Chuck with position detecting function
AssigneeSMC Corporation
InventorsSeiji Takanashi, Satoru Ito, Koichiro Kanda
Life of this patent
Estimating the term…
Abstract
A plurality of jaw members 3, 3 for gripping a work piece on a casing 2, to be opened or closed freely, a driving part 4 having a driving rod 9 to be moved linearly, reciprocally, a converting mechanism 7 for converting the linear reciprocal motion of the driving rod 9 into the opening or closing operation of the jaw members 3, 3, a position detecting part 5 capable of detecting the operating position of the jaw members 3, 3 for all the stroke, comprising a scale 33 displaced synchronous with the driving rod 9, and a reader 34 for reading the calibration engraved on the scale 33, and a linear guide mechanism 6 for guiding the linear reciprocal movement of the scale 33.
Claims6
A chuck with a position detecting function, comprising:
- a plurality of jaw members for gripping a work piece, the plurality of jaw members provided on an axial end part of a casing and configured to open and close orthogonally to the axis of the casing;
- a driving part having a driving rod linearly and reciprocally movable in parallel to the axis of the casing, the driving part provided on a base end part of the casing on one of right and left sides of the casing;
- a position detecting part configured to detect operating positions of the jaw members, the position detecting part having a scale and a reader, the scale configured to move linearly and reciprocally in parallel to and synchronous with the driving rod and provided adjacent to the driving part on the base end part of the casing, the reader being fixed on a certain position of the casing for reading calibration on the scale;
- a linear guide mechanism provided between the driving part and the position detecting part and configured to guide linear reciprocal movement of the scale;
- and
- a converting mechanism provided between the jaw members and the driving part and configured to convert linear reciprocal motion of the driving rod into opening and closing operations of the jaw members;
- wherein:
- the converting mechanism comprises two levers for opening and closing the jaw members by swaying, and a relay plate for interlocking the levers with the driving rod;
- and
- the relay plate is provided with a relay shaft positioned on a center portion of the chuck and having a common shaft positioned to pivot the levers, the relay plate is interlocked with the driving rod and a scale supporting member supporting the scale so as to be capable of being displaced together with the relay shaft.
Dependencies are inferred from the claim text.