| 摘要 |
Self-centering steady of the closed type comprising a housing (H), an actuator (14), a center gripping arm (11) and a pair of side gripping arms (12,13) intended to grip a workpiece (P) under the action of the actuator (14) which is provided with cam surfaces (31,32) intended to engage the side gripping arms (12,13) in order to cause the workpiece engagement and/or disengagement movements. Each side gripping arm (12,13) is connected to the actuator (14) and is slidably received in a rotating element (26) provided in the steady housing (H). The center gripping arm (11) is slidably received in a slide guide (G) provided in the steady housing (H). The rotating elements (26) together with said side gripping arms (12,13) and with said center gripping arm (11) forming in the housing a closed structure preventing dust and scraps from entering the steady housing (H), both with the gripping arms (11,12,13) in the retracted and in the extended condition. <IMAGE> |
