EP1536925A2 - Outil et porte-outil con us pour une machine-outil portative - Google Patents

Outil et porte-outil con us pour une machine-outil portative

Info

Publication number
EP1536925A2
EP1536925A2 EP03750292A EP03750292A EP1536925A2 EP 1536925 A2 EP1536925 A2 EP 1536925A2 EP 03750292 A EP03750292 A EP 03750292A EP 03750292 A EP03750292 A EP 03750292A EP 1536925 A2 EP1536925 A2 EP 1536925A2
Authority
EP
European Patent Office
Prior art keywords
section
tool
tool holder
cross
locking means
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.)
Withdrawn
Application number
EP03750292A
Other languages
German (de)
English (en)
Inventor
Otto Baumann
Dietmar Saur
Michael Knuth
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 EP1536925A2 publication Critical patent/EP1536925A2/fr
Withdrawn legal-status Critical Current

Links

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
    • B25D2217/0034—Details of shank profiles
    • 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
    • B25D2217/0042—Ball-shaped locking members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/907—Tool or Tool with support including detailed shank

Definitions

  • the present invention relates to a tool and a tool holder for a
  • the shaft of the tool 2 having axially successively arranged sections with different cross-sectional sizes, which form contact surfaces for corresponding sections in the tool holder, the first section with the smaller cross-section having rotary driving means and means for axial locking, which are provided with corresponding means in the tool holder Rotational entrainment and for the axial locking of the tool can be brought into operative connection, the rotational entrainment and locking means being arranged parallel to one another in the axial direction of the shank and serially to one another in the shank circumferential direction.
  • a tool holder for a rotary hammer which is driven to rotate and strike.
  • the tool holder has a holding body which is driven in rotation by a machine coupled to the tool holder and into which the shank of a tool can be inserted.
  • rotary driving means which serve to rotate the
  • rotary driving means usually consist of axially extending strips which are arranged in the receiving bore of the receiving body and which engage in grooves which are embedded in the shank of the tool. Furthermore, there are locking means in the tool holder, which cause the tool shank in axial
  • Usual locking means consist of at least one locking ball, which is arranged in an opening in the receiving body of the tool body and can be inserted into a recess embedded in the shank of the tool. In the locking position, the locking ball is covered radially on the outside by a locking sleeve. The locking sleeve is axially displaceably mounted on the receiving body.
  • the locking sleeve can be guided axially in the direction of insertion of the tool against the force of a prestressed spring into an unlocking position by means of an actuating sleeve, in which a space in the locking sleeve allows the locking ball to escape radially from the recess in the tool shaft to release the tool.
  • EP 579 577 B1 shows a tool with a shank which has two sections arranged axially one behind the other with different cross-sectional sizes.
  • a tool holder which also emerges from this publication likewise has two sections with different cross-sectional sizes in one
  • Both the sections of the tool shank and the sections of the receiving body are formed in the tool holder in such a way that bearing surfaces located on both sections of the tool holder find corresponding bearing surfaces of the two sections in the receiving body of the tool holder.
  • Tool shank e.g. known from the known SDS-plus insertion systems, rotary driving means and locking means, which come into operative connection with corresponding means for rotating driving and for axially locking the tool when the tool is inserted into the tool holder.
  • rotary driving and locking means are axial
  • the second section with the larger cross section of the shaft follows the locking and rotary driving means in the first section with the smaller cross section at a relatively large distance. This gives the first section a very long length, which also entails a large overall length of the tool shank.
  • the second section with the larger cross section is provided over its entire circumference with a plurality of axially extending grooves, into which corresponding webs engage in the second section of the tool holder. With this geometry of the second section, the highest possible torque transmission from the receiving body of the tool holder to the tool shank is to be achieved.
  • Torque transmission This causes the tool holder to wear in such a way that the receiving opening for the tool in the receiving body expands after a long period of use.
  • the mouth of the receiver is knocked out in a trumpet shape. The consequence of this is that the tool guidance becomes worse.
