图示为ΓOCT8522-79推荐的一种钻夹头(作者发明证书1450926),其主要特点是重量轻和外形尺寸小。它是由带锥齿轮的板手1和曲臂3组成。曲臂上有凸起的搭子4,以便放开曲臂之用。轴套8装在板手杆轴上,螺母6和锁紧螺母7则旋在轴套上,而在8内备有连接板手和曲臂3的钩环2。此钻夹头的工作方式如下。先将板手一头的柱柄与放入夹头套中的一个径向孔内,同时使锥齿轮与夹头螺母上的齿圈相啮合,再将曲臂3引到夹头套下面,转动板手即可夹紧钻头。然后使曲臂同夹头套脱钩并取出板手。当用于其他类型的钻头需要调整夹头时,可将螺母6移动一个必要 Pictured as ΓOCT8522-79 recommended a drill chuck (Author Certificate 1450926), the main features are light weight and small size. It consists of bevel gear wrench 1 and crank arm 3. Raised on the crank arm take 4, in order to release the song of the use. Bushing 8 is mounted on the handle bar shaft, nut 6 and the lock nut 7 is screwed on the sleeve, and 8 is equipped with a hook and loop connecting arm and crank 3 2. The drill chuck works as follows. First put a wrench on the handle of the wrench and put it into a radial hole in the chuck sleeve, at the same time, make the bevel gear mesh with the ring gear on the chuck nut, and then lead the crank arm 3 under the chuck sleeve to rotate the wrench Can be clamped drill. Then remove the hook from the chuck housing and remove the wrench. When adjusting the collet for use with other types of drill bits, the nut 6 may be moved as necessary