Synchronous regulation structure for stroke of pressing machine

Abstract

The invention relates to a synchronous regulation structure for a stroke of a pressing machine in the technical field of pressing machines. The synchronous regulation structure comprises a group of crank shafts, two groups of connecting rods and two groups of eccentric distance adjusting devices, wherein the two groups of connecting rods are respectively connected with synchronous driving slide block mechanisms through the two groups of eccentric distance adjusting devices and the crank shafts; each eccentric distance adjusting device comprises an eccentric sleeve, a lock sleeve, a pneumatic device, a spring and a connecting rod cap, wherein the eccentric sleeve is sleeved at the periphery of the connecting rod neck journal of the crank shaft and can rotate and slip along the axial direction of the connecting rod neck journal; two end surfaces of the eccentric sleeve are respectively provided with lateral teeth; lateral teeth matched with the end surfaces of the eccentric sleeve are respectively arranged on the end surfaces, corresponding to the eccentric sleeve, of the lock sleeve and connecting rod cap arranged at two ends of the eccentric sleeve; and the pneumatic device and the spring can drive the eccentric sleeve to respectively be meshed with the lateral teeth of the lock sleeve and the connecting rod cap so as to realize normal punching motion and stroke regulation of the slide blocks. According to the synchronous regulation structure provided by the invention, the connecting rods and the eccentric distance adjusting devices are driven to carry out synchronous action through the rotation of the crank shafts, thus the synchronous and accurate regulation of the stroke of the slide blocks of the connecting rods is realized, and the regulation precision is high.

Description

technical field [0001] The invention relates to the technical field of presses, in particular to a double-point or four-point press stroke synchronous adjustment structure. Background technique [0002] At present, the mechanical presses used at home and abroad are divided into fixed-stroke presses and adjustable-stroke presses according to whether the stroke amount is variable. The stroke-adjustable presses are mainly single-point crank presses, and double-point crank presses are more common. One-point and four-point stroke adjustable presses are difficult to synchronize and accurately adjust the precision, which limits the scope of use of the press. [0003] The adjustment structure of the stroke adjustable press in the prior art generally uses the eccentric sleeve inside the rotating connecting rod to change the relative rotation angle between the eccentric sleeve and the eccentric shaft to adjust different eccentric distances, so as to realize stroke adjustment. The act...

AI Technical Summary

Problems solved by technology

This structure is only suitable for single-axis double-point structure, and the structure is complex, the adjustment steps are cumbersome, the adjustment error is large, and the adjustment accuracy cannot be guaranteed.

Other similar eccentric sleeve adjustment structures also have the problem of poor adjustment synchronization and accuracy

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