| 摘要 |
A head for the linear dimension checking of mechanical pieces, including a casing (1), that defines a longitudinal geometric axis, an arm-set (5), movable with respect to the casing, a feeler (15), coupled to the movable arm-set, for touching the piece to be checked, a bias device (19), arranged between the casing and the movable arm-set for urging the movable arm-set into contact with the casing, a detecting device (23), coupled to the casing, including a movable element (27), and a transmission device (35,38) between the movable arm-set and the movable element of the detecting device. In order to reduce the frictions and improve the repeatability of the head, the transmission device includes a wire (38), substantially rigid in a longitudinal direction but flexible in the directions perpendicular to the longitudinal direction. The wire has a first end coupled to the movable arm-set and a second end for cooperating with the movable element of the detecting device.
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