EP1299213A1 - Appareil hydraulique a percussions - Google Patents
Appareil hydraulique a percussionsInfo
- Publication number
- EP1299213A1 EP1299213A1 EP01954069A EP01954069A EP1299213A1 EP 1299213 A1 EP1299213 A1 EP 1299213A1 EP 01954069 A EP01954069 A EP 01954069A EP 01954069 A EP01954069 A EP 01954069A EP 1299213 A1 EP1299213 A1 EP 1299213A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- distribution box
- chamber
- distributor
- channel
- 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 percussion device comprises a body containing a cylinder, inside which is slidably mounted a striking piston of a tool, hydraulically driven alternately by an incompressible fluid.
- the movement of the piston is controlled by a distributor which opens and closes hydraulic circuits putting certain chambers located on either side of the piston successively in communication with a high pressure circuit and a low pressure circuit to create this alternating sequence movement.
- Document US 4,230,019 relates to a percussion device comprising several bodies, respectively a main body including the striking piston, a body containing the distribution system and a body containing an energy accumulator.
- the arrangement of these different bodies is such that the power circuits making it possible to pass the fluid flow rates necessary for activating the striking movement, and the more dimly dimensioned control circuits, which ensure the movement of the dispenser, are provided both in the body containing the cylinder and in the body containing the distributor.
- control channels are formed both in the body containing the cylinder and in the body containing the dispenser, which requires the creation of a seal between these two bodies.
- the distribution body is positioned laterally, so that it must be securely held due to the accelerations it undergoes resulting from shock waves. It is also known to position a distribution block above the body containing the cylinder, which requires the drilling of long holes in the body containing the cylinder to connect the various circuits, which results in an increase in the cost of production. and an increase in line pressure drops.
- the object of the invention is to provide a hydraulic percussion device, the distributor control system of which is produced in a simple manner, and with a reduced bulk.
- the hydraulic percussion device that it concerns, comprising a body containing a cylinder inside which is slidably mounted a striking piston of a tool, hydraulically driven alternately by an incompressible fluid, the movement of the piston being controlled by a distributor which, arranged coaxially with the striking piston, is mounted inside a distribution box, is characterized in that:
- the distribution box comprises a part which interferes axially with the piston and is arranged concentrically therewith, and
- the distribution box defines with the piston a pilot chamber which, successively set to high and low pressure of the fluid, is in communication by a channel formed in the distribution box with a chamber for controlling the movement of the distributor, to create in it alternately a low pressure and a high pressure and, consequently, a sequenced inversion of the resultant of the forces applied to the distributor.
- the connecting channels of the control chamber, with the high pressure and low pressure circuits, are provided in the distribution box.
- This hydraulic percussion device has a compact structure, since there is an overlap of the distribution box and the cylinder containing the piston.
- the structure of this device is simplified, insofar as the control and piloting circuits of the distribution assembly are independent of the cylinder body and are provided in the distribution box. Thus, only the power circuits necessary for the movement of the striking piston are machined in the cylinder body. It can be noted that the same distribution system can equip different types of percussion devices.
- the upper end of the piston has a central and axial bore in which is engaged a central and axial cylindrical bearing belonging to the distribution box, the bore of the piston comprising a recess annular delimiting with the cylindrical bearing of the distribution box, the piloting chamber.
- the upper end of the piston has a central and axial cylindrical bearing which is engaged in a central and axial bore formed in the distribution box, the cylindrical bearing of the piston comprising an annular groove delimiting with the central bore of the distribution box, the piloting chamber.
- the device comprises a lower chamber formed between the lower end of the distribution box and the piston, permanently connected to the low pressure network by a channel, and a channel which, opening radially into the bore ensuring the sliding of the piston relative to the distribution box, above the communication channel of the pilot chamber and the distributor control chamber, is permanently connected to the high pressure network, the movement of the piston relative to the distribution box successively putting the pilot chamber in communication with the lower chamber connected to the high pressure network and the channel connected to the low pressure network.
- the supply channel of the lower chamber, as well as the channel connected to the low pressure network, are provided in the distribution box.
