Chuck type gearbox middle shell tool clamp

The utility model relates to a chuck type gearbox middle shell tool clamp, which belongs to the field of machine tool tools, and comprises a bottom plate arranged on a numerical control machining center workbench, two three-jaw chucks corresponding to mounting holes of a gearbox middle shell are arranged on the bottom plate, and extension shafts are rotationally connected to the positions, corresponding to bevel pinions of the two three-jaw chucks, of the bottom plate; the extension shaft and the small bevel gear are coaxially arranged, and the extension shaft can drive the small bevel gear to rotate. The situation that a three-jaw chuck is covered by a gearbox middle shell, so that a worker cannot flexibly adjust a bevel pinion conveniently is improved. 本申请涉及一种卡盘式变速箱中壳工装夹具，属于机床工装领域，包括设置于数控加工中心工作台上的底板，底板上设置有两个与变速箱中壳的安装孔相对应的三爪卡盘，底板对应两个三爪卡盘的小锥齿轮位置处均转动连接有延长轴，延长轴与小锥齿轮同轴线设置且延长轴能够带动小锥齿轮转动。本申请改善三爪卡盘被变速箱中壳罩住不便于工人灵活调整小锥齿轮的情况。