| 摘要 |
Disclosed is a combined-type driving sleeve of a drilling rig with a reliably fixed draw key, comprising a driving sleeve main body (1), a draw key (2), a fixed stopper block (6), a moving stopper block (7) and a bolt (8); the fixed stopper block (6) being fixed on one end of a groove on the driving sleeve main body (1), and the moving stopper block (7) being fixed on the other end of the groove on the driving sleeve main body (1) via the bolt, and the draw key (2) being fixed in the groove on the driving sleeve main body (1) by means of the fixed stopper block (6) and the moving stopper block (7). The advantages thereof are: the draw key of the driving sleeve is reliably fixed and will not easily come loose; the method of mounting the draw key of the driving sleeve is simple and manufacturing costs are low; the operating space for replacing the draw key is large, and labour intensity is low; and the draw key is symmetric top to bottom and can be inverted and interchanged. |
