale de commande (2) pour arrêter le marteau, le piston frappeur (1) installé coulissant dans le corps de marteau étant levé ou abaissé par commutation de la pression hydraulique de sorte que la partie burin (10) du piston frappeur martèle directement un objet à broyer.
PCT/JP2002/000360 2002-01-18 2002-01-18 Marteau hydraulique a faible bruit WO2003061912A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2002/000360 WO2003061912A1 (fr) 2002-01-18 2002-01-18 Marteau hydraulique a faible bruit
JP2003561834A JPWO2003061912A1 (ja) 2002-01-18 2002-01-18 油圧駆動式低騒音ハンマ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2002/000360 WO2003061912A1 (fr) 2002-01-18 2002-01-18 Marteau hydraulique a faible bruit

Publications (1)

Publication Number Publication Date
WO2003061912A1 true WO2003061912A1 (fr) 2003-07-31

Family

ID=27590512

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/000360 WO2003061912A1 (fr) 2002-01-18 2002-01-18 Marteau hydraulique a faible bruit

Country Status (2)

Country Link
JP (1) JPWO2003061912A1 (fr)
WO (1) WO2003061912A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07216932A (ja) * 1994-01-28 1995-08-15 Okada Aiyon Kk 衝撃破砕工具を備えた油圧作業車両
JPH0976172A (ja) * 1995-09-14 1997-03-25 Furukawa Co Ltd 液圧式打撃機構
JPH1058350A (ja) * 1996-08-23 1998-03-03 Konan Denki Kk 油圧駆動式低騒音ハンマ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07216932A (ja) * 1994-01-28 1995-08-15 Okada Aiyon Kk 衝撃破砕工具を備えた油圧作業車両
JPH0976172A (ja) * 1995-09-14 1997-03-25 Furukawa Co Ltd 液圧式打撃機構
JPH1058350A (ja) * 1996-08-23 1998-03-03 Konan Denki Kk 油圧駆動式低騒音ハンマ

Also Published As

Publication number Publication date
JPWO2003061912A1 (ja) 2005-05-19

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