Crankshaft assembly

Abstract

The invention discloses a crankshaft assembly, and relates to the technical field of engine crankshafts. The crankshaft assembly comprises a crankshaft, a balance part and a positioning ring. The crankshaft comprises a main shaft and a plurality of crank throw assemblies, the main shaft comprises a plurality of main shaft necks which are arranged at intervals and are coaxial, each crank throw assembly comprises a connecting rod neck and two crank arms, the first ends of the two crank arms are connected to one end of the connecting rod neck, and a first counter bore is formed in the second end of at least one crank arm; the two crank arms are respectively connected with the two adjacent main journals, and the connecting rod journals and the main journals are not coaxially arranged; the balance part is detachably arranged at the second end of the crank arm, and a second counter bore right opposite to the first counter bore is formed in the balance part; one end of the positioning ring is arranged in the first counter bore, and the other end is arranged in the corresponding second counter bore. The crankshaft assembly can ensure the accuracy of the position of the balance piece and prevent the balance piece from interfering with the piston.

Description

technical field [0001] The invention relates to the technical field of engine crankshafts, in particular to a crankshaft assembly. Background technique [0002] The crankshaft is one of the most important parts in the engine. It is subjected to the combined action of the centrifugal force of the rotating mass, the periodically changing gas inertial force and the reciprocating inertial force, so that the crankshaft is subjected to bending and torsional loads. The crankshaft rotates at a high speed during operation, and the balance piece is used to adjust the balance. The purpose of the balance is to reduce the vibration amplitude and frequency after the crankshaft rotates at a high speed. [0003] The connecting rod is mounted on the connecting rod journal of the crankshaft, and the connecting rod journal is separated from the center of the main journal by a certain distance. Since the above two journals are not concentric, when the crankshaft rotates, the inertial mass of t...

AI Technical Summary

Problems solved by technology

[0004] Due to assembly accuracy and other reasons, the connection between the balancer and the crankshaft is prone to deviation, resulting in too small a gap between the balancer and the piston, and interference is likely to occur during rotation

[0005] In view of the above problems, it is necessary to develop a crankshaft assembly to solve the problem that the connection between the balancer and the crankshaft is prone to deviation, resulting in interference between the balancer and the piston during rotation

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