Manual self-locking pressing clamp for columnar workpiece

Abstract

The invention discloses a manual self-locking pressing clamp for a columnar workpiece. The manual self-locking pressing clamp comprises a bottom plate, a first V-shaped groove cushion block and a second V-shaped groove cushion block and further comprises a first threaded sleeve, a first screw, a second threaded sleeve, a second screw, a first n-shaped support and a second n-shaped support, wherein the first threaded sleeve and the first screw are matched, and the second threaded sleeve and the second screw are matched. The first n-shaped support and the second n-shaped support are symmetrically arranged on the upper side of the bottom plate. The first threaded sleeve is fixedly arranged on the first n-shaped support. The first screw is arranged in the first threaded sleeve. A first V-shaped groove pressing head is rotationally arranged at the lower end of the first screw. The second threaded sleeve is fixedly arranged on the second n-shaped support. The second screw is arranged in the second threaded sleeve. A second V-shaped groove pressing head is rotationally arranged at the lower end of the second screw. The manual self-locking pressing clamp has the beneficial effects that the design is reasonable, workpiece clamping is reliable, reinforcement is large, and the self-locking performance is good; the structure is simple, operation is convenient, the service life is long, and the application range is wide; and the production cost is low, and usage and popularization are facilitated.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and relates to a simple clamp, in particular to a manual self-locking clamp for a cylindrical workpiece. Background technique [0002] At present, during the machining of columnar workpieces, the most commonly used clamping tool is a three-jaw chuck because the outer contour of the columnar workpiece has a certain curvature. The three-jaw chuck is composed of a chuck body, movable jaws and jaw driving mechanism. Under the guide part of the three claws on the three-jaw chuck, there are threads that mesh with the plane threads on the back of the bevel gear. When the small bevel gear is turned with a wrench through the square hole, the bevel gear rotates, and the plane threads on the back simultaneously Drive the three jaws to approach or withdraw from the center to clamp workpieces with different diameters. However, if the three-jaw chuck is used for a long time, the chuck will wear ...

AI Technical Summary

Problems solved by technology

Under the guide part of the three jaws on the three-jaw chuck, there are threads that mesh with the plane threads on the back of the bevel gear. When the small bevel gear is turned with a wrench through the square hole, the bevel gear rotates, and the plane threads on the back simultaneously Drive the three jaws to approach or withdraw from the center to clamp workpieces with different diameters. However, if the three-jaw chuck is used for a long time, the chuck will wear out, and the three jaws will also appear bell-mouthed, making the three jaws deviate from the chuck. In addition, the three-jaw chuck still has the disadvantages of large volume, heavy weight, and difficult disassembly.

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