| 摘要 |
In the invention, there is provided a differential gear case that includes a container housing of a differential gear, the container housing having on an outer surface thereof an annular flange that extends around an axis of rotation of the container housing, and one of two areas of the container housing that are separated by the annular flange being formed with an opening that is communicated with a containing space formed in the container housing. The area of the container housing that is formed with the opening is provided with a fixing portion used for fixing the differential gear case. The fixing portion comprises two flat surfaces that are in parallel with a plane surface containing the axis of rotation of the container housing and arranged around the axis of rotation keeping a space therebetween, the fixing portion being integrally provided by an outside edge portion of a side of the edge portion defining the opening, which faces the flange. The fixing portion is formed with an upper end surface that constitutes a common surface with the edge portion. |
