Opening and closing clamp for oil tank cover

The invention provides an opening and closing clamp for an oil tank cover. The opening and closing clamp comprises a body frame, an operation rod and an execution hook. The body frame is connected to an oil tank opening and provided with guiding structures, the execution hook comprises a sliding rod and a poking hook, the sliding rod can be linearly and movably connected to the body frame through the guiding structures, and the poking hook is connected to the oil tank cover. A support extends at the part, facing the interior of the oil tank opening, of the body frame, and is provided with a rotating shaft supporting point, and the operation rod forms a lever structure through the rotating shaft supporting point and can be connected to the support in a swinging mode. One end of the operation rod is connected with the sliding rod. When the operation rod swings, the execution hook can linearly move on the body frame to drive the oil tank cover to be opened or closed. By the adoption of the opening and closing clamp, the problems that in existing spraying, quality is poor, and the input-output ratio is high are solved.