New energy automobile speed reducer gear box

The utility model discloses a new energy automobile speed reducer gear box which comprises a butt joint flange and an input shaft sleeve, the butt joint flange is installed at the front end of the input shaft sleeve, an input gear box is arranged at the rear end of the input shaft sleeve, and an auxiliary heat dissipation device is connected to the outer portion of the input gear box in a sleeved mode. A main gear box is arranged at the rear end of the input gear box, a novel auxiliary heat dissipation device is additionally arranged outside the input gear box of the speed reducer gear box of the new energy automobile, and the novel auxiliary heat dissipation device can assist the input gear box to conduct rapid heat dissipation. Meanwhile, normal installation and work of the speed reducer gear box of the whole new energy automobile cannot be affected, and the novel auxiliary heat dissipation device can rapidly absorb and rapidly guide high-temperature heat generated when the input gear box works; therefore,