Built-up type crankshaft

Abstract

The invention discloses a built-up type crankshaft comprising head and tail main journals, middle main journals, cranks and connection rod journals. A shaft hole is formed in the middle position of each crank. The shaft holes are used for being connected with shaft pins arranged on the end portions of the middle main journals and the head and tail main journals. A shaft hole is further formed in the position of the top end of one side of each crank, and the shaft holes in the positions of the top ends are used for fixing the connection rod journals. The outer side of each crank and the two ends of each middle main journal are each provided with scribed lines. The built-up type crankshaft is novel in design; by means of the interference fit method, the cranks, the main journals and the connection rod journals are combined together to obtain the required crankshaft; and combination of any phase position of the crankshaft is achieved by using reference lines and auxiliary lines for assembly in a cooperation manner, and practicability is high.

Description

technical field [0001] The invention relates to a crankshaft, in particular to a combined crankshaft. Background technique [0002] The crankshaft is the most important component in the engine. It bears the force transmitted by the connecting rod and converts it into torque through the crankshaft output and drives other accessories on the engine to work. The crankshaft is subjected to the joint 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 the bending torsional load. Therefore, the crankshaft is required to have sufficient strength and rigidity, and the surface of the journal needs to be wear-resistant, work evenly, and have good balance. [0003] The present crankshaft generally comprises two main journals, two crank arms and a connecting rod neck, one surface of the two crank arms is vertically connected with the two main journals respectively...

AI Technical Summary

Problems solved by technology

[0003] The present crankshaft generally comprises two main journals, two crank arms and a connecting rod neck, one surface of the two crank arms is vertically connected with the two main journals respectively, the connecting rod neck is arranged between the two crank arms, and the two The axes of the two main journals are on the same straight line, and the axes of the connecting rod journals are parallel to the axes of the main journals. The current engine structure is diversified, and the ordinary crankshaft cannot meet any combination, which has great limitations. At the same time, the accuracy of crankshaft combination is limited. lead to poor engine performance

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