Abstract: A gearbox for a gear motor assembly has a housing defining a chamber and an opening in communication with the chamber. A stationary shaft has one end mounted to a bottom of the chamber and the other end extends toward the opening. A worm wheel is rotatably mounted on the stationary shaft and disposed in the chamber. An output gear connected to the worm wheel protrudes out of the chamber. A cover seals the opening of the chamber. The cover has an annular cover plate with an inner bore and an inner flange extending from an edge of the inner bore towards the bottom of the chamber. The worm wheel has a cylindrical boss that is supported by the inner flange against lateral movement.

Abstract: A gear motor assembly includes a motor and a gearbox connected together. The motor includes a stator and a rotor. The stator has a housing, magnets attached to the housing, and brushes. The rotor includes a shaft with a rotor core, a commutator, a sleeve, a bushing and a worm mounted thereon. The bushing is slidably located between the commutator and worm. The sleeve is located between the commutator and the bushing. The rotor is balanced with the worm fix to the shaft. The gearbox includes a casing having an opening, and a worm gear received in the casing. The brushes of the motor are mounted in the casing. The shaft has a first end that extends into the gearbox. The bushing is fixed in the casing via a bushing seat.

Abstract: A gearbox for a gear motor assembly has a housing defining a chamber and an opening in communication with the chamber. A stationary shaft has one end mounted to a bottom of the chamber and the other end extends toward the opening. A worm wheel is rotatably mounted on the stationary shaft and disposed in the chamber. An output gear connected to the worm wheel protrudes out of the chamber. A cover seals the opening of the chamber. The cover has an annular cover plate with an inner bore and an inner flange extending from an edge of the inner bore towards the bottom of the chamber. The worm wheel has a cylindrical boss that is supported by the inner flange against lateral movement.

Abstract: A gear motor assembly includes a motor and a gearbox connected together. The motor includes a stator and a rotor. The stator has a housing, magnets attached to the housing, and brushes. The rotor includes a shaft with a rotor core, a commutator, a sleeve, a bushing and a worm mounted thereon. The bushing is slidably located between the commutator and worm. The sleeve is located between the commutator and the bushing. The rotor is balanced with the worm fix to the shaft. The gearbox includes a casing having an opening, and a worm gear received in the casing. The brushes of the motor are mounted in the casing. The shaft has a first end that extends into the gearbox. The bushing is fixed in the casing via a bushing seat.

Abstract: A gear motor assembly includes a gearbox, a motor mounted to the gearbox, a first damper and a second damper. The gearbox includes a gearing casing and a worm gear installed in the gear casing. The motor includes a stator and a rotor. The stator includes a housing. The rotor includes a motor shaft and a worm integrally rotating with the shaft. The shaft extends into the gear housing and the worm is meshed with the worm gear. The first damper is sandwiched between the gear casing and a first end of the shaft, eliminating end play between the shaft and the gear casing. The second damper is sandwiched between the motor housing and a second end of the shaft, eliminating end play between the shaft and the motor housing.

Abstract: A gear motor assembly includes a gearbox and a motor mounted to the gearbox. The gearbox includes a gear casing and a worm gear installed in the gear casing. The motor includes a stator, a rotor and brush gear. The rotor includes an shaft, a rotor core and a commutator fixed to the shaft. A worm integrally rotates with the shaft and is meshed with the worm gear. The brush gear includes multiple brushes slidably contacting the commutator, and multiple springs urging the corresponding brush towards the commutator. A lengthwise axis of the brush is inclined to a rotational axis of the commutator with a first angle between 75° to 87°.

Abstract: A gear motor assembly includes a gearbox, a motor mounted to the gearbox, a first damper and a second damper. The gearbox includes a gearing casing and a worm gear installed in the gear casing. The motor includes a stator and a rotor. The stator includes a housing. The rotor includes a motor shaft and a worm integrally rotating with the shaft. The shaft extends into the gear housing and the worm is meshed with the worm gear. The first damper is sandwiched between the gear casing and a first end of the shaft, eliminating end play between the shaft and the gear casing. The second damper is sandwiched between the motor housing and a second end of the shaft, eliminating end play between the shaft and the motor housing.

Abstract: A gear motor assembly includes a gearbox and a motor mounted to the gearbox. The gearbox includes a gear casing and a worm gear installed in the gear casing. The motor includes a stator, a rotor and brush gear. The rotor includes an shaft, a rotor core and a commutator fixed to the shaft. A worm integrally rotates with the shaft and is meshed with the worm gear. The brush gear includes multiple brushes slidably contacting the commutator, and multiple springs urging the corresponding brush towards the commutator. A lengthwise axis of the brush is inclined to a rotational axis of the commutator with a first angle between 75° to 87°.