- Figures 1 to 4 are four views in longitudinal section of this device during four operating phases
- Figure 5 is a longitudinal sectional view of a second embodiment.
- the apparatus shown in Figures 1 to 4 comprises a piston 1 slidably mounted inside a cylinder formed in a body 2. During its reciprocating movement, the piston is intended to strike against the upper end of a tool O.
- the body 2 contains, above the piston 1, a distribution box 3.
- the piston 1 has a central and axial bore 4 inside which is engaged a cylindrical bearing 5 belonging to the distribution box 3.
- the piston defines with its cylinder and with the distribution box 3 at least three chambers:
- the frequency of the device can be chosen according to the choice of surfaces of the different sections. This choice determines, for a stroke of the striking piston, the displacement of the device and consequently its striking frequency for a given feed rate.
- the reciprocating movement of the piston is obtained by communication of the driving chamber 6 alternately with the high pressure network 9 and the low pressure network 12, so that the result of the hydraulic forces applied to the piston 1 is exerted successively in one direction and in the other.
- the bore of the piston has an annular recess or groove defining with the cylindrical surface of the distribution box an annular pilot chamber 13. Depending on the position of the piston relative to the cylindrical surface 5 of the distribution box, it is it is possible to establish a communication from a control chamber 14 of the movement of the distributor 15 via a channel 16 and from the control chamber 13 either with the high pressure network 9 or with the low pressure network 12.
- the cylindrical bearing surface of the distribution box 3 comprises a channel 17 for bringing the lower chamber 10 into communication with the low pressure network 12, as well as a channel 18 opening radially into the bore 4, above of the pilot chamber 13, connected to the high pressure network 9.
- the distributor 15 delimits three chambers with the distribution box 12 and the cover 19:
- the distributor 15 is animated by a downward movement when the control chamber 14 is connected to the low pressure circuit 12 and an upward movement when the latter communicates with the high pressure circuit 9.
- the reciprocating movement of the distributor 15 is obtained by communication from the control chamber 14 alternately with the high pressure circuit 9 and the low pressure circuit 12, so that, depending on the surfaces chosen for the sections of the three chambers 14, 19, 22, the resulting force applied to the distributor is successively exerted in one direction and in the other.
- the initial state is that shown in FIG. 1, in which the distributor 15 is in the low position and the piston 1 is in the low position.
- the control chamber 14 being connected to the low pressure circuit via channel 16, from the pilot chamber 13, of the lower chamber 10 and of the channel 17.
- the result of the forces applied to the striking piston causes the latter to rise, since the driving chamber 6 is connected to the low pressure circuit via a channel 23 and of the annular groove 22.
- the edge 26 of the piston discovers the opening of the channel 18 connected to the high pressure, thus establishing communication from the high pressure circuit to the control channel 16 and the control chamber 14 via the control chamber 13.
- the control chamber 14 of the distributor 15 is then at high pressure, so that the result of the forces applied to the distributor causes the latter to rise, as shown in FIG. 3.
- the edge 27 of the distributor 13 discovers the edge 28 of the distribution box 3 and establishes communication between the high pressure fluid coming from the circuit 9 and from the central chamber 20 with the channel 23 and the driving chamber 6.
- the control circuit 14, 16 of the distributor is isolated from the high pressure and placed in communication with the low pressure circuit, via the pilot chamber 13 and the lower chamber 10. The result of the forces applied to the distributor is then directed downwards and the distributor begins its downward movement. Simultaneously, the striking piston 1 reaches its impact zone.
- the distributor establishes a communication between the low pressure circuit 12 and the driving chamber 6.
- the impact piston and the distributor are then in the low position, shown in FIG. 1, and the working cycle can start again.
- FIG. 5 represents an alternative embodiment of this device, in which the same elements are designated by the same references as above.
- the overlap of the distribution box 3 and the striking piston 1 results from the fact that the striking piston has a central cylindrical bearing 34 which is engaged in a central bore 35 formed in the distribution box 3.
- the bearing cylindrical 34 has an annular groove delimiting the pilot chamber 36.
