EP0876881B1 - Appareil de forage et/ou percussion - Google Patents

Appareil de forage et/ou percussion Download PDF

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Publication number
EP0876881B1
EP0876881B1 EP98810143A EP98810143A EP0876881B1 EP 0876881 B1 EP0876881 B1 EP 0876881B1 EP 98810143 A EP98810143 A EP 98810143A EP 98810143 A EP98810143 A EP 98810143A EP 0876881 B1 EP0876881 B1 EP 0876881B1
Authority
EP
European Patent Office
Prior art keywords
appliance
accordance
abutment shoulder
abutment
working
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
EP98810143A
Other languages
German (de)
English (en)
Other versions
EP0876881A2 (fr
EP0876881A3 (fr
Inventor
Helmut Nussrainer
Jens Frenzel
Hans-Werner Bongers-Ambrosius
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 EP0876881A2 publication Critical patent/EP0876881A2/fr
Publication of EP0876881A3 publication Critical patent/EP0876881A3/fr
Application granted granted Critical
Publication of EP0876881B1 publication Critical patent/EP0876881B1/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
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/12—Means for driving the impulse member comprising a crank mechanism
    • B25D11/125—Means for driving the impulse member comprising a crank mechanism with a fluid cushion between the crank drive and the striking body
    • 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
    • B25D2250/035—Bleeding holes, e.g. in piston guide-sleeves

