Hydraulic four-jaw double-acting centering chuck

Abstract

The invention relates to a hydraulic four-jaw double-acting centering chuck. The hydraulic four-jaw double-acting centering chuck comprises a chuck body, clamping jaws, a sliding base, T-shaped blocks, a first wedge core sleeve and a second wedge core sleeve, wherein the sliding base is installed on the chuck body in a sliding mode, the clamping jaws are indirectly fixed to the sliding base through the T-shaped blocks, every two opposite clamping jaws in the four clamping jaws form one group in pairs, the first wedge core sleeve and the second wedge core sleeve are installed in the chuck body,a cylindrical cavity is formed in the chuck body, the first wedge core sleeve is matched with one group of clamping jaws in a wedge shape and then installed in the cylindrical cavity in a sliding mode, a square cavity is formed in the upper end of the first wedge core sleeve, the second wedge core sleeve is matched with the other group of clamping jaws in a wedge shape and then installed in the square cavity in a sliding mode, and a double-acting oil cylinder on the same side is mounted on a lathe, and independently pulls the first wedge core sleeve and the second wedge core sleeve to drive the two groups of clamping jaws in the opposite directions to move to clamp a square workpiece. The two groups of clamping jaws form a double-acting effect and conduct clamping from the side faces of abreaking hammer cylinder body correspondingly, the requirement for adjusting the positions of the clamping jaws by an operator is lowered, and meanwhile, the service life of the oil cylinder can be prolonged.

Description

technical field [0001] The invention relates to the technical field of fixtures, in particular to a hydraulic four-jaw double-action centering chuck. Background technique [0002] Breaking hammer is a kind of engineering machinery commonly used in construction. The shape of the breaking hammer cylinder is cuboid, and there is an inner hole that needs to be processed inside, and the center of the inner hole is eccentric to the center of the cuboid. [0003] At present, the processing of the eccentric inner hole on the cylinder of the breaking hammer generally adopts a four-jaw self-centering hydraulic chuck, which is clamped from the four sides of the cylinder. Since the cylinder of the breaking hammer is rectangular and processed The inner hole is located at the eccentric position of the cylinder body. The operator needs to adjust the position of the four jaws according to the size of the workpiece. At the same time, it is necessary to add spacers on the jaws to match the ec...

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the processing of the eccentric hole on the cylinder block of the breaker in the prior art, first, when the claws clamp the cylinder block of the breaker, the adjustment of the claws is complicated, the operation time is long, the requirements for the operator are high, and the work efficiency is low. The second is that the clamping force of the jaws is difficult to increase, and the clamping effect is poor. The present invention provides a hydraulic four-jaw double-centering chuck, which can independently control the movement of two groups of opposing jaws to form a double-action effect. The side of the hammer cylinder is clamped, which reduces the time for the operator to adjust the claws, reduces the requirements for the operator, and greatly improves the work efficiency. At the same time, the double-acting oil cylinder pulls the two sets of claws to move independently to the hammer. The cylinder is clamped, and the clamping force of the chuck is doubled. Compared with the traditional hydraulic four-jaw chuck, the double-acting cylinder can maintain a normal pressure to achieve a stable clamping effect, and no need to increase the cylinder pressure. , the service life of the cylinder is greatly increased

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