Fuel tank cap screwing mechanism and refueling robot

The invention relates to the field of automatic oiling machines, in particular to an oil tank cap screwing mechanism and an oiling robot, and is characterized in that the oil tank cap screwing mechanism comprises a pneumatic clamping jaw and a linear driving part used for driving the pneumatic clamping jaw to move in a reciprocating mode in the direction perpendicular to the moving direction of two clamping heads of the pneumatic clamping jaw; the rotating assembly is used for driving the pneumatic clamping jaw to rotate around a symmetric axis between two clamping heads of the pneumatic clamping jaw in a fixed-axis mode, and the rotating driving piece is used for providing power for the rotating assembly. The purpose of automatically screwing the fuel tank cap to reduce the investment of workers is achieved. 本申请涉及自动加油机领域，尤其是涉及一种油箱盖旋拧机构及加油机器人，其技术方案要点是：包括气动夹爪以及用于驱动气动夹爪沿垂直于气动夹爪的两个夹头移动方向往复移动的直线驱动件，还包括用于带动气动夹爪围绕气动夹爪的两个夹头之间的对称轴定轴转动的转动组件以及为转动组件提供动力的旋转驱动件；达到了实现油箱盖的自动旋拧以减少工作人员的投入的目的。