EP0888851B1 - Appareil de forage - et/ou de percussion - Google Patents

Appareil de forage - et/ou de percussion Download PDF

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Publication number
EP0888851B1
EP0888851B1 EP98810564A EP98810564A EP0888851B1 EP 0888851 B1 EP0888851 B1 EP 0888851B1 EP 98810564 A EP98810564 A EP 98810564A EP 98810564 A EP98810564 A EP 98810564A EP 0888851 B1 EP0888851 B1 EP 0888851B1
Authority
EP
European Patent Office
Prior art keywords
drilling direction
elastic ring
drilling
tool according
transmission element
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.)
Expired - Lifetime
Application number
EP98810564A
Other languages
German (de)
English (en)
Other versions
EP0888851A3 (fr
EP0888851A2 (fr
Inventor
Peter Gerold
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Publication of EP0888851A2 publication Critical patent/EP0888851A2/fr
Publication of EP0888851A3 publication Critical patent/EP0888851A3/fr
Application granted granted Critical
Publication of EP0888851B1 publication Critical patent/EP0888851B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/003—Clutches specially adapted therefor

Definitions

  • the innovation relates to a drilling and / or chiseling device according to the preamble of the protection claim 1.
  • a device which has a hammer mechanism with a guide cylinder and a tool holder.
  • the guide cylinder serves to receive and guide a driven by a wobble gear percussion piston and a percussion piston driven air piston.
  • an anvil In an opposite end of the drilling direction of a central bore of the tool holder an anvil is guided axially displaceable.
  • the drilling direction-side end of the striker cooperates in the operation of the device with a male end of a tool used in the tool holder.
  • the end region of the striker which extends counter to the drilling direction, is cylindrical and has a reduced diameter.
  • This end region passes through a damping element which is arranged between a pointing in the direction of drilling stop of the guide cylinder and a counter to the drilling direction facing stop surface of the striker.
  • the damping element is used for rebound damping of the striker and is composed of a co-operating with the striker stop plate, a supported on the stop of the guide cylinder transmission element and arranged between the stopper plate and the transmission element elastic ring.
  • the stop of the guide cylinder is formed by a locking element in the form of a securing ring, which projects on the inside of the guide cylinder in a circumferentially formed recess.
  • US Pat. No. 5,099,926 discloses a drilling and / or chiseling device with a tool holder, a percussion mechanism with a guide cylinder and a stop element of the guide cylinder pointing in the direction of drilling, and a stop surface of a stopper guided in the tool holder.
  • the damping element opposite to the drilling direction arranged one behind the other has a stop disc, an elastic ring and a transmission element, wherein the transmission element has a receiving the stop disc and the elastic ring serving receiving area.
  • the innovation is based on the object to provide a mounting-friendly drilling and / or chiseling device, in which the damping element can be installed or removed quickly, easily and economically.
  • the solution of this task is carried out by a drilling and / or chiseling device, which has the features listed in the characterizing portion of claim 1 protection.
  • the receiving area formed according to the innovation serves to receive and guide the elastic ring and the stop disc.
  • the arrangement of these two parts in the receiving area easy assembly of a unit forming damping element is achieved because instead of three individual parts only a single part must be inserted into the guide cylinder.
  • the spring characteristic of the damping element can be influenced by the elastic ring is set in the receiving region of the transmission element under bias. In this way, an increased damping force is already at the beginning of the axial compression of the elastic ring.
  • the transmission element of the damping element serves to receive and the large-area transmission of the rebound energy emanating from the striker on the elastic ring.
  • the stop disc co-operating with the striker is preferably axially displaceable in the receiving region of the transfer element in an axially limited manner parallel to the drilling direction.
  • the axial boundary of the stop disc and the determination of the elastic ring by means of a form-fitting cooperating with the transmission element locking element.
  • the insertion and the setting of the stop disc and the elastic ring in the receiving area of the transmission element can be done outside the drilling and chiseling device, so that the damping element can be used as a unit in the drilling and chiseling device.
  • the locking element is formed by a projecting into a circumferentially formed recess of the receiving area retaining ring.
  • circlips are available as standardized components in the trade.
  • the receiving area is advantageously limited by the inner wall of the cup-shaped transmission element.
  • the stop disc and the elastic ring are arranged within the receiving area.
  • the guide of the stopper plate and the elastic ring can be made over the peripheral regions, preferably corresponds to the inner diameter of the receiving area substantially the outer diameter of the stop plate and the elastic ring.
  • the receiving region may have a somewhat larger inner diameter, so that an expansion of the elastic ring in the radial direction is possible if it is axially loaded during rebounding of the striker.
