Crankshaft assembly with vibration reduction function and engine

Abstract

The crankshaft assembly with the vibration reduction function comprises a crankshaft body, the front end of the crankshaft body is provided with a crankshaft journal, the crankshaft assembly further comprises a rubber ring and an inertia ring, the crankshaft journal is provided with an installation protruding ring protruding outwards in the radial direction, the installation protruding ring is sleeved with the rubber ring in an interference mode, and the inertia ring is arranged on the rubber ring. The inertia ring is sleeved on the rubber ring in an interference manner; the crankshaft assembly with the vibration reduction function has the vibration reduction function, and is short in length and light in weight. The invention further discloses an engine which comprises a cylinder body and a front cover arranged on the front side of the cylinder body and further comprises the crankshaft assembly with the vibration reduction function, and the crankshaft assembly with the vibration reduction function is connected with the cylinder body. According to the engine, engine oil leakage sources can be reduced, the oil leakage risk can be reduced, parts such as a front oil seal and bolts can be omitted, the structural complexity of the engine is simplified, light weight of the engine is facilitated, and the cost of the engine is reduced.

Description

technical field [0001] The invention relates to an engine, in particular to a crankshaft assembly with a vibration damping function and an engine. Background technique [0002] The engine is usually provided with a crankshaft torsional damper assembly. The main purpose of the crankshaft torsional damper assembly is to reduce crankshaft torsional vibration and reduce noise and vibration, and also to provide power to the front-end wheel train accessories. Crankshaft torsional vibration absorber assemblies can be divided into dynamic, damped and composite types according to different vibration reduction methods. Among them, the crankshaft torsional vibration absorber assembly with rubber damping structure is widely used in gasoline engines due to its simple structure and low cost. like figure 1 As shown, the existing crankshaft assembly 1 is arranged inside the existing engine cylinder block 2, and the small end of the front end of the crankshaft of the existing crankshaft ass...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, the existing crankshaft assembly 1 is arranged in the inside of the existing engine block 2, and the crankshaft front end small end of the existing crankshaft assembly 1 protrudes from the existing front cover 3, and the small end of the crankshaft front end Install the upper crankshaft torsional damper assembly 6 through the bolt 5 to realize the transmission of the front gear train and reduce the torsional vibration of the shaft system. The front oil seal 4 is set, and the crankshaft torsional damper assembly 6 is designed. The hub and pulley of the torsional damper assembly are usually cast in gray cast iron. Due to factors such as larger outer diameters, the weight and rotational inertia of the pulley of the crankshaft torsional damper assembly 6 are greatly increased, and the increase in the inertia of the pulley will seriously affect the effect of reducing the unevenness of the engine speed

With the application of modern engine electrification, the accessories of the front-end gear train are all electronic. Among them, the application of electronic water pump and electronic oil pump makes the front-end gear train of the engine not need the output torque of the crankshaft torsional damper assembly 6, so the crankshaft torsional damper The function of the assembly 6 is only to reduce the vibration of the engine shafting. Therefore, in order to reduce the torsional vibration of the entire shafting, the crankshaft torsional damper assembly 6 of the conventional existing engine cancels the connection with the front-end gear train attachment. The connected structure only assembles the crankshaft torsional damper assembly 6 on the small end of the front end of the crankshaft to reduce the torsional vibration of the engine shafting, which makes the crankshaft torsional damper assembly 6 single and independent The crankshaft torsional damper assembly 6 makes the structure of the engine complex, which is not conducive to light weight and high cost

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