EP2132005B1 - Mécanisme rotopercutant - Google Patents

Mécanisme rotopercutant Download PDF

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Publication number
EP2132005B1
EP2132005B1 EP08708789A EP08708789A EP2132005B1 EP 2132005 B1 EP2132005 B1 EP 2132005B1 EP 08708789 A EP08708789 A EP 08708789A EP 08708789 A EP08708789 A EP 08708789A EP 2132005 B1 EP2132005 B1 EP 2132005B1
Authority
EP
European Patent Office
Prior art keywords
anvil
tool shaft
rotary
hammer
percussion
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
EP08708789A
Other languages
German (de)
English (en)
Other versions
EP2132005A1 (fr
Inventor
Aldo Di Nicolantonio
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 EP2132005A1 publication Critical patent/EP2132005A1/fr
Application granted granted Critical
Publication of EP2132005B1 publication Critical patent/EP2132005B1/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
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
    • B25B21/026—Impact clutches
    • 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
    • B25D11/10—Means for driving the impulse member comprising a cam mechanism
    • B25D11/102—Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool
    • B25D11/106—Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool cam member and cam follower having the same shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of 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
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0023—Tools having a percussion-and-rotation mode

Definitions

  • the invention relates to a percussion drill according to the preamble of claim 1.
  • Such percussion drill is from the US 2006/0024141 A1 known.
  • the known percussion drill has a braking means to activate during drilling operation activation of the rotary impact mechanism already at low without already without contact force of the machine to a workpiece.
  • an impact wrench with a rotary impact mechanism which has a rotary impact mechanism with hammer and anvil surfaces, which are arranged obliquely relative to a plane extending orthogonally to the axis of rotation. Exact angle information regarding the arrangement of the hammer and anvil surfaces of the font, however, are not apparent.
  • the rotary impact of an impact wrench usually has a much lower speed than that of a drill or impact drill.
  • Rotary impact devices enable the release of high torques at relatively low power input in almost photosmomentsbuild way. Furthermore, they are characterized by the fact that they convert the continuous power output of the drive motor in a punch-shaped angular momentum, the energy output of the engine is stored in a rotational impact weight and abruptly transmitted by means of a pulse of high power intensity on a non-rotatably mounted on a tool shaft carrying a screwing anvil , Another advantage of rotary impact is that they are compact and inexpensive to produce.
  • Rastenschlagwerke In impact drills mostly Rastenschlagwerke be used, which unlike the rotary impact produce no angular momentum in the circumferential direction of the tool shaft, but only an adjusting pulse in the axial direction. Rastenschlagwerke have the advantage that they are extremely simple and inexpensive to produce. In practice, however, these prove to be less effective (low impact). More powerful mechanical percussion for impact drills, for example, so-called mass impact, the structure of which is very complex and therefore expensive to produce and assemble.
  • the invention has the object of providing a percussion drill according to the preamble of claim 1 such that this allows a simple as possible structural design a punch-shaped angular momentum and an impulse in the longitudinal axis of the tool, the pulses in the usually used tools and materials to be processed enable the most effective and tool-friendly machining should.
  • This object is achieved in a hammer drill with the features of claim 1.
  • the rotary impact mechanism can be formed with all known adjustment mechanisms, such as a cam mechanism, a Schrägnuten mechanism, in particular a V-groove mechanism.
  • the tool shaft is axially adjustable in such a way, in particular between two axial stops, that a rotational displacement results in an axial displacement of the tool by at least two, preferably at least three, in particular at least five millimeters, or more.
