Index device for machine tool
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United States of America Patent
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Nov 12, 2013
Grant Date -
Jul 15, 2010
app pub date -
Jul 1, 2008
filing date -
Jul 3, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
An index device for a machine tool includes a rotary shaft (40) to which a drive object is attached, a housing (30) surrounding the rotary shaft (40), a bearing (BI, B2) secured between the housing (30) and the rotary shaft (40) by a securing member (30b), and a drive (M) provided around the rotary shaft (40) and including a rotor (M1a, M2a) and a stator (M1b, M2b). The stator (M1b, M2b) is attached to the housing (30) and the rotor (M1a, M2a) is attached to the rotary shaft (40). The rotary shaft (40), the bearing (BI, B2), the rotor (M1a, M2a), and the securing member (30b) are connected together to form a built-in unit (22) that can be inserted into and extracted from an enclosure unit including a casing member (30a, 31a) of the housing (30) and the stator (M1b, M2b), thus facilitating connection and disconnection of wiring between the stator of a DD motor mounted in a spindle head of a machine tool and a main body of the machine tool.
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