Novel oil bag

In order to improve the connection stability and firmness of the oil bag and a motor, the novel oil bag comprises a bag wall, a bag bottom and a limiting clamp spring, a positioning structure is arranged on the outer side of the bag wall, the positioning structure comprises a positioning ring integrally formed with the bag wall, and a positioning groove is formed in the outer circumferential face of the positioning ring; the axial section of the positioning groove is of a rectangular or trapezoidal structure. 本申请涉及一种新型油囊，为了提高油囊与电机的连接稳定性与牢固性，包括囊壁、囊底及限位卡簧，所述囊壁外侧设有定位结构，所述定位结构包括与囊壁一体成型的定位环，定位环的外圆周面上设有定位槽；所述定位槽的轴向截面呈矩形或梯形结构。