Metal working – Method of mechanical manufacture – Assembling or joining
Reexamination Certificate
2007-11-13
2007-11-13
Cadugan, Erica (Department: 3722)
Metal working
Method of mechanical manufacture
Assembling or joining
C029S469000, C409S201000, C409S216000
Reexamination Certificate
active
11724271
ABSTRACT:
This invention discloses a direct drive spindle assembly including a main fork formed by a base and a parallel pair of spaced fork arms and rotated about a first rotational axis. Moreover, the direct drive spindle assembly includes a first drive established by a hollow housing, a first motor stator and a first motor rotor, wherein the first motor rotor coupled with the base of the main fork drives the main fork to rotate about the first rotational axis. Furthermore, the direct drive spindle assembly includes a second drive contained in a room between the fork arms of the main fork and established by a second motor stator concentric with a second rotational axis, a second motor rotor and a rotor transmission ring, wherein the second rotational axis is perpendicular to the first rotational axis and the second motor stator is coupled with the fork arms of the main fork. In addition, the direct drive spindle assembly includes a spindle box having an orthogonal cross structure. A first arm of the rotor transmission ring is coupled with the second motor rotor and a second arm of the structure is connected to a spindle head. The feature of the present invention is that after the second drive is fit in the room between the above-mentioned paired fork arms of the main fork and then combined with the base of the main fork and firmly locked in the right position, the whole structure can achieve preferred precision.
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Lin Chun-Chieh
Tsao Hsiang-Yuan
Cadugan Erica
Roundtop Machinery Industries Co., Ltd
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