  • the hammer surface and the corresponding anvil surface in the same direction and with the same Curvature radius are curved, so are formed at least approximately congruent shape.
  • the anvil has a plurality of anvil surfaces inclined in the same direction and / or the rotational impact weight has a plurality of hammer surfaces inclined in the same direction.
  • the anvil at least two in has opposing directions inclined anvil surfaces and / or the rotational impact weight at least two mutually opposite directions inclined hammer surfaces.
  • both mutually oppositely inclined anvil surfaces and both mutually oppositely inclined hammer surfaces are each at an axial projection of the anvil and the rotational impact weight.
  • rotary impact mechanism in which the adjusting mechanism can be blocked or bridged, preferably such that at an increased torque request by the tool shaft no impact pulse is triggered.
  • An advantage is a construction in which the tool shaft, in particular together with the anvil by means of a, in particular designed as a helical spring, in Direction to an axial stop spring force is applied, wherein the axial stop is preferably disposed at the opposite end of the free end of the tool shaft.
  • the spring serves as a return spring for adjusting the tool shaft in its initial position after completed axial movement.
  • the rotary impact mechanism can also be designed as Schrägnuten-, in particular V-Nutenschlagwerk, or as a pulse impact mechanism. Further control or adjustment mechanisms are also conceivable.
  • the formation of the rotary impact mechanism as a V-groove impact mechanism would have the advantage that the energy stored in the rotational impact weight can accelerate quasi-free from the drive motor by a spring in the wire direction. In a cam follower described by way of example below, part of the stored energy is used to accelerate the drive motor.
  • rotary impactor 1 comprises a tool shaft 2, at the upper level in the plane of the drawing, for example, a drill chuck is arranged with a drill tool.
  • a rotary impact weight 3 is arranged which is provided with an outer longitudinal toothing 4.
  • the motor shaft is formed with a longitudinal toothing 4 conforming to the longitudinal toothing, which is engaged with the longitudinal teeth 4 of the rotary impact weight 3 (not shown), the rotational impact weight 3 in the direction of arrow 5 (left-handed) driven.
  • the rotational impact weight 3 is supported on the cam 6, wherein the rotational impact weight 3 by means of a return spring 9, which at one end to a rotationally fixed on the tool shaft 2 arranged anvil 10th (Anvil disk) and at the other end at one Ring shoulder 11 of the rotary impact weight 3 is supported in the axial direction on the cam 6 spring force.
  • the driven, further rotating rotational impact weight 3 is pressed by rolling the ball 8 via the cam 7 against the spring force of the return spring 9 on the camshaft 18 forward in the direction of arrow 19.
  • an oblique hammer surface 15 of the rotary impact weight 3 strikes an anvil surface 16 of the anvil 10.
  • the hammer surface 15 is approximately 45 ° relative to a plane E orthogonal to the axis of rotation 13 and through the anvil 10 ° inclined.
  • the positive connection between the camshaft 18 and the tool shaft 2 is preferably formed such that the positive engagement in the axial movement of the tool shaft 2 and the axially differently mounted camshaft 18 does not solve.
  • Fig. 2 It is shown how the inclined at an angle ⁇ of about 45 ° to the plane E hammer surface 15 and the plane E at an angle ⁇ of about 135 ° inclined anvil surface 16 together.
  • Fig. 3 only a section of the tool shaft 2 with anvil 10 and a section of the rotary impact weight 3 is shown.
  • the rotational impact weight 3 has two mutually oppositely inclined hammer surfaces 15, both of which enclose with the plane E an angle ⁇ of about 65 °.
  • the anvil 10 is provided with two mutually oppositely inclined hammer surfaces 16 which each define an angle ⁇ of about 115 ° with the plane E.
  • the angular relationship ⁇ 180 ° - ⁇ applies here.
  • the rotary impact mechanism 1 shown can both left and also an anti-clockwise axial impact pulse to the tool shaft 2 generating operated.

Landscapes

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

Claims (5)