  • a good damping of the striker is achieved by means of a damping element whose elastic ring is strongly compressible parallel to the drilling direction and has a good elastic deformation behavior in the radial direction.
  • the elastic ring expediently has a substantially elliptical cross section, wherein the largest diameter of the cross section extends parallel to the drilling direction.
  • the outer diameter corresponds substantially to the inner diameter of the protruding into the circumferentially formed recess of the receiving area retaining ring and whose extension is parallel to the drilling direction greater than the measured parallel to the drilling direction width of the retaining ring.
  • a coaxial alignment of the stop disc with respect to a drilling direction opposite pointing, circumferentially trained, tapered in the bore direction stop surface of the striker upon collision of these two components is achieved in that the stop disc on the drilling direction side end side of the guide portion has a conical, at least partially circumferentially formed stop shoulder, the expanding in the direction of drilling.
  • the drilling and / or chiseling device shown in FIG. 1 has a housing 2, on which a handle 6 and a switch 61 are located in an end region facing the direction of drilling.
  • a handle 6 and a switch 61 are located in an end region facing the direction of drilling.
  • the handle 6 protrudes substantially perpendicularly from the housing 2 from an electric cable 5, which connects an electric motor, not shown, in the housing 2 via the switch 61 with an external power source.
  • a tool holder 1 is arranged, which serves to receive a drilling and chisel tool, not shown.
  • the tool holder 1 is connected by means of a flange 3 axially to the housing 2.
  • the connection between the flange 3 and the housing 2 by means of several screw connections, not shown.
  • Between the tool holder 1 and the handle 6 is a side handle 4, which projects laterally from the housing 2 and is mounted on a cylindrical portion of the housing 2.
  • the tool holder 1 has a counter to the drilling direction extending end portion having a central bore in which an anvil 9 is axially displaceable.
  • the free end of the end portion of the tool holder 1 has a radial extension with an annular surface facing in the drilling direction, via which the tool holder 1 by means of a flange 3 on the housing 2 of the drilling and chiseling device is axially fixed. Screw connections between the flange 3 and the housing 2 are not shown.
  • a damping element 8 connects directly to the end region of the tool holder 1, which is axially penetrated by a tapered, opposite to the drilling direction extending, cylindrical end portion 91 of the striker 9.
  • the damping element 8 is used for rebound damping of the striker 9 and is composed of a cup-shaped transmission element 81 with an open in the drilling direction receiving area, an axially limited displaceable in the receiving area stop plate 86 and an elastic ring 83 between the stop plate 86 and the transmission element 81st
  • the receiving area is bounded by the inner wall 82 of the cup-shaped transmission element 81 and the outer diameter of the stop plate 86 and the elastic ring 83 substantially correspond to the inner diameter of the receiving area.
  • the receiving region has a larger diameter, so that a radial deformation of the elastic ring 83 can take place when it is loaded axially.
  • the stop disc 86 and the elastic ring 83 are fixed by means of a locking element 84 in the form of a retaining ring in the receiving area, wherein the elastic ring 83 may be biased, for example.
  • the securing ring protrudes into a circumferentially formed recess, which is arranged on the inner wall 82 of the receiving area.
  • the indentation is located at the bore end portion of the receiving area. From the stop disc 86 protrudes in the drilling direction from a guide portion 85, whose outer diameter substantially corresponds to the inner diameter of the protruding into the circumferentially formed recess of the receiving portion retaining ring and whose extension is parallel to the drilling direction greater than the measured parallel to the boring direction width B of the retaining ring.
  • the guide region of the stop disc 86 prevents bouncing or knocking out of the retaining ring from the recess of the receiving area.
  • the elastic ring 83 is made of an elastic material such as rubber.
  • the stop disc 86 has at the drilling direction side end side of the guide portion a conical, at least partially circumferentially formed stop shoulder 87, which widens in the drilling direction and cooperates with a circumferentially extending, expanding in the drilling direction stop surface 92 of the striker 9.
  • the damping element 8 is arranged in a bore-direction-side cylindrical receiving region and is supported against the drilling direction on a stop 74 formed by the end face of a guide cylinder 73.
  • the guide cylinder 73 belongs to a striking mechanism 7, not shown in its entirety, of which a percussion piston 71 and a flying piston 72 are also shown.
  • the damping element 8 can be arranged, for example, axially displaceable in the bore-direction-side, cylindrical receiving region of the guide cylinder 73, if this is arranged, for example, also axially displaceable in the housing 2.
  • the guide cylinder 73 has radially extending through openings 75, which serve to vent the striking mechanism 7 during operation of the device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Claims (9)

