Auxiliary box intermediate shaft of automobile gearbox

The utility model discloses an automobile gearbox auxiliary box intermediate shaft which comprises an intermediate shaft body, the outer surface of the intermediate shaft body is fixedly connected with a protection cavity, the inner wall of the protection cavity is fixedly connected with a pressure-resistant copper pipe, and the outer surface of the pressure-resistant copper pipe is fixedly connected with a supporting spring. And one end of the supporting spring is fixedly connected with a supporting sleeve. The utility model has the following advantages and effects: the compression-resistant copper pipe is connected with the supporting springs, the supporting force and compressive strength of the compression-resistant copper pipe are improved, the supporting springs are fully distributed between the supporting sleeve and the compression-resistant copper pipe, and the heat-resistant material layer is filled in the gap between the supporting sleeve and the compression-resistant copper pipe, so that the protect