关键词: 工程机械；微观修形；传递误差；振动响应；NVH；MASTA

Abstract: Aiming at the transmission development project of a pure electric construction machinery, the dynamic model of the transmission system of the gearbox gear is established in MASTA, and the vibration and noise caused by the transmission error of the gearbox gear are studied. The influence of the flexibility of the gearbox shell, shaft and gear spokes on the transmission error is explored by using the full finite element mesh technology, and the transmission error of the gear is reduced and the contact state of the tooth surface is improved through micro modification, The vibration response of the transmission is reduced. The results show that the vibration response of the transmission can be significantly reduced and the noise, vibration, harshness (NVH) performance of the transmission can be improved by appropriately increasing the micro modification parameters of the gear teeth. It provides a basis for controlling the vibration response of the gearbox at the initial stage of design, and provides a solution to the abnormal sound of the whole vehicle at the later stage, which has strong engineering applicability.

Key words: Construction machinery; Micro shaping; Transmission error; Vibration response; NVH; MASTA