Definitions

  • the invention relates to a drilling and / or chiseling device according to the preamble of patent claim 1.
  • a drilling and / or chiseling device with a guide tube wherein a piston of a striking mechanism and a racket are arranged axially displaceable in the guide tube. Between the piston and the racket, the guide tube has a radially extending air passage, which can be closed by a relative to the guide tube axially displaceable control body.
  • a device according to the preamble of claim 2 is also known from DE 3743333 A.
  • the drilling or chiseling tool and guided in the housing striker and cooperating with the striker control body relative to the housing of the device moves against the processing direction until the control body comes after closing the air passage at a pointing in the machining direction stop edge of the housing to the plant.
  • the air passage should be released as quickly as possible so that the pistons in the interior of the guide tube are no longer pressurized and the club, striker and drill or chisel tool are no longer in the machine direction can put off.
  • a quick release of the air passage is achieved by the control body is moved as quickly as possible in the machining direction to its original position.
  • control body Since the entire contact force is transmitted via the control body to the housing, the control body must be made very solid and have a very high strength, resulting in a high dead weight.
  • the high weight of the spring and the control body has a negative effect on the overall weight of the device. Due to the high total weight, the handling of the device is poor and there is a fast fatigue of the operator.
  • the invention has for its object to provide a drilling and / or chiselling device, which has a low overall weight, is easy to use, economical to manufacture and safe to use.
  • the co-operating with the first stop shoulder of the anvil control body has a low strength and a low weight.
  • the individual parts of the control are, for example, very thin-walled and have little Dimensions. Since the control body according to the invention has a very low weight, it can also be displaced parallel to the machining direction with very little force. When springing the device from a ground for the displacement of the control body provided in the machining direction spring has a low spring force and a low weight. The fact that the spring and the individual parts of the control body have a low weight, a device with a low weight can be created.
  • the second stop shoulder projects radially beyond the first stop shoulder.
  • the device In order to keep the total weight of the device as low as possible and thus the device has as few individual parts as possible, advantageously cooperating with the second stop shoulder stop surface part of the guide tube.
  • the second stop shoulder and the stop surface are expediently designed as circular ring surfaces.
  • the annular surface of the second stop shoulder are expediently conical, tapering counter to the machining direction and the annular surface of the abutment surface conical, formed enlarging in the machining direction.
  • control body is preferably formed by a shift fork, a shift rod and a shift sleeve, wherein the cooperating with the first stop shoulder stop of the control body is formed by the shift fork.
  • the weight of the control is kept very small by advantageously the shift fork and the shift rod are integrally formed.
  • a guide of the shift rod parallel to the machining direction for example, in at least one slot-like, extending parallel to the machining direction opening of the guide tube through which the shift fork protrudes into the interior of the guide tube.
  • the thickness measured perpendicular to the machining direction of at least the Shift rod corresponds for example substantially the wall thickness of the guide tube.
  • the shift rod and the shift sleeve are advantageously formed in one piece.
  • the mass forces of the control body can be kept very small and thus a very fast back and forth movement of the control body is possible
  • the control body is preferably at least partially made of plastic.
  • control body is expediently at least partially made of aluminum.
  • the drilling and / or chiseling device shown schematically in FIG. 1 has a housing 1 with a handle 3, a switch 4, a tool holder 2 for a tool, not shown, and an electric cable 5, via which the device can be connected to an external power source is.
  • FIGS. 2 to 3 In the interior of the drilling and / or chiseling device is shown in FIGS. 2 to 3 extending parallel to the machining direction guide tube 9 with pointing in the machine direction first free end and the first free end opposite the second free end.
  • the piston 7 of a striking mechanism 6, not shown In the guide tube 9, the piston 7 of a striking mechanism 6, not shown, is arranged axially displaceable.
  • the piston 7 is connected via a bolt 8 with a connecting rod in connection, which projects beyond the second free end of the guide tube 9 against the machining direction.
  • the guide tube 9 has a plurality of radially extending air passages 10, which are arranged between the piston 7 and the racket 21 and via which the pressure of an air cushion which can be built up by the piston 7 can be influenced.
  • the control of these air passages 10 by means of the control body, which is composed of a shift fork 15, 35, a shift rod 14, 34 and a shift sleeve 13, 33.
  • a stop 30 of the shift fork 15, 35 cooperates with a first stop shoulder 18 of the striker 17.
  • the second stop shoulder 19 of the striker 17 bears against an abutment surface 20, which is fixedly connected to the guide tube 9 in a fixed manner. Between the second stop shoulder 19 and the stop surface 20, for example, a damping element 29 is arranged.
  • the striker 17 When lifting the device from a machined surface, not shown, the striker 17 is offset from the racket 21 in the machine direction.
  • there is a displacement of the control body in the machining direction by means of a on the shift sleeve 13, 33 of the control body and a bush 11 supporting the spring 12.
  • the bush 11 is pressed into a receiving bore of the housing 1 and is supported against the machining direction via a radially enlarged collar on Peripheral region of the receiving bore of the housing 1 from.
  • the shift sleeve 13 is sleeve-like and surrounds a portion of the circumference of the guide tube 9 in the air passages 10.
  • the cooperating with the striker 17 shift fork 15 and the shift rod 14 are formed as a one-piece component and positively with the Shift sleeve 13 connected.
  • the component is designed as a wire bracket.
  • a first end of the wire hanger is shaped as a ring and projects into a circumferentially formed recess of the switching sleeve 13.
  • Another portion of the wire bracket protrudes substantially perpendicularly from the plane formed by the ring and the second end of the wire hanger is bent at right angles and extends parallel to the ring plane.
  • the wire thickness corresponds essentially to the wall thickness of the guide tube 9 in Area of an opening 16 through which a part of the component projects into the interior of the guide tube 9.
  • the trained as a wire bracket component is made for example of steel and the shift sleeve made of steel, plastic or aluminum.
  • the striker 17 arranged between the racket 21 and the first free end of the guide tube 9 is limitedly displaceable in the machining direction due to a damping ring 23 arranged in the guide tube 9.
  • the damping ring 23 is supported against the machining direction on a pointing in the machining direction shoulder of the guide tube 9 and in the machining direction of a locking ring 24 which protrudes partially into a circumferentially formed groove of the guide tube 9.
  • the circumference of the striker 17 is provided with two peripherally formed depressions, in each of which an O-shaped sealing ring 22 is arranged.
  • a ball bearing 26 On the outside of the guide tube 9 is a part of the entire storage of the guide tube 9 in the form of a ball bearing 26, which is supported against the machining direction on an outer shoulder of the guide tube 9 and in the machining direction on an axially fixed to the guide tube 9 arranged securing ring 25. Contrary to the machining direction joins to the outer shoulder a pressed onto the guide tube 9 gear 27, which cooperates with a drive mechanism, not shown, which ensures that the guide tube 9 performs a rotational movement during the processing of a substrate and a clamped in the tool holder 2 Tool set in rotation.
  • the switching sleeve 33 and shift rod 34 are formed as a one-piece component, which is in positive connection with the shift fork 35.
  • the shift fork 35 is plate-shaped and has a central through hole, which serves to receive a first abutment shoulder 18 of the striker 17 against the processing direction superior approach.
  • the shift fork 35 has a stop 30, which is in contact with the first stop shoulder 18.
  • the component is formed substantially sleeve-shaped, and has in the region of the shift fork 35 has two diametrically opposite receiving openings into which the two free ends of the shift fork 35 can engage positively.
  • the with the second stop shoulder 19 of the striker 17 cooperating abutment surface 20 is formed by the striker guide 28, which is axially fixed, for example by means of a press connection with the guide tube 9 in connection.
  • the shift fork 35 and the component are made for example of steel, plastic or aluminum.
  • the device is in a rest position, not shown, then the striker 17 abuts the damping ring 23 and the spring 12 presses the control body in the machine direction, so that the air passages 10 are not covered by the control body.
  • An axial displacement of the striker 17 is not possible, since a pressure in the interior of the guide tube 9 between the piston 7 and the racket 21 can not be established.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)

