EP1299212A1 - Appareil hydraulique a percussions - Google Patents
Appareil hydraulique a percussionsInfo
- Publication number
- EP1299212A1 EP1299212A1 EP01954068A EP01954068A EP1299212A1 EP 1299212 A1 EP1299212 A1 EP 1299212A1 EP 01954068 A EP01954068 A EP 01954068A EP 01954068 A EP01954068 A EP 01954068A EP 1299212 A1 EP1299212 A1 EP 1299212A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- distribution box
- distribution
- chamber
- subjected
- 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
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
- B25D9/14—Control devices for the reciprocating piston
- B25D9/16—Valve arrangements therefor
- B25D9/20—Valve arrangements therefor involving a tubular-type slide valve
Definitions
- a hydraulic percussion device comprises a body, inside which is mounted a cylinder, in which is guided a striking piston driven alternately by an incompressible fluid and striking a tool retained at the lower end of the body.
- the distribution of the fluid ensuring the movement of the piston is carried out by a distributor housed in a distribution box mounted in the body.
- Document EP 0 638 01 3 relates to a percussion device, in which the cylinder of the striking piston and the various liners forming the cylinder ensuring the guiding of the latter and of the distributor are held in a body by an upper cover, itself fixed to the body by screws. These screws ensure mechanical locking of the different parts, but have the following drawbacks:
- the object of the invention is to provide a hydraulic percussion device, in which the various parts intended to be mounted in an enclosure of the body are not subjected to the constraints resulting from screw tightening, with the resulting drawbacks which have been defined above.
- the hydraulic percussion device that it concerns, comprising a body inside which is mounted a cylinder in which is guided a striking piston driven alternately by an incompressible fluid, and striking a tool retained at the lower end of the body, the distribution of the fluid ensuring the movement of the piston being carried out by a distributor housed in a distribution box mounted in the body, is characterized in that the cylinder and the distribution box are entirely contained in the enclosure enclosed by the body, in that the cylinder is in axial support on the body, in that the distribution box is mounted coaxially with the cylinder and bears mechanically on it and in that the surfaces perpendicular to it axis of the device, subjected to pressure, are arranged and dimensioned in such a way that the results of the hydraulic forces applied to the parts, cy lindre and distribution box, are directed in the same direction towards a support located in the body of the device, during all the phases of the cycle of operation of this one.
- this device also comprises a distribution cover arranged coaxially with the distribution box and bearing axially thereon, whose surfaces perpendicular to the axis of the device and subjected to the pressure are arranged and dimensioned in such a way that the result of the hydraulic forces applied to the cover is directed in the same direction as the result of the forces applied to the other parts, cylinder and distribution box, during all the phases of the operating cycle of the 'apparatus.
- the parts constituted by the cylinder, the distribution box and the distribution cover are not mechanically fixed by the body cover, as is usually the case,
- the value of the tightening of the cover on the body therefore has absolutely no influence on the behavior of the different parts inside the body, on the one hand, and relative to each other, on the other hand, since these parts are pressed against each other and against the body by hydraulic forces,
- the support of the body, against which the different parts are pushed hydraulically is constituted by the bottom of the enclosure, located on the side of the tool, in which the cylinder is mounted.
- each part, cylinder, distribution box, distribution cover has two opposing surfaces, the first of which is subjected alternately to high and low pressure and the second of which is larger than the first, is subjected permanently at high pressure.
- the end face of the cylinder pressing against the bottom of the enclosure of the body is at atmospheric pressure while its opposite face is always subjected to high pressure. The cylinder is thus pressed against the bottom of the enclosure of the body.
- the distribution box has two successive cylindrical sections, of which the one turned on the side of the piston is closed by a bottom delimiting with the piston a chamber connected alternately at high and at low pressure, and of which the other section, with a cross section greater than that of the first, is located in a chamber permanently supplied with high pressure fluid.
- the dispensing cover has a circular wall whose external face is in abutment against the internal face of the distribution box, whose internal face is used, in part, for guiding the dispenser, whose lower face partly delimits a chamber annular, which is permanently connected to the low pressure circuit, this circular wall ending in a portion of larger section, resting on the end of the distribution box and located in a chamber permanently supplied with high pressure fluid.
