Pancake motor
AssigneesChia-Sheng Liang, Safeway Electro-Mechanical Co., Ltd.
InventorCHIA-SHENG LIANG
Life of this patent
Estimating the term…
Abstract
A gear motor for decreasing speed at a mechanical power output is provided with a housing; an electric motor including an outer stator and a rotor surrounded and driven by the outer stator; a planetary gear train including planet gear assemblies, a stationary ring gear at one end of the planet gear assemblies, and a driving ring gear at the other end of the planet gear assemblies. Each planet gear assembly includes a first gear and a second gear coaxial with and co-rotated with the first gear. The first and second gears are disposed in a carrier. The first gear meshes the stationary ring gear. The second gear meshes the driving ring gear. A driving shaft is rotatably disposed through the housing and secured to the driving ring gear as a mechanical power output.
Claims19
A gear motor comprising:
- a housing;
- an electric motor including an outer stator and a rotor surrounded and driven by the outer stator;
- a planetary gear train including a plurality of planet gear assemblies, a stationary ring gear at one end of the planet gear assemblies, and a driving ring gear at the other end of the planet gear assemblies wherein the planet gear assemblies are positioned between the stationary ring gear and the driving ring gear, each planet gear assembly includes a first gear and a second gear coaxial with and co-rotated with the first gear, the first and second gears are disposed in a carrier, the first gear meshes the stationary ring gear, and the second gear meshes the driving ring gear;
- and
- a driving shaft rotatably disposed through the housing and secured to the driving ring gear as a power output;
- wherein the rotor and the carrier are secured together to form an annular rotor having a central opening put on the driving shaft, two spaces are formed at two ends of the carrier respectively, each space being configured to receive either the stationary ring gear or the driving ring gear, the number of the teeth of the first gear is equal to that of the teeth of the second gear, the number of the teeth of the stationary ring gear is different from that of the teeth of the driving ring gear, and a difference between the number of the teeth of the stationary ring gear and that of the teeth of the driving ring gear is a multiple of the number of the planet gear assemblies.
A gear motor comprising:
- a housing having a first shell and a second shell, the second shell including a central opening and releasably secured to the first shell;
- an electric motor disposed in the housing and including an outer stator and a rotor surrounded and driven by the outer stator;
- a planetary gear train disposed in the housing and including a plurality of planet gear assemblies, a stationary ring gear at one end of the planet gear assemblies, and a driving ring gear at the other end of the planet gear assemblies wherein the planet gear assemblies are positioned between the stationary ring gear and the driving ring gear, each planet gear assembly includes a first gear and a second gear coaxial with and co-rotated with the first gear, the first and second gears are disposed in a carrier, the first gear meshes the stationary ring gear, and the second gear meshes the driving ring gear;
- a power output secured to the driving ring gear, the power output rotatably disposed through the central opening of the second shell to be exposed on the housing;
- and
- a support cylinder disposed on a center of one surface of the first shell opposing the second shell, the support cylinder extending toward the second shell;
- wherein the rotor and the carrier are secured together to form an annular rotor having a central opening put on the support cylinder, two spaces are formed at two ends of the carrier respectively, each space being configured to receive either the stationary ring gear or the driving ring gear, the number of the teeth of the first gear is equal to that of the teeth of the second gear, the number of the teeth of the stationary ring gear is different from that of the teeth of the driving ring gear, and a difference between the number of the teeth of the stationary ring gear and that of the teeth of the driving ring gear is a multiple of the number of the planet gear assemblies.
Dependencies are inferred from the claim text.