Three-jaw chuck offering clamping force via lever

Abstract

The invention provides a three-jaw chuck offering clamping force via a lever. The three-jaw chuck offering clamping force via the lever comprises a fixture body, a front tip and a jack catch, the front tip vertically penetrates through the centre of the fixture body, the jack catch is mounted in the radial groove of the fixture body, a fulcrum floating lever is transversely arranged in the fixture body, the front end of the fulcrum floating lever is connected with the jack catch, the rear end of the fulcrum floating lever is provided with a chamber composed of a plunger I, a plunger II and a passage, the chamber is filled with the flexible medium, the plunger II props against the rear end of the fulcrum floating lever, and the plunger I contacts the bolt above the same. The trace is totally avoided on the parts, the clamping force is stable and firm, and the processing precision is guaranteed; the three-jaw chuck offering clamping force via the lever is simple in structure, low in cost, convenient to operate, wide in range of application and large in market potential.

Description

technical field [0001] The invention relates to a three-jaw chuck for clamping force provided by a lever, which belongs to the field of machinery. Background technique [0002] When processing machine tools, some shaft parts do not have high requirements on the surface quality and position accuracy of their two ends, and the use of end-face-driven top clamping inevitably leaves a claw pressure on one end face of the workpiece. Marks are generally allowed. However, not all shaft parts can leave marks on their cross-sections. For some shaft parts with special requirements, this type of drive center clamping is not suitable. Because the existing general chuck has no fixed force in the axial direction, the workpiece is not reliable and the precision is low. The force provided by centrifugal chucks and pneumatic chucks on the market is unstable, and the three chucks cannot provide a continuous and stable force, resulting in unreliable fixation of the workpiece, and the ac...

AI Technical Summary

Problems solved by technology

However, not all shaft parts can leave traces on their cross-sections. For some shaft parts with special requirements, this type of drive center clamping is not suitable.

The existing general chuck has no axial and fixed force, so the workpiece is not reliable, resulting in low precision

The force provided by centrifugal chucks and pneumatic chucks on the market is unstable, and the three chucks cannot provide a continuous and stable force, resulting in unreliable fixation of the workpiece, and the accuracy cannot be guaranteed, and most of the mechanisms are complex. The cost is high, so there is an urgent need for a chuck with a simple and reasonable process.

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