Impact drill

An impact drill minimizing transmission of vibration to a handle (406) gripped by a user's hand. A spindle (2) extends through a main frame (1) and is movable in its axial direction and rotatablea about its axis. A first ratchet (4) is rotatable and axially movable together with the spindle (2)...

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Hauptverfasser:	SHIGERU ISHIKAWA, TAKUMA SAITO, SHINKI OHTSU, HIDEKI WATANABE, KENJI KATAOKA, JYUNICHI TOUKAIRIN, KAZUHIDE OHZEKI
Format:	Patent
Sprache:	eng
Schlagworte:	BORING 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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creator	SHIGERU ISHIKAWA TAKUMA SAITO SHINKI OHTSU HIDEKI WATANABE KENJI KATAOKA JYUNICHI TOUKAIRIN KAZUHIDE OHZEKI
description	An impact drill minimizing transmission of vibration to a handle (406) gripped by a user's hand. A spindle (2) extends through a main frame (1) and is movable in its axial direction and rotatablea 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 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 (2) is reciprocally moved in the axial direction. A spring (20) is interposed between the main frame (1) and the second ratchet (5) to urge the second ratchet (5) toward the first ratchet (4). In the drilling mode, the second ratchet (5) is always out of contact from the main frame and is floatingly maintained within the main frame (1) even if a force ranging from 15 to 25 kg is applied to the main frame (1) toward a workpiece (19).
format	Patent
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A spindle (2) extends through a main frame (1) and is movable in its axial direction and rotatablea 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 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 (2) is reciprocally moved in the axial direction. A spring (20) is interposed between the main frame (1) and the second ratchet (5) to urge the second ratchet (5) toward the first ratchet (4). 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A spindle (2) extends through a main frame (1) and is movable in its axial direction and rotatablea 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 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 (2) is reciprocally moved in the axial direction. A spring (20) is interposed between the main frame (1) and the second ratchet (5) to urge the second ratchet (5) toward the first ratchet (4). In the drilling mode, the second ratchet (5) is always out of contact from the main frame and is floatingly maintained within the main frame (1) even if a force ranging from 15 to 25 kg is applied to the main frame (1) toward a workpiece (19).</abstract><oa>free_for_read</oa></addata></record>
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subjects	BORING HAND TOOLS MACHINE TOOLS MANIPULATORS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERCUSSIVE TOOLS PERFORMING OPERATIONS PORTABLE POWER-DRIVEN TOOLS TRANSPORTING TURNING
title	Impact drill
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