该装置适用于直径尺寸变化较大的零件定心夹紧。在图1中,液压缸8通过顶杆10推动卡爪4,卡爪4与齿轮7一起转动,并带动齿轮6与卡爪1一起转动。夹紧零件时,卡爪1上二个接触点和卡爪4上一个接触点同零件接触,卡爪1上二个接触面1a,1b的形成由下述方法获得。在图2、图3中齿轮6、齿轮7的半径分别为 This device is suitable for the centering and clamping of parts with larger diameter changes. In FIG. 1, the hydraulic cylinder 8 pushes the claw 4 through the jack 10, the claw 4 rotates together with the gear 7, and drives the gear 6 to rotate together with the claw 1. When the part is clamped, the two contact points on the pawl 1 and the one contact point on the pawl 4 come into contact with the part, and the formation of the two contact surfaces 1a, 1b on the pawl 1 is obtained by the following method. In Figure 2, Figure 3, the gear 6, the radius of the gear 7 are