Claims (10)

  1. Outil de forage et/ou de burinage, avec un mécanisme de percussion (6) dont le piston (7), par l'intermédiaire d'un coussin d'air, déplace en va-et-vient un percuteur (21) guidé dans un tube de guidage (9), le tube de guidage (9) étant pourvu, entre le piston (7) et le percuteur (21), d'au moins un passage d'air radial (10), et le percuteur (21) coopérant avec une bouterolle (17) guidée dans le carter (1) de l'outil, et avec un corps de commande qui sert à la commande du passage d'air (10) et qui, par l'intermédiaire d'une butée (30), coopère avec un premier épaulement de butée (18) de la bouterolle (17) orienté à l'opposé de la direction de travail et est déplaçable par rapport au tube de guidage (9) à l'opposé de la direction de travail à l'encontre de la force d'un ressort (12), caractérisé en ce que la bouterolle (17) comporte un second épaulement de butée (19) qui est distant du premier épaulement de butée (18) dans la direction de travail et est orienté à l'opposé de la direction de travail et qui coopère avec une surface de butée (20) en liaison axiale avec le tube de guidage (9) et orientée dans la direction de travail, la distance entre le premier épaulement de butée (18) et le second épaulement de butée (19) étant supérieure à la distance entre la butée (30) et la surface de butée (20).
  2. Outil selon la revendication 1, caractérisé en ce que le second épaulement de butée (19) dépasse radialement du premier épaulement de butée (18).
  3. Outil selon la revendication 1 ou 2, caractérisé en ce que la surface de butée (20) coopérant avec le second épaulement de butée (19) fait partie du tube de guidage (9).
  4. Outil selon une des revendications 1 à 3, caractérisé en ce que le second épaulement de butée (19) et la surface de butée (20) sont conformées en surfaces annulaires.
  5. Outil selon la revendication 4, caractérisé en ce que la surface annulaire du second épaulement de butée (19) est de forme conique et se rétrécit à l'opposé de la direction de travail, et la surface annulaire de la surface de butée (20) est de forme conique et s'élargit dans la direction de travail.
  6. Outil selon une des revendications 1 à 5, caractérisé en ce que le corps de commande est formé par une fourchette de commutation (15, 35), par une tige de commutation (14, 34) et par un manchon de commutation (13, 33), la butée (30) du corps de commande qui coopère avec le premier épaulement de butée (18) étant formée par la fourchette de commutation (15, 35).
  7. Outil selon la revendication 6, caractérisé en ce que la fourchette de commutation (15) et la tige de commutation (14) sont réalisées d'un seul tenant.
  8. Outil selon la revendication 6, caractérisé en ce que la tige de commutation (34) et le manchon de commutation (33) sont réalisés d'un seul tenant.
  9. Outil selon une des revendications 6 à 8, caractérisé en ce que le corps de commande est réalisé au moins partiellement en matière plastique.
  10. Outil selon une des revendications 1 à 8, caractérisé en ce que le corps de commande est réalisé au moins partiellement en aluminium.
EP98810143A 1997-04-07 1998-02-23 Appareil de forage et/ou percussion Expired - Lifetime EP0876881B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19714287 1997-04-07
DE19714287A DE19714287A1 (de) 1997-04-07 1997-04-07 Bohr- und/oder Meisselgerät

Publications (3)

Publication Number Publication Date
EP0876881A2 EP0876881A2 (fr) 1998-11-11
EP0876881A3 EP0876881A3 (fr) 2002-11-27
EP0876881B1 true EP0876881B1 (fr) 2006-08-23

Family

ID=7825676

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98810143A Expired - Lifetime EP0876881B1 (fr) 1997-04-07 1998-02-23 Appareil de forage et/ou percussion

Country Status (5)

