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 (10,11) configured to drive an external member to rotate, a stator assembly (6,7) and a stator bearing (81,83) comprises a second bearing and a third bearing, wherein a stator, being part of said stator assembly (6,7), 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 (81,83) and the rotor assembly (10,11) 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 (10,11) 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 (81,83), the rotor assembly (10,11) and the first bearing are sequentially arranged along in axial direction of the rotation shaft, wherein the stator assembly (6,7) being connected to the rotation shaft by said stator bearing (81,83), 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 (6,7) 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 (10,11) configured to drive an external member to rotate, a stator assembly (6,7) and a stator bearing (81,83) comprises a second bearing and a third bearing, wherein a stator, being part of said stator assembly (6,7), 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 (81,83) and the rotor assembly (10,11) 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 (10,11) 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 (81,83), the rotor assembly (10,11) and the first bearing are sequentially arranged along in axial direction of the rotation shaft, wherein the stator assembly (6,7) being connected to the rotation shaft by said stator bearing (81,83), 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 (6,7) 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 (10,11) 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 (81,83), the rotor assembly (10,11) and the first bearing are sequentially arranged along in axial direction of the rotation shaft, wherein the stator assembly (6,7) being connected to the rotation shaft by said stator bearing (81,83), 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 (6,7) comprises a stator and an end cap.