A New Type of Flexible Four-jaw Chuck

Abstract

The invention discloses a novel flexible four-jaw chuck comprising a chuck body, a scroll, four small bevel gears engaged with the scroll, four linked jaws which are driven through the scroll and which are distributed and arranged on the chuck body within 90 DEG included angles, four steering blocks arranged on the linked jaws, four screws and four sliding jaws. The sliding jaws match with the screws which are located in arc grooves of the steering blocks, and stop rings fixed on the steering blocks limit the screws to move upwardly and axially. The novel flexible four-jaw chuck comprises four worms, four worm gears provided with through holes, and four T-shaped countersunk head rods. Thus, all functions of an existing flexible four-jaw chuck are provided to the novel flexible four-jaw chuck, the linkage function can be implemented optionally, and the steering block 1 can steer at optional degrees, so that effective clamping of different irregular workpieces is realized actually, efficiency of mounting and demounting workpieces is improved greatly through the linkage function, and production efficiency and practicality are improved.

Description

technical field [0001] The invention relates to a machining workpiece chuck, in particular to a novel flexible four-jaw chuck capable of clamping irregular workpieces. Background technique [0002] General-purpose fixtures mainly include vices, three-jaw chucks, four-jaw chucks, etc., which are mainly used for clamping and fixing workpieces (or blanks) with regular shapes, but for some workpieces with irregular or complex shapes (or blank), it is obviously impossible to achieve reasonable clamping with the above three fixtures. However, unreasonable clamping often reduces the machining accuracy, damages the workpiece (or blank), and eventually causes a large error in the size of the workpiece. Sometimes even the processing process is full of danger due to insufficient clamping force. Not only that, general fixtures often need to be disassembled repeatedly to clamp regular workpieces (or blanks) of different shapes, and the process is cumbersome. [0003] The flexible four...

AI Technical Summary

Problems solved by technology

However, when the chute of the middle block and the direction of the centripetal movement of the linkage jaws are not collinear, the sliding fit between the T-shaped turbine and the middle block will interfere with the movement of the linkage jaws during automatic centering, resulting in It is necessary to readjust the angles of the four middle blocks and the feed rate of the sliding jaws every time, which makes the unloading and clamping of the workpiece very inconvenient and reduces the production efficiency; moreover, the middle block can only achieve 73 degrees Steering, for workpieces with large irregularities, clamping cannot be achieved

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