- the lower chamber 10 is then no longer a central chamber but an annular chamber.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Fluid-Pressure Circuits (AREA)
- Fish Paste Products (AREA)
- Electrophonic Musical Instruments (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0009259 | 2000-07-13 | ||
| FR0009259A FR2811601B1 (fr) | 2000-07-13 | 2000-07-13 | Appareil hydraulique a percussions |
| PCT/FR2001/002228 WO2002006014A1 (fr) | 2000-07-13 | 2001-07-10 | Appareil hydraulique a percussions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1299213A1 true EP1299213A1 (fr) | 2003-04-09 |
| EP1299213B1 EP1299213B1 (fr) | 2007-10-24 |
Family
ID=8852518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01954069A Expired - Lifetime EP1299213B1 (fr) | 2000-07-13 | 2001-07-10 | Appareil hydraulique a percussions |
Country Status (18)
| Country | Link |
|---|---|
| US (1) | US6901842B2 (fr) |
| EP (1) | EP1299213B1 (fr) |
| JP (1) | JP2004504168A (fr) |
| KR (1) | KR100753929B1 (fr) |
| CN (1) | CN100436073C (fr) |
| AT (1) | ATE376482T1 (fr) |
| AU (2) | AU7642401A (fr) |
| BR (1) | BR0112347A (fr) |
| CA (1) | CA2415359A1 (fr) |
| DE (1) | DE60131081T2 (fr) |
| DK (1) | DK1299213T3 (fr) |
| ES (1) | ES2295186T3 (fr) |
| FR (1) | FR2811601B1 (fr) |
| IL (2) | IL153493A0 (fr) |
| NO (1) | NO318421B1 (fr) |
| PT (1) | PT1299213E (fr) |
| WO (1) | WO2002006014A1 (fr) |
| ZA (1) | ZA200209846B (fr) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE527762C2 (sv) * | 2004-10-14 | 2006-05-30 | Atlas Copco Rock Drills Ab | Slagverk |
| SE529615C2 (sv) * | 2006-02-20 | 2007-10-09 | Atlas Copco Rock Drills Ab | Slagverk och bergborrmaskin samt förfarande för att styra slagkolvens slaglängd |
| CN100436751C (zh) * | 2006-05-25 | 2008-11-26 | 中国海洋石油总公司 | 水下液压冲击铲 |
| 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. |
| SK932007A3 (sk) | 2007-07-09 | 2009-02-05 | Konek, S. R. O. | Hydraulické rozrušovacie kladivo |
| US9656377B2 (en) * | 2014-08-08 | 2017-05-23 | Caterpillar Inc. | Self-charging hydraulic hammer |
| US12358113B2 (en) * | 2023-02-01 | 2025-07-15 | Caterpillar Inc. | Hydraulic hammer internal damping |
| CN118774580B (zh) * | 2024-08-28 | 2025-03-14 | 启东市玖盛液压设备有限公司 | 一种液压旋转冲击设备的液压动力分配方法 |
Family Cites Families (11)
| 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 |
| JPS5217266B2 (fr) * | 1971-10-27 | 1977-05-14 | ||
| FI50307C (fi) * | 1974-04-20 | 1976-02-10 | Xandor Ag | Hydraulisesti käytetty iskulaite |
| FR2369908A1 (fr) * | 1976-11-08 | 1978-06-02 | Montabert Roger | Appareil a percussions hydraulique |
| ES464093A1 (es) * | 1977-11-12 | 1978-12-16 | Luis Miguel Castejon Castan | Perfeccionamientos en los sistemas de fluidos alternantes y aparato para su realizacion. |
| JPS597570A (ja) * | 1982-07-05 | 1984-01-14 | 北越工業株式会社 | 油圧作動衝撃工具 |
| DE3400302A1 (de) * | 1984-01-03 | 1985-08-29 | Mannesmann AG, 4000 Düsseldorf | Hydraulisch betaetigte schlagvorrichtung |
| JPH03208571A (ja) * | 1990-01-12 | 1991-09-11 | Maruzen Kogyo Kk | 油圧ピックハンマ |
