Diesel engine body crankshaft cylinder liner cavity sand core hoisting sling

Abstract

The invention discloses a sand core hoisting sling for a crankshaft cylinder liner cavity of a diesel engine body. The upper part of the tubular sling main body is bent, and the bent position bypasses the plane of the sand core and is in the middle of the "V"-shaped cylinder liner cavity of the sand core. , the difference between the bend and the plane is greater than half the thickness of the sand core, the top of the main body of the spreader is fixed with lifting lugs, and the bottom of the spreader is installed horizontally and forwardly from top to bottom. The distance between the pipe strings is equal to the distance between the upper pipe string lifting hole and the lower pipe string lifting hole in the middle of the crankshaft cavity at the lower part of the sand core. The rear part of the tool body passes through the center hole of the upper pipe string and is connected with the external eccentric rod. The diameter of the eccentric rod is consistent with the diameter of the upper pipe string and can be inserted into the lifting hole of the upper pipe string. The lower pipe string can be inserted To the lifting hole of the lower pipe, the surface of the eccentric column is threaded. The sand core hoisting sling for the crankshaft cylinder liner cavity of the diesel engine body is easy to manufacture, simple to operate, economical and practical.

Description

technical field [0001] The invention relates to the technical field of diesel engines, in particular to a sand core hoisting sling for a crankshaft cylinder liner cavity of a diesel engine body. Background technique [0002] In the integral casting process of the diesel engine body, the crankshaft chamber and the cylinder liner chamber of the body are composed of an integral sand core. Integral sand cores are produced with a core-making wire, and the sand cores are removed from the core box in a turning machine. The sand core is in a horizontal state when taken out, and needs to be erected when used. Due to the large size of the sand core (1300×1100×200mm) and the weight of about 700Kg, it is very difficult to erect and transport the core manually, which is labor-intensive and poor in safety, and it is easy to cause the sand core to be damaged, broken and scrapped. There is one kind in reality that there is no special spreader in the trial production of the sand core, and ...

AI Technical Summary

Problems solved by technology

Since the sand core is light at the upper end and heavy at the lower end, it has the characteristics of partial center of gravity and irregular dimensions. It is very difficult to manually find the center of gravity, and the safety is poor, and it is easy to cause damage to the sand core.

If a mechanical arm is used, the cost is high and the versatility is poor, and it cannot be well adapted to the situation of various types of diesel engine bodies, various shapes of sand cores, and mass production.

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