EP1319477B1 - Outil portatif électrique à percussion axiale - Google Patents

Outil portatif électrique à percussion axiale Download PDF

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Publication number
EP1319477B1
EP1319477B1 EP02406048A EP02406048A EP1319477B1 EP 1319477 B1 EP1319477 B1 EP 1319477B1 EP 02406048 A EP02406048 A EP 02406048A EP 02406048 A EP02406048 A EP 02406048A EP 1319477 B1 EP1319477 B1 EP 1319477B1
Authority
EP
European Patent Office
Prior art keywords
hand tool
electric hand
handgrip
tool according
force
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
EP02406048A
Other languages
German (de)
English (en)
Other versions
EP1319477A1 (fr
Inventor
Hans Böni
Orestis Voulkidis
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 EP1319477A1 publication Critical patent/EP1319477A1/fr
Application granted granted Critical
Publication of EP1319477B1 publication Critical patent/EP1319477B1/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
    • 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
    • B25D17/04—Handles; Handle mountings
    • B25D17/043—Handles resiliently mounted relative to the hammer housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/003—Crossed drill and motor spindles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/068—Crank-actuated impulse-driving mechanisms
    • 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
    • B25D2250/221—Sensors

Definitions

  • the invention refers to an at least partially axially impacting electric hand tool device such as a drill bit or chisel device for breaking down rock.
  • Performance parameters for the degradation performance are in particular the impact strength, impact frequency and optionally the speed of the impact tool.
  • Control functions of the electric hand tool device in the guide handle or auxiliary handle are arranged.
  • the control electronics of an electric hand tool device is controlled via a grinderless potentiometer with a pressure pad.
  • DE19510365 is arranged in such a grinderless potentiometer in the actuator between the pressure plate and the sensor, a compressible medium in the form of a fluid for pressure transmission.
  • US4250434 is a, for controlling a machine serving, electropneumatic sensor designed as an elastic pressure hose.
  • DE19703746 is arranged at the rear handle shell on the handle of an electric hand tool a damping element.
  • a fluid padded handle has a pressure sensor that serves to control the pump to produce the vibration damping fill pressure.
  • the object of the invention is a slideway-free implementation for the intuitive control of the performance parameters, in particular the axial impact energy of an at least partially axially striking electric hand tool. Another aspect is the reduction of the vibrations transmitted to the user's hand.
  • an at least partially axially impacting electric hand tool device has a handle and for at least one performance parameter on an electronic control means which is arranged by a two-dimensional force sensor disposed between two, arranged transversely to the impact axis, associated pressing surfaces and the user on the handle in the direction detected on the workpiece applied contact force sliding, is controllable.
  • planar force sensor is designed as an electropneumatic sensor which has a hollow pneumatic force transmission member between a pressure surface and the force sensor element, as a result of which it is very simple, sensitive and robust.
  • the force transmission member is filled with a readily deformable or fluid pressure transmission medium, for example.
  • a readily deformable or fluid pressure transmission medium for example.
  • the hollow pneumatic power transmission member is designed as a cushion or hose, the cross sections are compressed by the contact force and thereby deformed so that the hydrostatic pressure of the pressure transmission medium increases.
  • planar force sensor is arranged in front of the electric hand tool device under the axial bearing of the tool holder, for example, the spindle ball bearing, whereby the entire contact force is measured.
  • the force transmission member is extended to the handle, whereby the measurement of the total contact force on the force sensor element in the handle is possible.
  • the pressing surfaces are arranged with respect to the power flow between the percussion mechanism and the gripping surface of the handle, further advantageously on the tool-side axial fixing of the striking mechanism to the outer housing shell with the handle or on the modular fixing of the drive module to the handle module with the handle.
  • the power transmission member is formed flat across the impact axis and further advantageously disposed between the handle and a vibration-damped handle shell, whereby vibrations within the pressure transmission medium are damped and thus transmitted only reduced to the hand of the user.
  • the side handle is additionally formed with such a force transmission member for forming a planar force sensor, which is provided with a further force sensor element and electrically connected via signal lines to the force sensor element of the handle, whereby in sum the contact forces of both the handle and the side handle are used for control ,
  • the power transmission member of the side handle is pneumatically connected directly to the power transmission member of the handle via a connection hose, whereby a common force sensor element is sufficient and no leading into the front part of the power tool, live lines are necessary, thereby related safety problems are avoided.
  • planar force sensor is connected via a low-pass filter with a cutoff frequency less than 30 Hz to the control means, which filters out the low-frequency control signals and suppresses the higher-frequency vibrations.
  • FIG. 1 an axially striking electric hand tool device 1 with a drums 2 driving electric motor 3 a handle 4 and designed as a phase control electronic control means 5, which arranged with a perpendicular to the striking axis A, planar force sensor 6, which exerted by the user in the direction of the workpiece Contact force F detected on the handle 4 without sliding movement, is controllably connected.
  • the force sensor 6 is free of sliding movement between two associated pressing surfaces 7a, 7b, which are arranged between the percussion mechanism 2 and the gripping surface 8 of the handle 4. Schematically represented are the advantageous pressing surfaces 7a, 7b resp.
  • Force sensor 6 in each case at I on the tool-side axial fixing of the percussion mechanism 2 to the outer housing shell 9 with the handle 4, II in the modular definition of the drive module 10 to the handle module 11 with the handle 4 (force sensor 6"') and III between the Handle 4 and arranged by the flat force sensor 6 vibration damped handle shell 12.
  • a force sensor 6 'in the side handle 13 is pneumatically connected directly to the handle 4 via the connecting hose 14.
  • the annular force sensor 6 is arranged in front in the electric hand tool 1 in the axial bearing of a tool holder 20 in the spindle ball bearing 21 and extended with the connecting hose 14 to the handle 4, or connected to the sensor 6.
  • the force sensor 6 is in the output to Control means 5 downstream of a low-pass filter 19 ( Fig. 1 ).
  • planar force sensor 6 is designed as an electropneumatic sensor which has between a pressure surface 15 and the force sensor element 16, a hollow pneumatic power transmission member 17 which is filled with an easily deformable pressure transmission medium 18 and formed as a flat running hose.