- the distribution cover has a circular wall whose external face is supported in a bore of the body, the lower face of which bears against the upper face of the distribution box, the internal face of which serves , in part, to guide the dispenser and delimits with it a chamber annular, which is permanently connected to the low pressure circuit, this circular wall ending,. at its upper end, by a portion of larger section, located in a chamber permanently supplied with high pressure fluid.
- Figure 1 is a longitudinal sectional view of an apparatus equipped with a first cylinder-distribution means assembly
- FIGS 2 to 6 are views in longitudinal section of five alternative embodiments of the apparatus of Figure 1.
- the apparatus shown in FIG. 1 comprises a body 1, in which is axially formed a cavity serving to house a cylinder 2 coming to bear against the bottom 5 of the cavity situated on the side of a striking tool 40.
- the cylinder 2 is used for alternately guiding a striking piston 22 intended during each operating cycle to strike the head of the tool 40.
- a box distribution 3 in the upper end of which is mounted a distribution cover 4.
- a distributor 23 which acts on the supply of the device with incompressible fluid to cause an alternating movement piston.
- the striking piston 22 delimits with its cylinder two opposing chambers, a lower annular chamber 13 always subjected to the high pressure HP coming from the channel 1 7 and an upper chamber 1 2 is alternately subjected to the high and to the low pressure by the intermediate of the distributor 23 so that the result of the pressures exerted on the striking piston is successively in one direction then in the other.
- the distribution box defines with the cylinder an annular chamber 6 always subjected to low pressure via the channel 1 6.
- the distributor 23 defines with the distribution box 3 an annular chamber 14 called control which is alternately in communication with high (HP) and low pressure (BP) depending on the position of the striking piston 22.
- the distributor 23, the distribution box 3, the distribution cover 4 delimit an annular chamber 1 5 always subjected to low pressure via the channel 1 6.
- the balance of the distribution cover 4 is simple, insofar as the surface 7 delimiting the chamber 1 5 is systematically at the pressure BP, and the pressure HP in the chamber 26 is exerted on the surface opposite to the latter, thus keeping the cover 4 hydraulically pushed down.
- the latter is subjected to high pressure on its surface 24 (area S 24 ), the surface 6 (area S 6 ) delimited by the distribution box 3 and the cylinder 2 is always subjected to the pressure BP, the surface 20 (area S 2 ⁇ ) delimited by the chamber 1 5 is always subjected to the pressure BP, the surface 21 (area S 21 ) delimited by the annular chamber 14 is alternately subjected to the HP and the BP, the surface 25 (area S 25 ) is always subjected to the HP pressure, the surface 1 8 (area S 1 B ) forming the bottom of the box, and delimited by the upper chamber 1 2 and the body 2 is alternately subject to HP and BP.
- F R (S 24 xHP) + (S 20 xBP) + (S 21 xBP) + (S 26 xHP) -
- the distribution box is therefore kept hydraulically pushed down by the result of the forces applied.
- F B (HP - BP) (S 24 + S 21 + S 25 - S 18 + S 7 - S 4 or
- the distribution box In all phases of operation, the distribution box is therefore constantly maintained hydraulically pushed towards the cylinder.
- the cylinder is therefore still held hydraulically, pushed down from the body 1 by the result of the forces applied.
- Figures 2, 3, 4 and 5 show variants of the device of Figure 1, in which the displacement of the upper driving chamber of the striking piston 22 has been reduced by adding an additional chamber which may be, as appropriate , connected to atmospheric pressure or to the pressure of the low pressure return circuit, so that its action on the resultant of the forces applied to the piston is negligible.
- a motor chamber with a reduced volume makes it possible to obtain high frequencies while maintaining the same input flow, the overall power being maintained by increasing the working pressure.
- the balance of the distribution box is modified since the chamber 27 delimits a surface 29 which reduces the effect of the surface 1 8 in FIG. 1. Since this surface 29 is always subjected to low pressure, the distribution box will undergo an even greater result of downward forces than in the case of FIG. 1.
- the equilibrium of cylinder 2 with respect to FIG. 1 follows the evolution of the force F B.
- Figure 3 shows an alternative embodiment of the device of Figure 2, where the chamber 27 is replaced by a chamber 30 defining a surface 32 of the distribution box still subject to atmospheric pressure.
