| 摘要 |
The optional equipment for assembling tool is to be arranged on the working part of the bit to cover it and to inhibit it from slipping off the means, such as screwhead, to be mounted. The equipment contains a hollow shaft (1) having two gradually created extending fittings, the greater one (11) and the smaller one (12). On the hollow shaft (1), at least one compressive spring (2) is arranged and at least one hollow cover (3) is mounted. The inner surface of the cover (3) is equipped with at least one inner reduction (31), wherein the compressive spring (2) is arranged between the first annular surface of this reduction (31) and the smaller extending fitting ( 12) of the hollow shaft (1). The opposite annular surface of the inner reduction (31) at least partly bears on the lock ring (4) arranged on the hollow shaft (1). |
