Impact drill

Impact drill

An impact drill minimizing transmission of vibration to a handle gripped by a user's hand. A spindle (2) extends through a main frame (1) and is movable in its axial direction and rotatable about its axis. A first ratchet (4) is rotatable and axially movable together with the spindle (2). A sec...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: OHZEKI, KAZUHIDE, WATANABE, HIDEKI, SAITO, TAKUMA, TOUKAIRIN, JYUNICHI, KATAOKA, KENJI, OHTSU, SHINKI, ISHIKAWA, SHIGERU
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BORING
COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDEDFOR
DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOTPARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOTOTHERWISE PROVIDED FOR
HAND TOOLS
MACHINE TOOLS
MANIPULATORS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERCUSSIVE TOOLS
PERFORMING OPERATIONS
PORTABLE POWER-DRIVEN TOOLS
TRANSPORTING
TURNING
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Beschreibung
Zusammenfassung:An impact drill minimizing transmission of vibration to a handle gripped by a user's hand. A spindle (2) extends through a main frame (1) and is movable in its axial direction and rotatable about its axis. A first ratchet (4) is rotatable and axially movable together with the spindle (2). A second ratchet (5) is axially movable but unrotatable. The first ratchet (4) has a first serrated surface and the second ratchet (5) has a second serrated surface in confrontation with the first serrated surface. In an impact drilling mode, the first serrated surfaces is brought into abutment with the second serrated surface so that the spindle is reciprocally moved in the axial direction. A first spring (120) is interposed between the main frame (1) and the second ratchet (5) to urge the second ratchet (5) toward the first ratchet (4). A second spring (121) is interposed between the main frame and the second ratchet (5) to urge the second ratchet (5) away from the first ratchet (4). In the impact drilling mode, the second ratchet (5) is always out of contact from the main frame (1) and is floatingly maintained within the main frame (1).