Self-braking flat tongs

The utility model relates to a pair of self-braking flat tongs, which comprises a bottom plate and a positioning block arranged on the bottom plate, and is characterized in that the positioning block is arranged in the middle of the bottom plate, the bottom plate is provided with side plates which are oppositely arranged on two sides of the positioning block, and the two side plates are connected with the positioning block through guide rods which are oppositely arranged. Clamping blocks are arranged at the ends, facing the positioning block, of the two side plates and located on the guide rod respectively, and driving structures for driving the clamping blocks to be close to or away from the positioning block along the guide rod are installed at the ends, away from the clamping blocks, of the side plates. And the production efficiency is improved. 本实用新型涉及一种自制动平口钳，包括底板以及设置于底板上的定位块，其特征在于：所述定位块设置于底板中部，所述底板在定位块两侧设置有相对设置的侧板，两侧板与定位块之间通过相对设置的导向杆连接，两侧板朝向定位块的一端在导向杆上分别设有夹持块，侧板远离夹持块的一端安装有驱动夹持块沿导向杆靠近或远离定位块的驱动结构，本实用新型的有益