EP1535704B1 - Porte-outil pour un outil rotatif à percussion - Google Patents

Porte-outil pour un outil rotatif à percussion Download PDF

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Publication number
EP1535704B1
EP1535704B1 EP04105837A EP04105837A EP1535704B1 EP 1535704 B1 EP1535704 B1 EP 1535704B1 EP 04105837 A EP04105837 A EP 04105837A EP 04105837 A EP04105837 A EP 04105837A EP 1535704 B1 EP1535704 B1 EP 1535704B1
Authority
EP
European Patent Office
Prior art keywords
tool holder
rotary entrainment
rotary
holder according
grooves
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.)
Not-in-force
Application number
EP04105837A
Other languages
German (de)
English (en)
Other versions
EP1535704A1 (fr
Inventor
Werner Kleine
Werner Britten
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 EP1535704A1 publication Critical patent/EP1535704A1/fr
Application granted granted Critical
Publication of EP1535704B1 publication Critical patent/EP1535704B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25D2217/0034—Details of shank profiles
    • 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
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17042—Lost motion
    • 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
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17042—Lost motion
    • Y10T279/17068—Rotary socket

Definitions

  • the invention refers to a tool holder for an at least partially rotating and / or hammering tool, such as a drill bit, chisel or cutting bit for machining stone, concrete or masonry, according to the preamble of claim 1 and as from EP 1508 391 A2 known.
  • an at least partially rotating and / or hammering tool such as a drill bit, chisel or cutting bit for machining stone, concrete or masonry
  • a tool holder for a spigot end of a machine driven by a machine and driven by a hammer for example, accordingly DE3941646A1 an insertion sleeve extending along an axis and having inner cylinder jacket-shaped guide surfaces and radially inwardly projecting rotary driving webs and radially inwardly displaceable locking bodies, which engage in locking grooves of the associated insertion end of the tool and limit the axial mobility of the tool. Due to the necessary for the transmission of a given torque to the tool high surface pressure with respect to the guide surfaces radially inwardly disposed rotary support webs are subjected to high wear, which limits the life of the tool holder. Especially when tool holders for hand tools used in construction, which process brittle materials such as concrete and masonry and produce abrasive overburden, a low wear of the tool holders for the reliability of the power tool is important.
  • the object of the present invention consists in the realization of a short tool holder, which can transmit high torques wear.
  • a tool holder for a longitudinal axis along an axis at least partially rotating and / or beating tool at a coaxial Radialbezugsmass which corresponds to the inner radius, fully open receiving sleeve with a, at least partially with the Radialbezugsmass along the axis constantly extending, inner guide surface, at least three formed axially in the receiving sleeve, up to an axially free end face open, axially extending rotary driving grooves are axially extending at least at 0 °, 120 ° and 240 ° radially outside the Radialbezugsmasses, and at least one on the Radialbezugsmass radially displaceable Locking body, which is arranged circumferentially between two adjacent rotary driving grooves and diametrically opposite the third rotary driving groove, wherein a Radialbezugsmass certain central Drehnutwinkel the rotary driving grooves is at least 40 ° each.
  • each rotational drive groove has a radial rotational force depth depth which is proportional to the radial reference mass R by a constant minimum gap dimension, optimally 0.8 mm in the value range from R / 6 to R / 3, more preferably exactly R / 4.5, whereby an associated insertion end of a blade height h which is linearly correlated with the circumferentially oriented contact surface available for torque transmission as substantially wear-determining parameter, is set to a tribologically suitable value range with respect to the material pairing for tool holders and axially impact-stressed tools in an abrasive environment.
  • each Drehit Vietnamese screw above Drehmit via Spotify a single gear, a single gear, a single gear, or a single gear, a single gear, a single gear, a single gear, or a single gear, a single gear, a single gear, a single gear, a single gear, or a single gear, a single gear, a single gear, a single gear, a single gear, a single gear, a single gear, a single gear, and the under HERTZ'scher pressing wear-transmissible torque is practically sufficient dimensioned.
