EP1108504A1 - Outil à moteur - Google Patents

Outil à moteur Download PDF

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Publication number
EP1108504A1
EP1108504A1 EP00124983A EP00124983A EP1108504A1 EP 1108504 A1 EP1108504 A1 EP 1108504A1 EP 00124983 A EP00124983 A EP 00124983A EP 00124983 A EP00124983 A EP 00124983A EP 1108504 A1 EP1108504 A1 EP 1108504A1
Authority
EP
European Patent Office
Prior art keywords
locking
tool according
sleeve
tool
hand
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
Application number
EP00124983A
Other languages
German (de)
English (en)
Other versions
EP1108504B1 (fr
Inventor
Helmut Wanek
Markus Heckmann
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1108504A1 publication Critical patent/EP1108504A1/fr
Application granted granted Critical
Publication of EP1108504B1 publication Critical patent/EP1108504B1/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
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B25D17/084—Rotating chucks or sockets
    • B25D17/088—Rotating chucks or sockets with radial movable locking elements co-operating with bit shafts specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/003—Details relating to chucks with radially movable locking elements
    • B25D2217/0038—Locking members of special shape
    • B25D2217/0049—Roll-shaped locking members

Definitions

  • the invention is based on a hand machine tool the preamble of claim 1.
  • EP 0 456 003 B1 describes a striking hand drill known with a rotatably driven tool holder.
  • the tool holder has a base body and one in it arranged mounting hole for drilling and impact tools, in which a jaw chuck as the first tool holder and one separate second tool holder for tools with one Groove shaft are arranged.
  • the second tool holder has a radially displaceable locking body in the Form of a locking ball that is closed at the end of the shaft Grooves of the tools can be inserted and by one within axially movable locking sleeve and a holding sleeve is held in its locked position.
  • the locking sleeve is over the holding sleeve with a spring towards it Locked position charged.
  • the locking element covers the ball radially and the holding sleeve secures the ball with a protrusion axial direction.
  • the ball When inserting the tool, the ball is replaced by the Shank end of the tool in a longitudinal slot in the direction of insertion postponed.
  • the holding sleeve is at its projection moved over the ball against the spring. Between the locking element and the holding sleeve creates a free space in which the ball can dodge radially outwards.
  • the tool can be introduced. Then the preload moves Spring the holding sleeve in its initial position and presses the ball into the groove of the tool.
  • the invention is based on a hand machine tool, in particular from a rotary hammer, with a rotating one Tool holder for holding tools with a grooved shank, the at least one radially displaceable locking body has, which in a closed at the shaft end Groove of the tool is insertable and by a locking element is held in its locking position.
  • the locking element in a the locking body radially releasing position by a Locked connection held and in at least one spring Is loaded towards its locked position. It can be constructive simply an at least partially automated locking can be achieved with particularly long locking bodies, by avoiding axial movement of the locking body is. Is the locking element by the locking connection in the Locking body held radially releasing position, the tool can be inserted and removed without the locking body must be moved axially.
  • long locking bodies can save turning elements or advantageously supported in their function. Wear on the rotary driving elements can be reduced and the lifespan can be increased.
  • the the locking element loading spring is also used to advantage Keep locking element in its locked position, creating additional Locking agent can be saved.
  • the locking connection can be done with a partially automated locking the locking body via an actuating element be solved, for example via a push button that follows an insertion of a tool is actuated.
  • the snap connection has at least one in the Locking body releasing position of the locking element component projecting into a receiving area of the tool holder, via the snap connection when inserting the tool is solvable. It can be very comfortable with few components can be achieved.
  • Ensuring operation is advantageously a translational Unlocking movement of an actuator via Gear translated into a rotary motion.
  • the gear can by various, appear to the expert as meaningful constructive solutions can be realized, for example via a rack and pinion gear, etc.
  • Control element via a cam mechanism with the locking element connected in terms of effectiveness can be a particularly inexpensive and space-saving construction can be achieved.
  • the control element with a driving sleeve the locking element is connected which gives additional degrees of freedom can be created.
  • the driving sleeve in Direction of the locking position of the locking element rotatably and in Direction of the releasing position of the locking element rotatable connected to the actuator can with the actuator via the driving sleeve to unlock the locking body an actuating torque can be transmitted.
  • the driving sleeve during operation Contact of the actuator with an object, for example with masonry, can rotate in the control element.
  • the Actuator can rotate when in contact with an object Tool holder held and wear of the Control element can be largely avoided.