  1. Perceuse à percussion comprenant un arbre d'outil (2), à l'extrémité libre duquel est disposé un mandrin de perçage, et comprenant un mécanisme de roto-percussion avec un poids de roto-percussion (3) pouvant être entraîné, avec au moins une surface de marteau (15), et comprenant une enclume (10) connectée fonctionnellement avec le poids de roto-percussion (3) de manière à pouvoir tourner autour d'un axe de rotation commun (13) et connectée fonctionnellement en transmettant le couple avec l'arbre d'outil (2), laquelle enclume présente au moins une surface d'enclume (16), sur laquelle la surface de marteau (15) est disposée de manière à agir par percussion dans la direction périphérique, l'arbre d'outil (2) étant monté de manière déplaçable axialement, et la surface d'enclume (16) et/ou la surface de marteau (15) étant orientées et/ou réalisées de telle sorte que par une percussion de la surface de marteau (15) sur la surface d'enclume (16), il en résulte, en plus d'une impulsion de rotation sur l'arbre d'outil (2) dans la direction périphérique, un déplacement de l'arbre d'outil (2) dans la direction axiale (17), caractérisée en ce que la surface de marteau (15) est inclinée par rapport à un plan (E) s'étendant perpendiculairement à l'axe de rotation (13), suivant un angle (α) compris entre 35° et 55°, de préférence d'environ 45°.
  2. Perceuse à percussion selon la revendication 1, caractérisée en ce que le mécanisme de roto-percussion (1) est muni d'un mécanisme de déplacement présentant un ressort de rappel (9), lequel est réalisé, en cas de demande de couple accrue de l'arbre d'outil (2) sous la contrainte du ressort de rappel (9) entre le poids de roto-percussion (3) et l'enclume (10), pour provoquer un mouvement relatif combiné dans la direction axiale et la direction périphérique et pour provoquer par conséquent l'effet de percussion de la surface de marteau (15) dans la direction périphérique sur la surface d'enclume (16).
  3. Perceuse à percussion selon l'une quelconque des revendications précédentes, caractérisée en ce que l'enclume (10) présente plusieurs surfaces d'enclume (16) inclinées dans la même direction et/ou le poids de roto-percussion (3) présente plusieurs surfaces de marteau (15) inclinées dans la même direction.
  4. Perceuse à percussion selon l'une quelconque des revendications précédentes, caractérisée en ce que l'enclume (10) présente au moins deux surfaces d'enclume (16) inclinées dans des directions opposées et/ou le poids de roto-percussion (3) présente au moins deux surfaces de marteau (15) inclinées dans des directions opposées.
  5. Perceuse à percussion selon l'une quelconque des revendications précédentes, caractérisée en ce que l'arbre d'outil (2) est sollicité par la force d'un ressort au moyen d'un ressort dans la direction d'un arbre à came (18).
EP08708789A 2007-03-28 2008-02-07 Mécanisme rotopercutant Not-in-force EP2132005B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007014757A DE102007014757A1 (de) 2007-03-28 2007-03-28 Drehschlagwerk
PCT/EP2008/051509 WO2008116691A1 (fr) 2007-03-28 2008-02-07 Mécanisme rotopercutant

Publications (2)

Publication Number Publication Date
EP2132005A1 EP2132005A1 (fr) 2009-12-16
EP2132005B1 true EP2132005B1 (fr) 2012-05-02

Family

ID=39326716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08708789A Not-in-force EP2132005B1 (fr) 2007-03-28 2008-02-07 Mécanisme rotopercutant

Country Status (5)

Country Link
EP (1) EP2132005B1 (fr)
AT (1) ATE555880T1 (fr)
DE (1) DE102007014757A1 (fr)
ES (1) ES2382497T3 (fr)
WO (1) WO2008116691A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103213103B (zh) * 2012-01-19 2015-07-15 南京德朔实业有限公司 紧固件工具
US9272400B2 (en) * 2012-12-12 2016-03-01 Ingersoll-Rand Company Torque-limited impact tool
EP2759378B1 (fr) * 2013-01-28 2015-11-04 Chervon (HK) Limited Outil polyvalent pour des éléments de fixation
JP2015024474A (ja) * 2013-07-26 2015-02-05 日立工機株式会社 インパクト工具
DE102016203389A1 (de) * 2016-03-02 2017-09-07 Robert Bosch Gmbh Mechanisches Drehschlagwerk für eine Handwerkzeugmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2049273A (en) 1932-10-06 1936-07-28 Robert H Pott Impact tool
FR1057422A (fr) * 1952-05-27 1954-03-08 Clé de serrage
US2940565A (en) * 1956-05-14 1960-06-14 Schodeberg Carl Theodore Power driven impact tool
DE1478809A1 (de) 1962-09-15 1969-02-20 Bosch Gmbh Robert Motorisch angetriebener Drehschlagschrauber
US20060024141A1 (en) 2004-07-30 2006-02-02 Hilti Aktiengesellschaft Power tool with an intermittent angular torque pulse

Also Published As

Publication number Publication date
EP2132005A1 (fr) 2009-12-16
ATE555880T1 (de) 2012-05-15
ES2382497T3 (es) 2012-06-08
WO2008116691A1 (fr) 2008-10-02
DE102007014757A1 (de) 2008-10-02

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