  • the central Drehnutwinkel the rotary driving grooves in each case a maximum of 70 °, whereby between two circumferentially adjacent rotary driving grooves a sufficiently large central sleeve segment angle for guiding the radially displaceable locking body remains, which is symmetrical uniform distribution of exactly three rotational drive grooves at least 50 °.
  • the central sleeve segment angle between two circumferentially adjacent rotary drive grooves between 50 ° and 80 °, whereby the Radialbezugsmass R a stop web to the radial stop of a circular cross-section in axial cross-section with a, between two rotary driving wings of the insertion end associated locking groove substantially filling circular section of a diameter in the value range from 1.2 R to 1.8 R, further advantageously a diameter of 1.4 R, remains in the radially inner locking position.
  • the locking body is formed roller-shaped and oriented parallel to the axis, whereby axially a higher shear strength is given.
  • a plurality of locking bodies are present, optimally exactly three, whereby higher axial forces can be transmitted to the locked tool from the tool holder, in particular when pulling out of a borehole.
  • the rotary driving grooves on the machine side a circumferentially closed, innenzylindermantelförmiger remplindelsend Scheme the guide inner surface of the Radial Operationssmasses R downstream, which are transferable to an associated, machine side end-side outer guide surface of the insertion high bending moments.
  • the leading end region has a guide length in the value range 1 R to 3 R, more preferably exactly 2 R, which can be done within this guide length a seal against the ingress of abrasive dust in the tool holder, further advantageous with a sealant such as a rubber lip seal.
  • FIG. 1 has a tool holder 1 for a longitudinal axis A rotating and beating tool 2 on a coaxial Radialbezugsmass R fully open receiving sleeve 3 with a guide inner surface 12 which extends with the Radialbezugsmass R constant along the axis A.
  • a machine-side leading end portion 13 of the guide inner surface 12 is axially upstream of a formed in the receiving sleeve 3, axially extending rotary driving groove 5, which is open to an axially free end face 4 out.
  • the rotational drive groove 5 has an axial rotational drive groove length L of 40 mm, within which a roller-shaped and parallel to the axis A oriented, radially displaceable locking body 6 is arranged, which is arranged diametrically to the rotary driving groove 5 and in the illustrated locking position both inside and outside of the radial reference mass R extends.
  • Downstream of the rotary driving groove 5 is the circumferentially closed, inner cylinder jacket-shaped machine-side leading end region 13 of the guide inner surface 12 with a guide length F of 2.0 R, which is assigned a sealant 10 in the form of a rubber lip seal for sealing against the ingress of abrasive dust into the tool holder 1.
  • FIG. 2 has the tool holder 1 exactly three inside rotary driving grooves 5, which are rotationally symmetric at 0 °, 120 ° and 240 ° radially outside the radial reference mass R extend, and on the Radialbezugsmass R radially displaceable locking body 6, the circumference between two adjacent rotary driving grooves 5 and diametrically is disposed opposite to the third rotary driving groove 5.
  • a Radialbezugsmass R specific central Drehnutwinkel ⁇ of the rotary driving grooves 5 is in each case 45 °.
  • the respective remaining central sleeve segment angle ⁇ for guiding the radially displaceable locking body 6 is 75 °.
  • Each rotational drive groove 5 has a radial rotational force depth H which is extended by a constant minimum gap dimension S of 0.8 mm and substantially proportional to 1 / 4.5 to the radial reference mass R.
  • the roller-shaped locking body 6 of diameter D of 1.4 R strikes in its radially inner locking position on a to the Radialbezugsmass R extending stop web 11, wherein its cross-sectionally locking circular section an associated locking groove 7 between two rotary drive wings 8 of the insertion end 9 of the tool 2 substantially fills.
  • Fig. 3 are in the tool holder 1 three spherical locking body 6 circumferentially symmetrically distributed, each disposed diametrically opposite a respective rotary driving groove 5.
  • the spherical locking body 6 fill in cross section with their locking circular sections depending on an associated locking groove 7 of the insertion end 9 substantially. Since the insertion end 9 with a Radialbezugsmass R corresponding external diameter does not penetrate further into the thus free rotary driving grooves 5, in this variant, the rotational drive takes place exclusively via the locking grooves 7 of the insertion end.

Claims (9)

