Patent ID: 7294090

Claim:
A planetary gear device comprising: a housing including a chamber formed therein for receiving lubricating member therein, and including an internal gear provided therein, a carrier rotatably received in said chamber of said housing, and including an output shaft extended therefrom, and including a chamber formed therein, and including a plurality of openings formed therein and communicating with said chamber thereof, a plurality of planet pinions rotatably received in said openings of said carrier respectively, and each rotatably attached to said carrier with an axle, and said planet pinions being engaged with said internal gear of said housing, and said planet pinions each including a bore formed therein for receiving said axle, and having an inner diameter greater than an outer diameter of said axle, to form a peripheral channel between said planet pinion and said axle, and said planet pinions each including at least one side portion having at least one slot formed therein, and communicating with said bore of said planet pinion, for allowing the lubricating member to be filled into said bore of said planet pinion, and a plurality of rollers received within said peripheral channel which is formed between said planet pinion and said axle, and acted as a bearing device for allowing said planet pinions to be smoothly rotated relative to said axles respectively.