Claims (11)

  1. Appareil électrique portatif pour l'usinage au moins partiellement par percussion axiale d'une pièce, comprenant un mécanisme de percussion (2), comprenant une poignée (4) et comprenant un moyen de commande électronique (5) pour au moins un paramètre de performance de l'appareil électrique portatif, caractérisé en ce qu'un capteur de force plat (6, 6") est disposé entre au moins deux surfaces de contact (7a, 7b) orientées transversalement à l'axe de percussion (A) et associées l'une à l'autre pour détecter sans glissement l'effort de mise en contact (F, F') exercé par l'utilisateur sur la pièce, et en ce que le moyen de commande (5) est relié de manière commandée au capteur de force (6, 6').
  2. Appareil électrique portatif selon la revendication 1, caractérisé en ce que le capteur de force plat (6, 6', 6", 6"') est conformé en capteur électropneumatique qui, entre une surface de pression (15) et l'élément capteur de force (16), comporte un organe creux de transmission de force (17).
  3. Appareil électrique portatif selon la revendication 2, caractérisé en ce que l'organe de transmission de force (17) est empli d'un agent de transmission de force légèrement déformable ou fluide (18).
  4. Appareil électrique portatif selon la revendication 2 ou 3, caractérisé en ce que l'organe de transmission de force (17) est conformé en coussin ou en boyau.
  5. Appareil électrique portatif selon une des revendications 2 à 4, caractérisé en ce qu'il est également prévu une poignée latérale (13) avec un organe supplémentaire de transmission de force (6"') pour former un capteur de force plat supplémentaire.
  6. Appareil électrique portatif selon une des revendications précédentes, caractérisé en ce que, dans l'appareil électrique portatif, le capteur de force plat (6") est disposé à l'avant sous le moyen de montage axial d'un raccord d'outil.
  7. Appareil électrique portatif selon une des revendications 2 à 5, caractérisé en ce que l'organe de transmission de force (17) est prolongé jusqu'à la poignée (4).
  8. Appareil électrique portatif selon une des revendications précédentes, caractérisé en ce que, par rapport à la chaîne cinématique, les surfaces de contact (7a, 7b) sont disposées entre le mécanisme de percussion (2) et la surface de préhension de la poignée (4), selon une autre option sur le moyen de fixation axiale, côté outil, du mécanisme de percussion (2) à une coque extérieure de carter (9) englobant la poignée (4) ou sur le moyen de fixation modulaire du module d'entraînement (10) à un module de poignée (11) englobant la poignée (4).
  9. Appareil électrique portatif selon une des revendications précédentes, caractérisé en ce que les surfaces de contact (7a, 7b) sont disposées entre une poignée (4) et une coque de poignée à amortissement vibratoire (12).
  10. Appareil électrique portatif selon la revendication 5, caractérisé en ce que les surfaces de contact (7a, 7b) sont disposées entre une poignée (4) et une coque de poignée à amortissement vibratoire (12), et l'organe de transmission de force (17) d'une poignée latérale (13) est relié directement de manière pneumatique à l'organe de transmission de force (17) de la poignée (4) par l'intermédiaire d'un flexible de liaison (14).
  11. Appareil électrique portatif selon une des revendications précédentes, caractérisé en ce que le capteur de force plat (6, 6') est relié au moyen de commande (5) par l'intermédiaire d'un filtre passe-bas (19) possédant une fréquence limite inférieure à 30 Hz.
EP02406048A 2001-12-12 2002-12-03 Outil portatif électrique à percussion axiale Expired - Lifetime EP1319477B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10160864 2001-12-12
DE10160864A DE10160864A1 (de) 2001-12-12 2001-12-12 Axial schlagendes Elektrohandwerkzeuggerät

Publications (2)

Publication Number Publication Date
EP1319477A1 EP1319477A1 (fr) 2003-06-18
EP1319477B1 true EP1319477B1 (fr) 2010-04-14

Family

ID=7708829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02406048A Expired - Lifetime EP1319477B1 (fr) 2001-12-12 2002-12-03 Outil portatif électrique à percussion axiale

Country Status (5)

Country Link
US (1) US6799643B2 (fr)
EP (1) EP1319477B1 (fr)
JP (1) JP2003191178A (fr)
CN (1) CN1298471C (fr)
DE (2) DE10160864A1 (fr)

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Also Published As

Publication number Publication date
DE10160864A1 (de) 2003-06-26
CN1424166A (zh) 2003-06-18
US20030116333A1 (en) 2003-06-26
EP1319477A1 (fr) 2003-06-18
CN1298471C (zh) 2007-02-07
JP2003191178A (ja) 2003-07-08
DE50214358D1 (de) 2010-05-27
US6799643B2 (en) 2004-10-05

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