Light-weight hydraulic tongs

• Main Authors: ZUOSHAN JIANG, XIAYU ZHOU
• Format: Patent
• Language: English
• Published: 26.03.2003
• Edition: 7
• Subjects: HAND TOOLS; MANIPULATORS; PERFORMING OPERATIONS; PORTABLE POWER-DRIVEN TOOLS; TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FORFASTENING, CONNECTING, DISENGAGING OR HOLDING; TRANSPORTING

The utility model discloses a pair of portable hydraulic tongs, comprising a clamp, draw-in gears, an oil sac, a load sleeve-and-unloading valve handle, a power handle and a combination body of a pump, a cylinder and a valve. The clamp inside which different draw-in gears are installed is connected to a piston end disposed in the axial direction of the combination of a pump, a cylinder and a valve via a nut and a snap ring. The oil sac is connected to an oil inlet end of the combination of a pump, a cylinder and a valve through an elastic ring and the external of the air sac is provided with an oil sac sleeve. The power handle is connected to the radial direction of the combination of a pump, a cylinder and a valve, and the position is between the clamp and the oil sac. The inner combination of a pump, a cylinder and a valve is provided with a piston, an oil-attacking plunger and a load-unloading valve core. The screw placed at the external end of the load-unloading valve core is sleeved with a valve core cover which covers the load-unloading valve handle. The rotation shaft of the load-unloading valve handle is inserted into a boss of the combination of a pump, a cylinder and the outer end of the oil-attacking plunger is provided a C-typed groove opening engaged with a rotation shaft sleeve of an oil-attacking piston of a clamping rod installed in the power handle. The hydraulic tongs has the advantages of compact structure, portability, small volume, and simple operation, the utility model is capable of being adaptable for the working of clamping, sealing and cutting tubes with different sizes and forms.