Press-fitting tool for spark plug barrel of cylinder cover

Abstract

The invention discloses a press-fitting tool for a spark plug barrel of a cylinder cover. The press-fitting tool comprises a round tubular screwing sleeve, a press rod and an end surface press sleeve; the outer periphery of the top end of the screwing sleeve is provided with a flat position screwing part adaptive to a sleeve torque spanner; a radial positioning flange adaptive to and inserted with the aperture of a bottom hole of a cylinder cover oil atomizer is arranged at the lower part of the fastening sleeve; a clamping table edge adaptive to a barrel notch is arranged at the bottom end of the screwing sleeve; the press rod has a three-stage step shaft structure and comprises a large top end press head shaft, a middle penetrating middle shaft and a small bottom end shaft; the press rod is axially glidingly arranged in the fastening sleeve in a penetrating mode by the middle penetrating middle shaft; the upper end of the end surface press sleeve is fixed at the small bottom end shaft of the press rod; the lower end surface of the end surface press sleeve is a copper sleeve inner hole step pressing surface. The press-fitting tool for the spark plug barrel of the cylinder cover is simple and reasonable in structure and can ensure that the lower end surface of a copper sleeve is attached to the step surface of the bottom hole of the oil atomizer, thus further ensuring the copper fixing quality of the copper sleeve and the water cavity sealing quality of the cylinder cover; the cylinder cover does not need to be accurately positioned, the operation is convenient and the assembly efficiency is high.

Description

technical field [0001] The invention relates to the field of pressing the screw sleeve of the spark plug of the cylinder head, in particular to a tool for pressing the screw sleeve of the spark plug of the cylinder head. Background technique [0002] In order to meet the emission standards, the cylinder head of diesel engine generally adopts the four-valve technology, and some parts of the injector hole of the cylinder head adopt the structure of screw sleeve to compress the copper sleeve, that is, the upper end of the injector hole is designed with threads, and the copper sleeve is required to be pressed. , the lower end of the copper sleeve is close to the step surface of the bottom hole of the injector, and at the same time, the upper end of the copper sleeve is supported and fixed by a screw sleeve, thereby fixing the copper sleeve and sealing the water chamber of the cylinder head. [0003] The copper sleeve press-fit needs to be carried out on the press, and then the c...

AI Technical Summary

Problems solved by technology

[0003] The copper sleeve press-fit needs to be carried out on the press, and then the copper sleeve is released after the pressure is released, and then the screw sleeve is tightened to withstand the upper end of the copper sleeve. After the copper sleeve loses the pressure of the press, it is difficult to ensure the copper sleeve only by the top pressure of the screw sleeve. The lower end surface is close to the step surface of the bottom hole of the injector, which in turn affects the quality of the copper sleeve fixing and sealing the cylinder head water cavity; and the two steps of copper sleeve pressing and screw sleeve tightening are completed independently, and the operation procedure is complicated, which affects the assembly efficiency

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