  1. Raccord d'outil pour un outil (2) au moins partiellement tournant et/ou percutant suivant un axe (A), comprenant un manchon récepteur (3) qui est entièrement ouvert à une dimension de référence radiale coaxiale (R) et qui comprend une surface intérieure de guidage (12), laquelle s'étend de manière constante suivant l'axe (A) au moins partiellement avec la dimension de référence radiale (R) et est précédée axialement d'au moins trois gorges d'entraînement en rotation s'étendant axialement (5) qui sont ménagées sur le côté intérieur du manchon récepteur (3) et sont ouvertes jusqu'à un côté frontal libre axialement (4) et qui, s'étendent radialement à 0°, 120° et 240° à l'extérieur de la dimension de référence radiale (R), et comprenant au moins un corps de verrouillage (6) qui est apte à se déplacer radialement au-delà de la dimension de référence radiale (R) et qui est disposé, en périphérie, entre deux gorges d'entraînement en rotation voisines (5) et, diamétralement, en face de la troisième gorge d'entraînement en rotation (5), le manchon récepteur (3) étant entièrement ouvert par rapport à la dimension de référence radiale coaxiale (R), et en ce qu'un angle central de gorge de rotation (α) des gorges d'entraînement en rotation (5), défini suivant la dimension de référence radiale (R), est d'au moins 40°, caractérisé en ce que chaque gorge d'entraînement en rotation (5) présente une profondeur radiale de gorge d'entraînement en rotation (H) augmentée d'une dimension minimale constante d'interstice (S) et sensiblement proportionnelle à la dimension de référence radiale (R) dans une plage de valeurs de R/6 à R/3.
  2. Raccord d'outil selon la revendication 1, caractérisé en ce que chaque gorge d'entraînement en rotation (5) présente une longueur de gorge d'entraînement en rotation d'au moins 30 mm, optionnellement de 40 mm.
  3. Raccord d'outil selon une des revendications précédentes, caractérisé en ce que l'angle central de gorge de rotation (α) de chacune des gorges d'entraînement en rotation (5) est d'au plus 70°.
  4. Raccord d'outil selon une des revendications précédentes, caractérisé en ce qu'un angle central de segment de manchon (β) compris entre deux gorges d'entraînement en rotation voisines circonférentiellement (5) est compris entre 50° et 80°.
  5. Raccord d'outil selon une des revendications précédentes, caractérisé en ce que le corps de verrouillage (6) est de section axiale circulaire et, optionnellement, présente un diamètre (D) situé dans la plage de valeurs de 1,2 R à 1,8 R.
  6. Raccord d'outil selon la revendication 5, caractérisé en ce que le corps de verrouillage (6) est conformé en rouleau et est orienté parallèlement à l'axe (A).
  7. Raccord d'outil selon une des revendications précédentes, caractérisé en ce qu'il est prévu plusieurs corps de verrouillage (6), de manière optimale exactement trois.
  8. Raccord d'outil selon une des revendications précédentes, caractérisé en ce qu'une zone terminale de guidage (13) fermée en périphérie et en forme d'enveloppe intérieure de cylindre est disposée, côté machine, en aval des gorges d'entraînement en rotation (5).
  9. Raccord d'outil selon la revendication 5, caractérisé en ce que la zone terminale de guidage (13) présente une longueur de guidage (F) située dans la plage de valeurs de 1 R à 3 R, optionnellement égale à 2 R.
EP04105837A 2003-11-26 2004-11-17 Porte-outil pour un outil rotatif à percussion Not-in-force EP1535704B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10355376 2003-11-26
DE10355376 2003-11-26

Publications (2)

Publication Number Publication Date
EP1535704A1 EP1535704A1 (fr) 2005-06-01
EP1535704B1 true EP1535704B1 (fr) 2010-03-10

Family

ID=34442306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04105837A Not-in-force EP1535704B1 (fr) 2003-11-26 2004-11-17 Porte-outil pour un outil rotatif à percussion

Country Status (6)

Country Link
US (1) US7258350B2 (fr)
EP (1) EP1535704B1 (fr)
JP (1) JP4758637B2 (fr)
CN (1) CN100418706C (fr)
AT (1) ATE460255T1 (fr)
DE (1) DE502004010872D1 (fr)

Families Citing this family (7)

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DE102004054685A1 (de) * 2004-11-12 2006-05-18 Hilti Ag Werkzeugaufnahme
DE102006000168A1 (de) * 2006-04-10 2008-01-03 Hilti Ag Werkzeugaufnahme
DE102007048822A1 (de) * 2007-10-10 2009-04-16 Robert Bosch Gmbh Elektrische Kombi-Handwerkzeugmaschine
WO2014103031A1 (fr) 2012-12-28 2014-07-03 大昭和精機株式会社 Structure de support d'outil
CN104149074B (zh) * 2013-05-13 2016-12-28 宝时得机械（张家港）有限公司 夹头
CN109604657B (zh) * 2019-01-11 2020-06-09 亚普汽车部件股份有限公司 中空体夹具
US11945087B2 (en) * 2019-03-29 2024-04-02 Tien-I Industrial Co., Ltd. Impact tool head

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EP1508391A2 (fr) * 2003-08-22 2005-02-23 HILTI Aktiengesellschaft Tige pour un outil à percussion rotatif

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Also Published As

Publication number Publication date
US7258350B2 (en) 2007-08-21
JP2005153139A (ja) 2005-06-16
US20050110225A1 (en) 2005-05-26
EP1535704A1 (fr) 2005-06-01
CN100418706C (zh) 2008-09-17
JP4758637B2 (ja) 2011-08-31
ATE460255T1 (de) 2010-03-15
DE502004010872D1 (de) 2010-04-22
CN1644325A (zh) 2005-07-27

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