  • the invention is based on the inclusion of specifying a tool and an associated tool holder of the type mentioned at the outset, which are as compact as possible and are as wear-resistant as possible.
  • the stated object is achieved with the features of claim 1 with respect to the design of the tool in that the distance between the rotary driving and locking means present in the first section of the tool shaft and the cross-sectional jump from the first section to the second section having the larger cross section is shorter than the area of the shaft equipped with the rotary driving and locking means.
  • the stated object is achieved in that the distance between the rotary driving and locking means present in the first section of the tool holder and the cross-sectional jump from the first section to the second section in the tool holder with the larger cross section is shorter than that with the rotating driver and Locking means equipped area of the tool holder.
  • Guidance especially in the mouth area of the receiving body, is improved in that this section has a larger cross section.
  • This larger cross section brings with it a larger contact surface of the tool shank in the second region of the tool holder. This results in a very narrow tool guide, with the result that the wear in the region of the mouth of the receiving body is less severe and that the trumpet-shaped widening of the mouth of the receiving body does not occur so quickly.
  • This more precise tool guidance improves tool concentricity, which means that more precise drilling can be carried out.
  • the rotary driving and / or locking means can end in the first section before the cross-sectional jump to the larger cross-section of the second section or extend beyond the cross-sectional jump into the second section.
  • both sections have the same cross-sectional shapes, at least in the regions forming the contact surfaces.
  • Round cross sections are particularly advantageous. It has a particularly advantageous effect on the tool guide and thus on an exact tool concentricity with very little wear on the receiving body, in particular in its mouth region, if the majority of the second section with the larger cross section has a smooth surface - without incisions or elevations is.
  • the rotary entrainment means and / or the locking means on the tool shank can either be recesses recessed into the support surface of the first section or elevations protruding from the support surface.
  • the rotary driving and locking means are formed in the tool holder.
  • Figure 1 A longitudinal section through a tool holder with inserted therein
  • FIG. 2 a cross section D-D through the tool holder with the tool inserted therein
  • FIG. 3 a longitudinal section through the tool holder with the tool inserted therein, rotated by 90 ° with respect to the illustration in FIG. 1,
  • Figure 4 a side view of a tool shank with a view of a
  • FIG. 5 a longitudinal section through the tool shank
  • Figure 6 a side view of the tool shank with a view of a dome-shaped recess for locking the tool
  • Figure 7 is a perspective view of the tool shank.
  • FIGS. 1 and 3 The two longitudinal sections shown in FIGS. 1 and 3, rotated by 90 ° relative to one another, and the cross section DD shown in FIG. 2 through a tool holder with a tool inserted therein, illustrate the structure and function of the tool holder and the tool.
  • An essential component of the tool holder is a receiving body 1 with a central receiving opening 2, into which the shank 3 of a tool can be inserted.
  • the tool holder is coupled to a hand-held power tool, for example a hammer drill or an impact drill (not shown in the drawing), in such a way that the holder body 1 is driven in rotation by the drive spindle of the hand-held power tool.
  • a firing pin 4 protrudes into the receiving opening 2 of the receiving body 1 and exerts axial impacts on the shank 3 of the tool (e.g. drill or chisel) when the machine is struck.
  • the tool shank 3 must, on the one hand, in the receiving opening 2 of the receiving body
  • the means for axially locking the tool shank 3 have a locking ball 5, which is mounted in the wall of the receiving body 1 so as to be displaceable in the radial direction.
  • the locking ball 5 can partially in the
  • the locking ball 5 is radially covered by a locking ring 7 which radially surrounds the receiving body 1, and this locking ring 7 is encompassed by the locking body 1
  • Actuating sleeve 8 axially displaceable.
  • a spring 9 acts on the locking ring 7 with an axial force in the direction of the locking position, in which the locking ring 7 covers the locking ball 5.
  • a retaining plate 10 is arranged between the spring 9 and the locking ring 7, which axially retracts against the spring force when the shank 3 of the tool is inserted. The locking ring 7 only needs to unlock the
  • FIGS. 1 and 2 show the locking position of the locking ball 5.
  • the locking ball 5 dips through the opening 6 into the receiving opening 2 and into a dome-shaped recess 1 let into the tool shaft 3 1 a.
