Rock drill bit

The utility model discloses a rock drill bit, including supporting seat, rotary -cut drill bit, the outside extension is equipped with protective seat on the supporting seat, the installation face of rotary -cut drill bit is connected with protective seat is inboard, and the working face of rotary -cut drill bit is provided with the rotary -cut sword towards the drilling rod outside on the working face, the utility model discloses a design of rotary -cut drill bit to the rock is assaulted, is crushed, is cut to the rotary -cut mode, and the broken rock rate in center is high, and mechanical drilling speed height has better dynamic performance, and it is even to wear and tear, has improved the atress of drill bit, has increased the life of drill bit when guaranteeing to improve broken rock rate. 本实用新型公开了种岩石钻头，包括支撑座、旋切钻头，所述支撑座上向外延伸设有防护座，所述旋切钻头的安装面与防护座内侧连接，旋切钻头的工作面朝向钻杆外侧，工作面上设置有旋切刃，本实用新型采用旋切钻头的设计，以旋切方式冲击、压碎、切削岩石，中心破岩率高，机械钻速高，具有更好的动力学性能，磨损均匀，改进了钻头的受力，确保提高破岩率的同时增大了钻头的使用寿命。