Rapid clamping fixture with adjustable pressing force

Abstract

The invention relates to a rapid clamping fixture with adjustable pressing force. The middle of a connecting rod is connected with a pressing plate in a penetrating manner, and the lower end of the connecting rod is fixedly connected with a working table through a T-shaped nut; a long kidney-shaped hole is formed in a straight slot in the upper portion of the connecting rod, and an eccentric semicircular block is movably connected with the long kidney-shaped hole through a hinge pin; an adjusting bolt and a locking nut are arranged at the upper end of the connecting rod, and a bevel washer arranged on the connecting rod in a sleeving manner is arranged on the pressing plate; and the part, between the pressing plate and the working table, of the connecting rod is sleeved with a reset spring, and a rotating handle is arranged on the eccentric semicircular block. According to the clamping fixture, through the eccentric semicircular block, a workpiece is rapidly clamped, the bevel washer is utilized for conveniently adjusting the clamping force, a friction angle on the contact position of the bevel washer and the eccentric semicircular block is used for locking, and the pressing force of the eccentric semicircular block can be fine adjusted through the adjusting bolt and the locking nut after the workpiece with elastic deformation is pressed; and due to the fact that the part, between the pressing plate and the working table board, of the connecting rod is sleeved with the reset spring, after the eccentric semicircular block is loosened, the pressing plate automatically loosens the workpiece under the effect of the reset spring.

Description

technical field [0001] The invention relates to a fast clamping fixture, in particular to an eccentric fast clamping pressure plate with adjustable pressing force. Background technique [0002] In metal cutting, after the workpiece is positioned, it is fixed and clamped with a pressure plate, and then the workpiece is processed with a tool. The commonly used fixed pressure plate is fastened with bolts, which is not efficient in use, and after repeated use, the hex nuts in the bolts will be deformed, and finally become round, causing the wrench to slip and cannot be tightened; and the thread and If the threads of the hex nut are repeatedly engaged, it will cause thread wear and rotten teeth, making it impossible to lock and shorten the service life. Chinese Utility Model Patent No.: 201120103422.3, which discloses an eccentric fast clamping pressure plate. One end of the pressure plate is provided with a recessed knife groove, and a connecting rod is pierced on the pressure ...

AI Technical Summary

Problems solved by technology

Although the pressure plate can quickly clamp the workpiece and solve the defects of the commonly used fixed pressure plate, the pressure plate uses the eccentricity of the semicircular key to compress the workpiece. The clamping force and clamping displacement of the workpiece can only be adjusted by adjusting the connecting rod, which is extremely inconvenient. Moreover, when the clamping force is too large, the pressure plate cannot be released after the half-round key is released.

In addition, it cannot be applied to the timely fine-tuning of the pressing force after the workpiece with elastic deformation is pressed.

Images