A motor, comprising: a rotation shaft comprising a first end portion, a second end portion, and a middle portion connecting the first end portion to the second end portion; a rotor assembly configured to drive an external member to rotate, a stator assembly and a stator bearing comprises a second bearing and a third bearing , wherein a stator , being part of said stator assembly , is positioned inside of the rotor and surrounds the rotation shaft , wherein the stator is located between the second bearing and the third bearing , such that the second bearing and the third bearing are disposed on two ends of the stator , and wherein the stator bearing and the rotor assembly are disposed on the middle portion of the rotation shaft , characterized in that the motor further comprising: a first bearing ; a base connected to the first end portion by the first bearing ; wherein the rotor assembly comprises a rotor and said external member, like a second support arm of a gimbal, wherein said first bearing is connected to the first end portion of the rotation shaft and the base , wherein the stator bearing , the rotor assembly and the first bearing are sequentially arranged along in axial direction of the rotation shaft , wherein the stator assembly being connected to the rotation shaft by said stator bearing , wherein the rotor is fixedly connected to the rotation shaft at a position between said first bearing and said second bearing , and wherein the stator assembly comprises a stator and an end cap . a rotation shaft comprising a first end portion, a second end portion, and a middle portion connecting the first end portion to the second end portion; a rotor assembly configured to drive an external member to rotate, a stator assembly and a stator bearing comprises a second bearing and a third bearing , wherein a stator , being part of said stator assembly , is positioned inside of the rotor and surrounds the rotation shaft , wherein the stator is located between the second bearing and the third bearing , such that the second bearing and the third bearing are disposed on two ends of the stator , and wherein the stator bearing and the rotor assembly are disposed on the middle portion of the rotation shaft , characterized in that the motor further comprising: a first bearing ; a base connected to the first end portion by the first bearing ; wherein the rotor assembly comprises a rotor and said external member, like a second support arm of a gimbal, wherein said first bearing is connected to the first end portion of the rotation shaft and the base , wherein the stator bearing , the rotor assembly and the first bearing are sequentially arranged along in axial direction of the rotation shaft , wherein the stator assembly being connected to the rotation shaft by said stator bearing , wherein the rotor is fixedly connected to the rotation shaft at a position between said first bearing and said second bearing , and wherein the stator assembly comprises a stator and an end cap . a first bearing ; a base connected to the first end portion by the first bearing ; wherein the rotor assembly comprises a rotor and said external member, like a second support arm of a gimbal, wherein said first bearing is connected to the first end portion of the rotation shaft and the base , wherein the stator bearing , the rotor assembly and the first bearing are sequentially arranged along in axial direction of the rotation shaft , wherein the stator assembly being connected to the rotation shaft by said stator bearing , wherein the rotor is fixedly connected to the rotation shaft at a position between said first bearing and said second bearing , and wherein the stator assembly comprises a stator and an end cap . <EOS>