  1. Outil de forage et/ou de burinage comprenant un mandrin d'outil (1), un mécanisme de percussion (7) avec un cylindre de guidage (73) et avec un élément amortisseur (8) disposé entre une butée (74) du cylindre de guidage (73) tournée dans la direction de forage et une surface de butée (92), tournée à l'opposé de la direction de forage, d'une bouterolle (9) guidée dans le mandrin d'outil (1), l'élément amortisseur (8) comportant une rondelle de butée (86), un anneau élastique (83) et un élément de transmission (81) disposés les uns derrière les autres à l'opposé de la direction de forage, l'élément de transmission (81) comportant une zone réceptrice servant à recevoir la rondelle de butée (86) et l'anneau élastique (83), caractérisé en ce que l'anneau élastique (83) est immobilisé sous précontrainte dans la zone réceptrice de l'élément de transmission (81).
  2. Outil selon la revendication 1, caractérisé en ce que la rondelle de butée (86) est disposée dans la zone réceptrice de l'élément de transmission (81) avec une possibilité de déplacement axial limité parallèlement à la direction de forage.
  3. Outil selon la revendication 1 ou 2, caractérisé en ce que la limitation axiale de la rondelle de butée (86) et l'immobilisation de l'anneau élastique (83) sont réalisées au moyen d'un élément de verrouillage (84) coopérant par complémentarité de formes avec l'élément de transmission (81).
  4. Outil selon la revendication 3, caractérisé en ce que l'élément de verrouillage (84) est formé par un circlip pénétrant dans un renfoncement périphérique de la zone réceptrice.
  5. Outil selon une des revendications 1 à 4, caractérisé en ce que la zone réceptrice est limitée par la paroi intérieure (82) de l'élément de transmission conformé en pot (81).
  6. Outil selon la revendication 5, caractérisé en ce que le diamètre intérieur de la zone réceptrice en forme de pot correspond sensiblement au diamètre extérieur de la rondelle de butée (86) et de l'anneau élastique (83).
  7. Outil selon une des revendications 1 à 6, caractérisé en ce que l'anneau élastique (83) possède une section transversale sensiblement elliptique, le plus grand diamètre de la section transversale s'étendant parallèlement à la direction de forage.
  8. Outil selon la revendication 4, caractérisé en ce que de la rondelle de butée (86) dépasse, dans la direction de forage, une zone de guidage (85) dont le diamètre extérieur correspond sensiblement au diamètre intérieur du circlip pénétrant dans le renfoncement périphérique de la zone réceptrice et dont l'extension parallèlement à la direction de forage est supérieure à la largeur (B) du circlip mesurée parallèlement à la direction de forage.
  9. Outil selon la revendication 8, caractérisé en ce que, sur la face frontale de la zone de guidage (85) tournée dans la direction de forage, la rondelle de butée (86) comporte un épaulement de butée conique au moins en partie continu (87) qui s'étend dans la direction de forage.
EP98810564A 1997-07-04 1998-06-19 Appareil de forage - et/ou de percussion Expired - Lifetime EP0888851B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29711704U 1997-07-04
DE29711704U DE29711704U1 (de) 1997-07-04 1997-07-04 Bohr- und/oder Meißelgerät

Publications (3)

Publication Number Publication Date
EP0888851A2 EP0888851A2 (fr) 1999-01-07
EP0888851A3 EP0888851A3 (fr) 2003-01-08
EP0888851B1 true EP0888851B1 (fr) 2006-11-08

Family

ID=8042581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810564A Expired - Lifetime EP0888851B1 (fr) 1997-07-04 1998-06-19 Appareil de forage - et/ou de percussion

Country Status (4)

Country Link
US (1) US5996708A (fr)
EP (1) EP0888851B1 (fr)
JP (1) JP4195125B2 (fr)
DE (2) DE29711704U1 (fr)

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ES2208623T3 (es) 2001-03-07 2004-06-16 Black & Decker Inc. Martillo.
CN1329164C (zh) 2001-09-17 2007-08-01 密尔沃基电动工具公司 旋转锤
GB2401570B (en) * 2003-05-12 2006-07-05 Black & Decker Inc Spindle assembly for hammer drill
DE10323606B4 (de) * 2003-05-20 2005-04-14 Robert Bosch Gmbh Elastische Döpperführung
DE602004026665D1 (de) * 2003-08-06 2010-06-02 Hitachi Koki Kk Schlagbohrer
TWM293826U (en) * 2006-01-10 2006-07-11 Shuen Tai Prec Entpr Co Ltd Portable power hammer chisel having shock absorbing guiding sleeve
EP2029326A1 (fr) * 2006-06-06 2009-03-04 Robert Bosch GmbH Mécanisme de percussion avec un percuteur et un dispositif d'arrêt affecté
US7726413B2 (en) 2006-07-01 2010-06-01 Black & Decker Inc. Tool holder for a powered hammer
JP2008012664A (ja) 2006-07-01 2008-01-24 Black & Decker Inc ハンマードリル用の潤滑油ポンプ
US7413026B2 (en) 2006-07-01 2008-08-19 Black & Decker Inc. Lubricant system for powered hammer
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US10380058B2 (en) 2016-09-06 2019-08-13 Oracle International Corporation Processor core to coprocessor interface with FIFO semantics
US10783102B2 (en) 2016-10-11 2020-09-22 Oracle International Corporation Dynamically configurable high performance database-aware hash engine
US10176114B2 (en) 2016-11-28 2019-01-08 Oracle International Corporation Row identification number generation in database direct memory access engine
US10459859B2 (en) 2016-11-28 2019-10-29 Oracle International Corporation Multicast copy ring for database direct memory access filtering engine
US10725947B2 (en) 2016-11-29 2020-07-28 Oracle International Corporation Bit vector gather row count calculation and handling in direct memory access engine
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Also Published As

Publication number Publication date
US5996708A (en) 1999-12-07
JPH1177558A (ja) 1999-03-23
DE59813790D1 (de) 2006-12-21
EP0888851A3 (fr) 2003-01-08
EP0888851A2 (fr) 1999-01-07
JP4195125B2 (ja) 2008-12-10
DE29711704U1 (de) 1997-09-04

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