A motor comprising: a rotary shaft; a rotor part in which the rotary shaft is disposed; a stator part disposed outside the rotor part; a housing configured to accommodate the rotor part and the stator part, and having an opening formed in one side thereof; and a motor cover disposed at the opening of the housing, wherein the motor cover comprises, a motor cover body, a first protruding part and a second protruding part which are each formed at a predetermined location and configured to protrude in a radial direction from a center of the motor cover body, the first protruding part being spaced from the center of the motor cover body, the first protruding part forming a ring shape and protrudes in the direction of the housing cavity receiving stator, rotor, said first protruding part receiving and retaining the outer race of a ball bearing, said bearing rotatably supporting the shaft, and a third protruding part formed to protrude from an edge of the motor cover body, the first protruding part, the second protruding part and the third protruding part all protruding from the motor cover body in the same direction, and a sealing part is further disposed between an end portion of the housing, which is disposed between the second protruding part and the third protruding part, and the second protruding part, wherein: the sealing part is disposed to cover the end portion of the second protruding part, and one region of the sealing part is disposed between an inner circumferential surface of the housing and an outer side surface of the second protruding part, characterized in that the second protruding part is formed so that a part of a lower portion of an outer surface thereof is bent toward the third protruding part. a rotary shaft; a rotor part in which the rotary shaft is disposed; a stator part disposed outside the rotor part; a housing configured to accommodate the rotor part and the stator part, and having an opening formed in one side thereof; and a motor cover disposed at the opening of the housing, wherein the motor cover comprises, a motor cover body, a first protruding part and a second protruding part which are each formed at a predetermined location and configured to protrude in a radial direction from a center of the motor cover body, the first protruding part being spaced from the center of the motor cover body, the first protruding part forming a ring shape and protrudes in the direction of the housing cavity receiving stator, rotor, said first protruding part receiving and retaining the outer race of a ball bearing, said bearing rotatably supporting the shaft, and a third protruding part formed to protrude from an edge of the motor cover body, the first protruding part, the second protruding part and the third protruding part all protruding from the motor cover body in the same direction, and a sealing part is further disposed between an end portion of the housing, which is disposed between the second protruding part and the third protruding part, and the second protruding part, wherein: a motor cover body, a first protruding part and a second protruding part which are each formed at a predetermined location and configured to protrude in a radial direction from a center of the motor cover body, the first protruding part being spaced from the center of the motor cover body, the first protruding part forming a ring shape and protrudes in the direction of the housing cavity receiving stator, rotor, said first protruding part receiving and retaining the outer race of a ball bearing, said bearing rotatably supporting the shaft, and a third protruding part formed to protrude from an edge of the motor cover body, the first protruding part, the second protruding part and the third protruding part all protruding from the motor cover body in the same direction, and a sealing part is further disposed between an end portion of the housing, which is disposed between the second protruding part and the third protruding part, and the second protruding part, wherein: the sealing part is disposed to cover the end portion of the second protruding part, and one region of the sealing part is disposed between an inner circumferential surface of the housing and an outer side surface of the second protruding part, characterized in that the second protruding part is formed so that a part of a lower portion of an outer surface thereof is bent toward the third protruding part.