Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Locking means
Patent
1991-06-14
1993-02-23
Luong, Vinh T.
Machine element or mechanism
Rotary member or shaft indexing, e.g., tool or work turret
Locking means
74813C, 74813L, 74409, B23B 2324
Patent
active
051880040
ABSTRACT:
A turntable apparatus has a turntable in combination with an indexing mechanism for use in a universal machine tool. The turntable has a spindle, and a turntable driving system is provided for driving the turntable. A driving system is used for driving an indexing mechanism for separately driving the turntable, and has an indexing shaft. A first arrangement is provided for clamping the main spindle of the turntable, and a second arrangement is provided for clamping the indexing shaft of the indexing mechanism driving system. A backlash-eliminating arrangment is provided for eliminating backlash in each of the turntable driving system and the driving system for the indexing mechanism, so that the turntable can be rotated by the driving system to conduct indexing of the turntable in a condition where an output torque developed by the turntable driving system is limited to a relatively low level, and wherein, after positioning of the turntable, the main spindle of the turntable and an indexing shaft of the indexing mechanism driving system are clamped at the same time in a condition such that the backlash in each of the driving systems has been eliminated by the backlash-eliminating arrangement.
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Engine Fluide Etelubrification, vol. 10, No. 40, Jun. 1971, pp. 69-73, Paris, FR: "Cours de lubrification" p. 72, right-hand column, lines 40-44*.
Kabushiki Kaisha Komatsu Seisakusho
Luong Vinh T.
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