  • Another, diametrically opposite lying dome-shaped recess 12 makes it possible to insert the tool into the tool holder rotated by 180 ° about its longitudinal axis.
  • the dome-shaped recesses 11, 12 have a certain axial extent, so that an axial movement of the tool in the receiving body 1 is possible in the impact operation of the hand tool.
  • the actuating sleeve 8 is used to move the locking ring 7 against the holding plate 10 and against the spring 9 loading the holding plate 10, so that the locking ball 5 radially outwards from the dome-shaped recess
  • Dodge 11, 12 of the shaft 3 and the tool can be removed from the receiving body 1.
  • the means for rotational driving of the tool on the side of the shaft 3 consist of rotational driving grooves 13, 14 and embedded in it in the axial direction
  • a dust protection cap 17 is placed on the receiving body 1, which surrounds the tool shaft 3 in a form-fitting manner and also produces a form-fit connection with the actuating sleeve 8, so that the tool holder is sealed from the tool side against ingress of dust.
  • the rotary driving and locking means can have different geometries than shown in the previously described Figures 1, 2 and 3.
  • elevations radially projecting from the circumference of the shaft 3 can also be provided, which protrude into corresponding grooves in the receiving opening 2 of the receiving body 1. This would be a reversal between the rotary driving grooves 13, 14 and the rotary driving webs 15,
  • the locking mechanism can also be designed differently.
  • a locking body of some other type can be provided, and accordingly other geometries of the cutouts 11, 12 in the shaft 3 can also be used.
  • the shank 3 of the tool has two sections 18 and 19 arranged one behind the other with different cross-sectional sizes.
  • the first section 18 with the smaller cross section faces the firing pin 4 and the second section 19 with the larger cross section faces the entry opening of the tool holder for the tool.
  • Both sections 18 and 19 of the shank 3 of the tool find corresponding sections 20 and 21 in the receiving body 1 of the tool holder.
  • the first section 20 of the receiving body 1 on the machine side has a smaller cross section of the receiving opening 2 than the second section 21, which lies in the region of the entry opening for the tool.
  • the first sections 18 and 20 of the shank 3 and the receiving body 1 and the second sections 19 and 21 of the shank 3 and the receiving body 1 are matched to one another in terms of their size and shape in such a way that they form mutual contact surfaces and thus an exact guidance of the tool shank 3 in the receiving opening 2 of the
  • the tool shank 3 is given particularly good guidance in the tool holder.
  • the area load which is particularly strong in this area, is distributed over a larger contact area of the second section 19, 21. As a result, there is significantly less wear in the area of the inlet opening of the receiving body 1.
  • FIGS. 4 to 7 the tool shank 3 is shown detached from the tool holder in order to illustrate the geometry of the tool shank 3 again.
  • FIG. 4 shows a side view of the tool shaft 3 with a view of a rotary driving groove 13
  • FIG. 5 shows a longitudinal section A-A through this tool shaft 3
  • FIG. 6 shows a side view of this tool shaft 3 with
  • FIG. 7 shows a perspective illustration of the tool shank 3.
  • the two sections 18 and 19 are preferably cylindrical, that is to say they have a substantially round cross-sectional shape. It however, other cross-sectional shapes of the first and second sections 18, 19 are also permissible, just as it is permissible for the cross-sectional shapes of the two sections 18 and 19 to differ from one another.
  • the first section 18 is of such a length that the rotating driving and locking means extending in the longitudinal axis direction therein - in the form of rotating driving grooves 13, 14 and spherical recesses 11, 12 - Find space.
  • the first section 18 should in any case be kept so short that the distance between the rotary driving and locking means 11, 12, 13,
  • the rotary driving and locking means 11, 12, 13, 14 end before the cross-sectional jump to the larger cross section of the second section 19.
  • the rotating driving and / or locking means can also be used 11, 12, 13, 14 extend across the cross-sectional jump into the second section 19.
  • the rotary driving and / or the locking means 11, 12, 13, 14 should only extend so far into the second section 19 with the larger cross section that the majority of this second section has a smooth surface, that is to say without
  • This second section in the tool holder thus has good guiding properties because the second section 19 forms a very large contact surface in the tool holder, which leads to a reduction in the surface load, with the result that the tool holder experiences little wear in the area of the insertion opening for the tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Gripping On Spindles (AREA)
  • Drilling Tools (AREA)