- the upper drive chamber 35 is no longer annular and delimits a surface 36 on the distribution box 3, while an annular chamber 33 is created and is delimited by the striking piston 22, the cylinder 1 and the distribution box 3.
- the chamber 33 is constantly connected to the return circuit BP by the channel 34, and the surface 38 which it delimits has the function of 'increase the result of the forces which plate down the distribution box, without changing the balance of the cylinder 2 and the cover 4.
- Figure 5 shows a variant of the apparatus of Figure 4, where the chamber 33 is replaced by a chamber 37 delimiting a surface
- FIG. 6 represents a variant applicable to the devices of FIGS. 2, 3, 4 and 5, where the distribution cover 4 is this time guided directly into the cylinder 2 instead of the distribution box 3.
- the different surfaces of the distribution cover and the distribution box are arranged in such a way that the results of the forces applied to them are always directed downwards.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Actuator (AREA)
- Fish Paste Products (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0009260 | 2000-07-13 | ||
FR0009260A FR2811602B1 (fr) | 2000-07-13 | 2000-07-13 | Appareil hydraulique a percussions |
PCT/FR2001/002227 WO2002006013A1 (fr) | 2000-07-13 | 2001-07-10 | Appareil hydraulique a percussions |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1299212A1 true EP1299212A1 (fr) | 2003-04-09 |
EP1299212B1 EP1299212B1 (fr) | 2008-04-23 |
Family
ID=8852519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01954068A Expired - Lifetime EP1299212B1 (fr) | 2000-07-13 | 2001-07-10 | Appareil hydraulique a percussions |
Country Status (18)
Country | Link |
---|---|
US (1) | US6829975B2 (fr) |
EP (1) | EP1299212B1 (fr) |
JP (1) | JP2004504167A (fr) |
KR (1) | KR100758673B1 (fr) |
CN (1) | CN1284653C (fr) |
AT (1) | ATE392996T1 (fr) |
AU (1) | AU7642301A (fr) |
BR (1) | BR0112446A (fr) |
CA (1) | CA2415358A1 (fr) |
DE (1) | DE60133739T2 (fr) |
DK (1) | DK1299212T3 (fr) |
ES (1) | ES2301556T3 (fr) |
FR (1) | FR2811602B1 (fr) |
IL (2) | IL153852A0 (fr) |
NO (1) | NO319455B1 (fr) |
PT (1) | PT1299212E (fr) |
WO (1) | WO2002006013A1 (fr) |
ZA (1) | ZA200210249B (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE528743C2 (sv) * | 2005-06-22 | 2007-02-06 | Atlas Copco Rock Drills Ab | Slagverk för bergborrmaskin, förfarande för åstadkommande av en fram- och återgående slagkolvrörelse och bergborrmaskin |
FR2916377B1 (fr) * | 2007-05-25 | 2009-07-24 | Montabert Soc Par Actions Simp | Procede de protection contre les suralimentations en debit d'un appareil a percussions mu par un fluide incompressible sous pression, et appareil pour la mise en oeuvre de ce procede. |
ATE542617T1 (de) * | 2009-06-03 | 2012-02-15 | Feintool Ip Ag | Vorrichtung und verfahren zum verhindern des bruchs eines werkzeugs beim feinschneiden und/oder umformen eines werkstücks |
CN101927479B (zh) * | 2009-06-23 | 2014-10-22 | 蒙塔博特公司 | 液压冲击设备 |
CN101927478B (zh) * | 2009-06-23 | 2015-03-04 | 蒙塔博特公司 | 液压冲击设备 |
KR101373544B1 (ko) * | 2012-07-03 | 2014-03-25 | 이일재 | 유압타격장치용 타격몸체 |
CN109281604B (zh) * | 2018-11-16 | 2024-05-24 | 启东环宇智能设备制造有限公司 | 一种液压破碎用打击机芯和液压破碎锤 |