| FR2676953B1 (fr) * | 1991-05-30 | 1993-08-20 | Montabert Ets | Appareil hydraulique a percussions. |
| FR2727891B1 (fr) * | 1994-12-08 | 1997-01-24 | Montabert Ets | Procede et appareil pour la regulation de la course de frappe d'un appareil a percussion mu par un fluide incompressible sous pression |
| FI107891B (fi) * | 1998-03-30 | 2001-10-31 | Sandvik Tamrock Oy | Painenestekäyttöinen iskulaite |
-
2000
- 2000-07-13 FR FR0009259A patent/FR2811601B1/fr not_active Expired - Fee Related
-
2001
- 2001-07-10 AU AU7642401A patent/AU7642401A/xx active Pending
- 2001-07-10 PT PT01954069T patent/PT1299213E/pt unknown
- 2001-07-10 ES ES01954069T patent/ES2295186T3/es not_active Expired - Lifetime
- 2001-07-10 DE DE60131081T patent/DE60131081T2/de not_active Expired - Fee Related
- 2001-07-10 KR KR1020037000214A patent/KR100753929B1/ko not_active Expired - Fee Related
- 2001-07-10 DK DK01954069T patent/DK1299213T3/da active
- 2001-07-10 CN CNB018125662A patent/CN100436073C/zh not_active Expired - Fee Related
- 2001-07-10 EP EP01954069A patent/EP1299213B1/fr not_active Expired - Lifetime
- 2001-07-10 WO PCT/FR2001/002228 patent/WO2002006014A1/fr not_active Ceased
- 2001-07-10 JP JP2002511935A patent/JP2004504168A/ja active Pending
- 2001-07-10 CA CA002415359A patent/CA2415359A1/fr not_active Abandoned
- 2001-07-10 US US10/297,326 patent/US6901842B2/en not_active Expired - Fee Related
- 2001-07-10 IL IL15349301A patent/IL153493A0/xx active IP Right Grant
- 2001-07-10 AU AU2001276424A patent/AU2001276424B2/en not_active Ceased
- 2001-07-10 AT AT01954069T patent/ATE376482T1/de not_active IP Right Cessation
- 2001-07-10 BR BR0112347-5A patent/BR0112347A/pt active Search and Examination
-
2002
- 2002-12-04 ZA ZA200209846A patent/ZA200209846B/en unknown
- 2002-12-16 IL IL153493A patent/IL153493A/en not_active IP Right Cessation
-
2003
- 2003-01-10 NO NO20030125A patent/NO318421B1/no not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0206014A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| IL153493A (en) | 2006-07-05 |
| US20040050243A1 (en) | 2004-03-18 |
| ZA200209846B (en) | 2003-10-03 |
| US6901842B2 (en) | 2005-06-07 |
| AU7642401A (en) | 2002-01-30 |
| CA2415359A1 (fr) | 2002-01-24 |
| FR2811601A1 (fr) | 2002-01-18 |
| NO318421B1 (no) | 2005-03-14 |
| ES2295186T3 (es) | 2008-04-16 |
| WO2002006014A1 (fr) | 2002-01-24 |
| DE60131081D1 (de) | 2007-12-06 |
| DK1299213T3 (da) | 2008-03-03 |
| PT1299213E (pt) | 2007-11-26 |
| BR0112347A (pt) | 2003-07-01 |
| FR2811601B1 (fr) | 2002-10-11 |
| CN1441715A (zh) | 2003-09-10 |
| IL153493A0 (en) | 2003-07-06 |
| AU2001276424B2 (en) | 2006-02-02 |
| ATE376482T1 (de) | 2007-11-15 |
| KR20030031954A (ko) | 2003-04-23 |
| NO20030125L (no) | 2003-03-04 |
| CN100436073C (zh) | 2008-11-26 |
| NO20030125D0 (no) | 2003-01-10 |
| JP2004504168A (ja) | 2004-02-12 |
| DE60131081T2 (de) | 2008-07-24 |
| KR100753929B1 (ko) | 2007-08-31 |
| EP1299213B1 (fr) | 2007-10-24 |
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