Mechanical press crankshaft connection rod fastening device

Abstract

A mechanical press crankshaft connection rod fastening device is used for connecting a connection rod cover with a connection rod body, the connection rod cover is internally provided with an unthreaded hole, and the connection rod body is internally provided with internal threaded holes. The mechanical press crankshaft connection rod fastening device comprises a plurality of threaded connection rods which are connected between the connection rod body and the connection rod cover and arranged at intervals, and nuts which are arranged on threaded connection rod bodies in a sleeving mode; the threaded connection rods are internally provided with heating channels, the positions, perpendicular to the internal threaded holes, of the interiors of the threaded connection rod bodies are provided with locking channels and cylindrical pins in the heating channels, and the positions corresponding to the ends, provided with the heating channels, of the threaded connection rods are provided with stretching devices; the interior of the fastening device heats the threaded connection rods through the heating channels, through coaction of the metal thermal expansion and cold shrinkage principle andthe mechanical stretching prestress deformation technique, the fastening device cooperates with locking key plates and the cylindrical pins, thus, the connection rod cover and the nuts are fastened through the locking key plates, loosening of the connection rod cover and the nuts is prevented, the pretightening force between the connection rod cover and the connection rod body is increased, and the fastening effect is improved.

Description

technical field [0001] The invention relates to the technical field of mechanical presses, in particular to a crankshaft connecting rod fastening device of a mechanical press. Background technique [0002] The crankshaft connecting rod is one of the main parts of the mechanical press. At present, the main fastening method is to elastically deform the elastic washer on the locking bolt to prevent loosening, and at the same time apply anti-loosening agent on the lower end of the double-ended stud. Anti-loose. But for the hot forging mechanical press, the high temperature of its working environment will lead to the failure of the anti-loosening adhesive. Obviously, it is not feasible to apply the anti-loosening adhesive on the lower end of the stud. The existing anti-loosening method by using elastic washers between the studs and the bolts is currently a commonly used method, and this method is more convenient for ordinary nuts to prevent loosening and disassembly, but for mec...

AI Technical Summary

Problems solved by technology

In the case of shock, vibration and heavy load, long-term use and continuous shock and vibration, the double-ended studs and nuts often loosen, resulting in the gradual reduction or even elimination of the pre-tightening force, and at least the connecting rod cover and the connecting rod or connecting rod. Increased clearance between rod cover and connecting rod body

If it is serious, it will cause the double-headed stud and the nut threaded connection to fail, loosen or break off, resulting in a safety accident caused by high-altitude flying

In addition, in order to further prevent loosening, on this basis, the root of the double-ended stud is further prevented from loosening by tightening the set screw externally. This method not only causes thread damage at the root of the double-ended stud, but also has a general locking effect and poor reliability. , cannot meet the long-term use needs of forging presses, and cannot have the disadvantage of not being able to be reused

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