Embedded engine body sewing bolt structure and assembly technology thereof

Abstract

The invention relates to an embedded engine body sewing bolt structure which comprises an embedded nut sleeve, a screw rod, an upper crankcase and a lower crankcase; the embedded nut sleeve is provided with a screw cap, a plain shaft and a threaded blind hole assembled with threads of the screw rod; the screw rod is provided with a smooth rod, upper outside threads, lower outside threads and a clamping face; a through hole assembled with the plain shaft of the embedded nut sleeve and the screw rod is formed in the upper crankcase; and the threaded blind hole assembled with the lower outside threads of the screw rod is formed in the lower crankcase. The screw rod is screwed and assembled on the lower crankcase through the threads, the upper crankcase is installed on the lower crankcase and enables the screw rod to be placed in the through hole of the upper crankcase, and the embedded nut sleeve is assembled in the through hole of the upper crankcase and is screwed and assembled with the screw rod through the threads, so that the upper crankcase and the lower crankcase are sewed to each other. The embedded engine body sewing bolt structure can remarkably improve the reliability of an engine body sewing structure.

Description

technical field [0001] The invention belongs to the field of engine structure design, and in particular relates to an embedded engine body suture bolt structure and an assembly process thereof. Background technique [0002] The body is the skeleton of the diesel engine, and its main function is to support the moving parts of the engine, and form water channels and oil channels to ensure the cooling and lubrication of the engine. The body is also the main carrier for the installation of various accessories of the engine, and at the same time serves as a support for the engine to be installed on the car body. The diesel engine body is mainly composed of upper crankcase, lower crankcase, body suture bolts, main bearing bush, fuel injection pump drive bushing and other components. [0003] The body of a diesel engine is mainly connected to the upper crankcase and the lower crankcase through suture bolts, which are key parts of the engine. The reliability of the body suture bol...

AI Technical Summary

Problems solved by technology

Although the body suture bolts have high tensile strength, due to the vibration load generated by the engine during operation, when the natural frequency of a certain order of vibration of the body suture bolts in the installed state is equal to or close to the vibration excitation frequency of the engine body suture parts, The body suture bolts will resonate, which will cause vibration fatigue fracture

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