Patent ID: 7633199
Filing Date: 2009-12-15
Classification: H02K

Abstract:
1. A direct drive torque motor comprising: a main shaft with plural stages and a external thread portion successively tapered from one end to the other end of the main shaft, the external thread portion being formed at an end of the main shaft; a brake assembly with an inner side positioned against the stages of the main shaft, and an outer side of the brake assembly being formed with a positioning portion; a bearing assembly including a plurality of oil seals, a main bearing, and an assistant roller bearing, the main bearing being positioned on the stages of the main shaft and pressed against the brake assembly, the assistant roller bearing being positioned on the stages of the main shaft; a direct drive torque motor mounted on the main shaft and positioned against one side of the main bearing of the bearing assembly, a cooling assembly being disposed in the direct drive torque motor; a body including a shell member and a rear cover, one end of the body being fixed with the positioning portion of the brake assembly, the body and the main shaft being positioned by the bearing assembly, the rear cover of the body being positioned on the assistant roller bearing of the bearing assembly, the shell member serving to fix the direct drive torque motor; a position-sensing assembly disposed in the body for sensing the rotation change of the main shaft; and an adjustment nut screwed on the external thread portion of the main shaft for driving the assistant roller bearing of the bearing assembly to press tightly against the assistant roller bearing of the bearing assembly.