The invention relates to the field of vehicles, and discloses a speed reducer and a coaxial electric drive axle, the coaxial electric drive axle comprises a drive motor, an output shaft of the drive motor is fixedly sleeved with an outer gear, and the speed reducer comprises a shell, a differential mechanism and a planetary gear train; the differential mechanism is arranged in the shell and comprises a differential mechanism shell capable of rotating relative to the shell, the planetary gear train is arranged in the shell and comprises a planet carrier, a fixed gear ring and a planet wheel, the fixed gear ring is fixedly arranged on the inner wall of the shell, the planet wheel is meshed with the outer gear and the fixed gear ring, and the planet carrier is fixedly connected with a planet shaft of the planet wheel; the differential shell is fixedly connected with the planet carrier. The requirement for the assembly position precision of the duplex planet wheel is effectively lowered, the gear backlash is reduced, the working noise is lowered, meanwhile, the reduction ratio of the reduction gear is increased, the lubrication mode of the duplex planet wheel and the bearing in the duplex planet wheel is oil immersion lubrication, and the lubrication effect is good.
本发明涉及车辆领域,公开了一种减速装置和同轴式电驱动车桥,同轴式电驱动车桥包括驱动电机,驱动电机的输出轴上固定套接有外齿轮,减速装置包括壳体、差速器以及行星轮系,差速器设置于壳体内并包括可相对壳体旋转的差速器外壳,行星轮系设置于壳体内并包括行星架、固定齿圈以及行星轮,固定齿圈固定设置于壳体的内壁上,行星轮分别与外齿轮和固定齿圈相啮合,行星架与行星轮的行星轴固定连接,差速器外壳与行星架固定连接。本发明有效降低双联行星轮的装配位置精度要求,缩小齿侧间隙,降低工作噪声,同时,增大减速装置的减速比,而且,双联行星轮及双联行星轮内的轴承的润滑方式为浸油润滑,润滑效果良好。
Reduction gear and coaxial electric drive axle
减速装置和同轴式电驱动车桥
2022-12-30
Patent
Elektronische Ressource
Chinesisch