Abstract

L'invention concerne un outil et un porte-outil comportant respectivement deux tronçons (18, 19, 20, 21) qui sont disposés axialement l'un derrière l'autre et présentent différentes dimensions de section transversale. Lesdits tronçons (18, 19, 20, 21) de la tige d'outil (3) et du porte-outil (1, 2) forment des surfaces d'appui mutuelles. Le premier tronçon (18) de ladite tige d'outil (3) et le premier tronçon (20) du porte-outil (1, 2) comprennent des moyens d'entraînement en rotation et de verrouillage (5, 11, 12, 13, 14, 15, 16) qui coopèrent les uns avec les autres. L'objectif de cette invention est de créer un outil et un porte-outil extrêmement compacts et inusables. A cet effet, les moyens d'entraînement en rotation et de verrouillage (5, 11, 12, 13, 14, 15, 16) sont montés en parallèle dans la direction axiale de la tige (3) ou du porte outil (1) et en série en direction périphérique. En outre, la distance séparant les moyens d'entraînement en rotation et de verrouillage (5, 11, 12, 13, 14, 15, 16) situés dans le premier tronçon (18, 20) de la tige (3) ou du porte-outil (1) et la transition du premier tronçon (18, 20) au deuxième tronçon (19, 21), qui présente une section transversale plus grande, est plus courte que la zone de la tige (3) ou du porte-outil (1, 2) comprenant lesdits moyens d'entraînement en rotation et de verrouillage (5, 11, 12, 13, 14, 15, 16).
EP03750292A 2002-09-05 2003-08-28 Outil et porte-outil con us pour une machine-outil portative Withdrawn EP1536925A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10241054 2002-09-05
DE10241054A DE10241054A1 (de) 2002-09-05 2002-09-05 Werkzeug und Werkzeughalter für eine Handwerkzeugmaschine
PCT/DE2003/002862 WO2004024397A2 (fr) 2002-09-05 2003-08-28 Outil et porte-outil conçus pour une machine-outil portative

Publications (1)

Publication Number Publication Date
EP1536925A2 true EP1536925A2 (fr) 2005-06-08

Family

ID=31724370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03750292A Withdrawn EP1536925A2 (fr) 2002-09-05 2003-08-28 Outil et porte-outil con us pour une machine-outil portative

Country Status (6)

Country Link
US (1) US20050232715A1 (fr)
EP (1) EP1536925A2 (fr)
JP (1) JP2005537943A (fr)
CN (1) CN1681624A (fr)
DE (1) DE10241054A1 (fr)
WO (1) WO2004024397A2 (fr)

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WO2009076508A1 (fr) * 2007-12-12 2009-06-18 Honey Well International Inc. Volet de tuyère et ensemble de bielle et procédé
US8770898B2 (en) * 2010-05-13 2014-07-08 Greenlee Textron Inc. Tail piece for an extendable drill bit assembly having a reduced head
CN102785136A (zh) * 2012-08-08 2012-11-21 无锡键禾数控机床有限公司 气门杆部数控无心磨床的导轮主轴结构
DE102013218675A1 (de) * 2013-09-18 2015-03-19 Robert Bosch Gmbh Handwerkzeugmaschine
US10314610B2 (en) 2015-03-25 2019-06-11 Medtronic Ps Medical, Inc. Slanted drive axis rotary surgical cutting tools and powered handpieces
USD800907S1 (en) 2015-03-25 2017-10-24 Medtronic Ps Medical, Inc. Surgical tool
US10080579B2 (en) 2015-03-25 2018-09-25 Medtronic Ps Medical, Inc. Pin drive rotary surgical cutting tools and powered handpieces
USD782042S1 (en) 2015-03-25 2017-03-21 Medtronic Ps Medical, Inc. Surgical tool
USD790699S1 (en) 2015-03-25 2017-06-27 Medtronic Ps Medical, Inc. Surgical tool
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USD800903S1 (en) 2016-02-09 2017-10-24 Medtronic Ps Medical, Inc. Surgical tool
CN108154808B (zh) * 2018-01-24 2024-05-28 深圳市光祥科技股份有限公司 一种led显示模组
US10849634B2 (en) * 2018-06-20 2020-12-01 Medtronic Xomed, Inc. Coupling portion for rotary surgical cutting systems
CN109318087A (zh) * 2018-11-18 2019-02-12 湖南新融创科技有限公司 一种手机配件加工装置
DE102020213165A1 (de) * 2020-10-19 2022-04-21 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine mit einer Verriegelungseinrichtung
US20220219306A1 (en) * 2021-01-14 2022-07-14 Milwaukee Electric Tool Corporation Tool bit
DE102021203064A1 (de) * 2021-03-26 2022-09-29 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine mit einer Verriegelungseinrichtung
DE102021203063A1 (de) * 2021-03-26 2022-09-29 Robert Bosch Gesellschaft mit beschränkter Haftung Handwerkzeugmaschine mit einer Verriegelungseinrichtung
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Also Published As

Publication number Publication date
US20050232715A1 (en) 2005-10-20
WO2004024397A2 (fr) 2004-03-25
DE10241054A1 (de) 2004-03-18
CN1681624A (zh) 2005-10-12
JP2005537943A (ja) 2005-12-15
WO2004024397A3 (fr) 2004-06-10

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