CN110219334B (zh) * | 2019-04-02 | 2024-05-14 | 台州贝力特机械有限公司 | 一种液压破碎锤 |
KR102317232B1 (ko) * | 2020-01-08 | 2021-10-22 | 주식회사 현대에버다임 | 유압 브레이커 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA941264A (en) * | 1970-04-03 | 1974-02-05 | Etablissements Montabert | Dispositif de commande du distributeur d'un appareil a percussions mu par un liquide sous pression |
FR2369908A1 (fr) * | 1976-11-08 | 1978-06-02 | Montabert Roger | Appareil a percussions hydraulique |
JPS5835420Y2 (ja) * | 1979-04-18 | 1983-08-09 | 日本ニユ−マチツク工業株式会社 | 衝撃動工具の弁装置 |
DE3400302A1 (de) * | 1984-01-03 | 1985-08-29 | Mannesmann AG, 4000 Düsseldorf | Hydraulisch betaetigte schlagvorrichtung |
SE9201340L (sv) | 1992-04-29 | 1993-10-30 | Berema Atlas Copco Ab | Slående maskin |
FI107891B (fi) * | 1998-03-30 | 2001-10-31 | Sandvik Tamrock Oy | Painenestekäyttöinen iskulaite |
-
2000
- 2000-07-13 FR FR0009260A patent/FR2811602B1/fr not_active Expired - Fee Related
-
2001
- 2001-07-10 AT AT01954068T patent/ATE392996T1/de not_active IP Right Cessation
- 2001-07-10 DE DE60133739T patent/DE60133739T2/de not_active Expired - Lifetime
- 2001-07-10 BR BR0112446-3A patent/BR0112446A/pt active Search and Examination
- 2001-07-10 JP JP2002511934A patent/JP2004504167A/ja active Pending
- 2001-07-10 CN CNB018127231A patent/CN1284653C/zh not_active Expired - Fee Related
- 2001-07-10 DK DK01954068T patent/DK1299212T3/da active
- 2001-07-10 PT PT01954068T patent/PT1299212E/pt unknown
- 2001-07-10 KR KR1020037000215A patent/KR100758673B1/ko active IP Right Grant
- 2001-07-10 EP EP01954068A patent/EP1299212B1/fr not_active Expired - Lifetime
- 2001-07-10 AU AU7642301A patent/AU7642301A/xx not_active Withdrawn
- 2001-07-10 US US10/297,178 patent/US6829975B2/en not_active Expired - Lifetime
- 2001-07-10 CA CA002415358A patent/CA2415358A1/fr not_active Abandoned
- 2001-07-10 ES ES01954068T patent/ES2301556T3/es not_active Expired - Lifetime
- 2001-07-10 IL IL15385201A patent/IL153852A0/xx unknown
- 2001-07-10 WO PCT/FR2001/002227 patent/WO2002006013A1/fr active IP Right Grant
-
2002
- 2002-12-18 ZA ZA200210249A patent/ZA200210249B/en unknown
-
2003
- 2003-01-08 IL IL153852A patent/IL153852A/en not_active IP Right Cessation
- 2003-01-10 NO NO20030124A patent/NO319455B1/no not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0206013A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE60133739T2 (de) | 2009-05-14 |
DK1299212T3 (da) | 2008-08-11 |
US20030183402A1 (en) | 2003-10-02 |
NO20030124L (no) | 2003-03-04 |
DE60133739D1 (de) | 2008-06-05 |
CN1284653C (zh) | 2006-11-15 |
IL153852A (en) | 2009-05-04 |
WO2002006013A1 (fr) | 2002-01-24 |
NO20030124D0 (no) | 2003-01-10 |
EP1299212B1 (fr) | 2008-04-23 |
ES2301556T3 (es) | 2008-07-01 |
AU7642301A (en) | 2002-01-30 |
ZA200210249B (en) | 2003-10-31 |
US6829975B2 (en) | 2004-12-14 |
CN1441716A (zh) | 2003-09-10 |
FR2811602A1 (fr) | 2002-01-18 |
KR20030031955A (ko) | 2003-04-23 |
CA2415358A1 (fr) | 2002-01-24 |
ATE392996T1 (de) | 2008-05-15 |
FR2811602B1 (fr) | 2002-10-11 |
JP2004504167A (ja) | 2004-02-12 |
BR0112446A (pt) | 2003-06-24 |
IL153852A0 (en) | 2003-07-31 |
KR100758673B1 (ko) | 2007-09-13 |
NO319455B1 (no) | 2005-08-15 |
PT1299212E (pt) | 2008-05-20 |
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