Single-cylinder dual-piston manipulator for inner hole

The invention provides a single-cylinder dual-piston manipulator for an inner hole, comprising a cylinder, a primary piston (21), a secondary piston (22) and a spring claw (3), the cylinder comprises a cylinder block (11), an end cover (12) disposed at the lower end of the cylinder and a piston guide sleeve (13) disposed on the inner wall of the cylinder block, the primary piston (21) is disposed in the middle of the cylinder block, the secondary piston (22) is disposed on the lower portion of the cylinder block (11), and both the upper and lower ends of the secondary piston (22) are provided with piston rods; in the cylinder structure, a traditional two-stage cylinder structure is simplified into a single-cylinder dual-piston structure, the two pistons divide a cylinder chamber into front, middle and rear chambers, enabling telescoping and grabbing of the claw; the manipulator is simple in structure, lighter in weight and high in practicality.