  • the locking body can be different, the person skilled in the art have designs that appear reasonable, in particular can the design is specifically designed for high torque transmission be, for example with a trapezoidal cross-section etc. However, to use standard tools if possible to be able, the locking body is advantageous from a Roll formed, which is also manufactured particularly inexpensively can be.
  • Fig. 1 is a tool holder 10 of an impact drill for holding tools with a grooved shank 12 shown in longitudinal section.
  • the tool holder 10 has a base body 54 on which to a processing side a clamping ring 56 and a retaining cap 58 a rubber cap 60 is attached.
  • a base body 54 In the base body 54 are in recesses 62, 64 two radially displaceable locking bodies 14, 16 arranged, each in a closed at the shaft end 18 Groove 20, 108 of the tools can be inserted and from one unlockable locking sleeve 22 in its locked position are held (Fig. 3).
  • the locking sleeve 22 is the locking body 14, 16 releasing position via a locking connection 28 held and via a torsion spring 30 in the direction 44 their locked position loaded (Fig. 1, 2 and 4), the Locking sleeve 22 for unlocking the locking bodies 14, 16 each with a recess 24, 26 over the locking body 14, 16 is rotatable.
  • the torsion spring 30 is on a first End in the direction of rotation in a groove 90 of the Base body 54 engaging projection 92 rotatably and in the axial Direction supported on a sleeve 66 and engages positively at a second end with a projection 68 into one Recess 70 of the locking sleeve 22.
  • the locking sleeve 22 is in their angle of rotation is limited by a ball 102 which in a Groove 104 in the base body 54 and in a recess 106 in the Locking sleeve 22 is guided (Fig. 2).
  • the locking connection 28 has a pin 34 in which the Locking body 14, 16 releasing position of the Locking sleeve 22 in a receiving area 32 of the tool holder 10 protrudes.
  • the locking connection 28 is via the pin 34 detachable when inserting the tool.
  • the pin 34 engages its locking position (FIG. 1) with a projection 72 positively in a recess 74 of the locking sleeve 22.
  • Der Pin 34 is in the radial direction inwards via an annular spring 76 loaded against which the pin 34 when loosening the Locking connection 28 through the tool shank 12 radially outwards can be moved.
  • the tool holder 10 is for producing an idle or a drive connection axially displaceable and which have locking bodies 14, 16 designed as rollers the length of the grooves 20, 108 in the groove shaft 12 (Fig. 3).
  • the locking sleeve 22 is connected via a cam mechanism 38 Driving sleeve 42 connected, wherein a cam member 40 of the cam mechanism 38 in the form of an oblique groove in an outer periphery of the locking sleeve 22 is introduced in the projections 52 formed on the driving sleeve 42 are.
  • the driving sleeve 42 is in the axial direction over a Stop 48 connected to an adjusting sleeve 36, the driving sleeve 42 with a coil spring 78 with the stop 48 against a radially inwardly extending collar 80 of the Adjustment sleeve 36 is pressed.
  • the coil spring 78 is included supported by a ring 84 on a shoulder 86 of the base body 54, the ring 84 a spring space 110 of the coil spring 78 radially on the adjusting sleeve 36 via a seal 88 seals to the outside.
  • the driving sleeve 42 is in the direction 44 of Locked position of the locking sleeve 22 with the adjusting sleeve 36 rotatably via a toothing 50 molded onto the stop 48 connected, the projections formed on the adjusting sleeve 36 82 engages (Fig. 4).
  • the adjusting sleeve 36 and the driving sleeve 42 are rotatable interconnected, namely the teeth 50 in Direction 46 of the releasing position via the projections 82 slide. If the adjusting sleeve 36 comes during operation, for example in contact with masonry, the Rotate the driving sleeve 42 relative to the adjusting sleeve 36, the shown execution for a counter-clockwise rotating tool is designed.
  • the locking sleeve 22 Before a tool is inserted, the locking sleeve 22 by the locking connection 28 in its releasing position held.
  • the locking body 14, 16 When inserting the tool, the locking body 14, 16 radially outwards through the shaft end 18 pushed into the recesses 24, 26 (Fig. 1 and 2).
  • the locking body 14, 16 After further insertion of the tool over the grooves 20, 108, with the Shaft end 18 of the pin 34 radially outwards against the ring spring 76 pressed.
  • the protrusion 72 of the pin 34 is made the recess moved, the locking sleeve 22 is through the Torsion spring 30 rotates and fixes the locking body 14, 16 in the radial direction in the grooves 20, 108 of the groove shaft 12 (Fig. 3).
  • Rotary driving elements 94, 96 in 18 open to the shaft end Longitudinal grooves 98, 100 introduced.
  • the adjusting sleeve 36 with the Driving sleeve 42 with a translational movement axially in Direction of the hammer drill against the coil spring 78 drawn.
  • the translational movement is via the cam mechanism 38 translated into a rotational movement and on the Transfer locking sleeve 22.
  • the driving sleeve 42 is over the teeth 50 in the direction 44 of the locked position on the Adjusting sleeve 36 supported.
  • the locking sleeve 22 also rotates the recesses 24, 26 via the locking bodies 14, 16.
  • the pin 34 is through the ring spring 76 with its projection 72 pressed into the recess 74 and holds the locking sleeve 22 in their releasing position. Then the tool with its groove shaft 12 in the axial direction from the Receiving area 32 pulled, the locking body 14, 16 radially outward through the shaft end 18 into the recesses 24, 26 pressed.
EP20000124983 1999-12-17 2000-11-16 Outil à moteur Expired - Lifetime EP1108504B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19960951 1999-12-17
DE1999160951 DE19960951A1 (de) 1999-12-17 1999-12-17 Handwerkzeugmaschine