Country Link
US (1) US5992541A (fr)
EP (1) EP0876881B1 (fr)
JP (1) JPH10309680A (fr)
CN (1) CN1066380C (fr)
DE (2) DE19714287A1 (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19929183B4 (de) * 1999-06-25 2004-07-29 Wacker Construction Equipment Ag Luftfederschlagwerk mit Hohl-Schlagkolben mit Leerlauföffnung
DE19955412A1 (de) * 1999-11-18 2001-05-23 Hilti Ag Bohr- und Meisselgerät
USD466780S1 (en) 2000-03-16 2002-12-10 Black & Decker Inc. Hammer drill
DE10019071A1 (de) * 2000-04-18 2001-10-25 Hilti Ag Elekrohandwerkzeuggerät mit Leerschlagabschaltung
DE10103996C1 (de) * 2001-01-30 2002-10-02 Wacker Werke Kg Luftfederschlagwerk für einen Schlag- und/oder Bohrhammer mit kurz bauendem Antriebskolben
EP1607187B1 (fr) * 2004-06-18 2010-04-28 HILTI Aktiengesellschaft Appareil pour l'amélioration de la réponse en coupure d'un outil électropneumatique à percussion
USD527601S1 (en) 2005-02-10 2006-09-05 Black & Decker Inc. Hammer
USD540642S1 (en) 2005-02-10 2007-04-17 Black & Decker Inc. Hammer
USD524626S1 (en) 2005-02-10 2006-07-11 Black & Decker Inc. Hammer
DE102006000395A1 (de) * 2006-08-07 2008-02-14 Hilti Ag Handwerkzeugmaschine mit pneumatischem Schlagwerk
DE102006060320A1 (de) * 2006-12-20 2008-06-26 Robert Bosch Gmbh Schlagwerk für eine Handwerkzeugmaschine
DE102007000081A1 (de) * 2007-02-08 2008-08-21 Hilti Ag Handwerkzeugmaschine mit pneumatischem Schlagwerk
US9216502B2 (en) 2008-04-03 2015-12-22 Black & Decker Inc. Multi-stranded return spring for fastening tool
US8534527B2 (en) 2008-04-03 2013-09-17 Black & Decker Inc. Cordless framing nailer
US9399281B2 (en) 2012-09-20 2016-07-26 Black & Decker Inc. Stall release lever for fastening tool
US9346158B2 (en) 2012-09-20 2016-05-24 Black & Decker Inc. Magnetic profile lifter
CN102966673A (zh) * 2012-12-04 2013-03-13 普光新高（北京）技术开发有限公司 一种电气隔离转轴装置
EP2821183B1 (fr) 2013-07-05 2017-06-21 Black & Decker Inc. Marteau perforateur
EP2857149A1 (fr) * 2013-10-03 2015-04-08 HILTI Aktiengesellschaft Machine-outil manuelle
EP4126463A4 (fr) * 2020-04-02 2024-05-08 Milwaukee Electric Tool Corporation Outil électrique
US11833652B2 (en) * 2022-01-25 2023-12-05 Hilti Aktiengesellschaft Power tool
US12427638B2 (en) 2022-12-20 2025-09-30 Milwaukee Electric Tool Corporation Percussion tool

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3662843A (en) * 1970-01-29 1972-05-16 Gen Dynamics Corp Impact tools
DE2641070A1 (de) * 1976-09-11 1978-03-16 Bosch Gmbh Robert Motorisch angetriebener schlaghammer mit luftfederung
EP0052507B1 (fr) * 1980-11-18 1985-02-13 Black & Decker Inc. Perceuse à percussion
DE3304916A1 (de) * 1983-02-12 1984-08-16 Robert Bosch Gmbh, 7000 Stuttgart Bohrhammer
DE3429140A1 (de) * 1984-08-08 1986-02-20 Black & Decker Inc., Newark, Del. Bohrhammer mit einem pneumatischen schlagwerk
DE3743333A1 (de) * 1987-12-21 1989-07-06 Bosch Gmbh Robert Motorisch angetriebener meissel- oder bohrhammer
DE3826213A1 (de) * 1988-08-02 1990-02-15 Bosch Gmbh Robert Bohr- oder schlaghammer
DE3932134A1 (de) * 1989-09-27 1991-04-04 Bosch Gmbh Robert Hammer mit luftfederschlagwerk
DE4239294A1 (de) * 1992-11-23 1994-05-26 Black & Decker Inc Bohrhammer mit pneumatischem Schlagwerk
JP3292969B2 (ja) * 1995-08-18 2002-06-17 株式会社マキタ ハンマードリル

Also Published As

Publication number Publication date
CN1066380C (zh) 2001-05-30
EP0876881A2 (fr) 1998-11-11
DE19714287A1 (de) 1998-10-08
DE59813693D1 (de) 2006-10-05
EP0876881A3 (fr) 2002-11-27
US5992541A (en) 1999-11-30
JPH10309680A (ja) 1998-11-24
CN1197717A (zh) 1998-11-04

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