Clamping mechanism for narrow space

The utility model provides a clamping mechanism for a narrow space. The clamping mechanism comprises a base block; the fixed claw is fixedly installed on one side of the base block, and a sliding groove is formed between the end face, facing the base block, of the fixed claw and the end face, facing the fixed claw, of the base block; the movable claw is provided with a main body part and a head part connected with the main body part, the main body part is in clearance fit with the sliding groove, and the head part penetrates out of the sliding groove; a first damping part is arranged between the end face, facing the head, of the main body part and the sliding groove, the end face, deviating from the head, of the main body part abuts against the first end of a rotating part, and the first end of the rotating part can rotate around a shaft under driving of a driving assembly so that the main body part of the movable claw can slide relative to the sliding groove. Therefore, the head of the movable claw is driven