Publications (2)

Publication Number Publication Date
EP1108504A1 true EP1108504A1 (fr) 2001-06-20
EP1108504B1 EP1108504B1 (fr) 2007-06-13

Family

ID=7933064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000124983 Expired - Lifetime EP1108504B1 (fr) 1999-12-17 2000-11-16 Outil à moteur

Country Status (2)

Country Link
EP (1) EP1108504B1 (fr)
DE (2) DE19960951A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2395158A (en) * 2002-11-14 2004-05-19 Black & Decker Inc Tool Holder for a Rotary Hammer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4626146A (en) * 1984-04-16 1986-12-02 Hilti Aktiengesellschaft Tool holder for a drilling or a chiseling device
EP0456003A1 (fr) * 1990-05-08 1991-11-13 Robert Bosch Gmbh Perceuse manuelle
US5971403A (en) * 1996-12-13 1999-10-26 Hitachi Koko Co., Ltd. Holding device for percussion tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4626146A (en) * 1984-04-16 1986-12-02 Hilti Aktiengesellschaft Tool holder for a drilling or a chiseling device
EP0456003A1 (fr) * 1990-05-08 1991-11-13 Robert Bosch Gmbh Perceuse manuelle
US5971403A (en) * 1996-12-13 1999-10-26 Hitachi Koko Co., Ltd. Holding device for percussion tool

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2395158A (en) * 2002-11-14 2004-05-19 Black & Decker Inc Tool Holder for a Rotary Hammer
GB2395158B (en) * 2002-11-14 2005-11-16 Black & Decker Inc Tool holder for a rotary hammer
US7338051B2 (en) 2002-11-14 2008-03-04 Black & Decker Inc. Tool holder for a rotary hammer

Also Published As

Publication number Publication date
EP1108504B1 (fr) 2007-06-13
DE19960951A1 (de) 2001-06-28
DE50014406D1 (de) 2007-07-26

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