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AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorsKatsuyoshi Obayashi, Yoshihiro Yamasaki, Yoshiyuki Noguchi, Hidenori Arisawa, Seiji Yamashita
Estimating the term…
A planetary gear device includes: a sun gear; a plurality of planet gears that mesh with the sun gear; and a baffle unit disposed in a circumferential gap between the adjacent planet gears. The baffle unit includes: a first introduction opening portion open in a radially inward direction to introduce lubricating oil, which has lubricated the sun gear and the planet gears, into the baffle unit; an end wall forming one end in an axial direction of the first introduction opening portion; a discharge opening portion to discharge lubricating oil in the baffle unit; and a guide portion disposed at a side portion of the baffle unit on a rear side in rotation direction of the sun gear, and configured to cover the first introduction opening portion in the circumferential direction and to guide the lubricating oil to an outer circumference of the adjacent planet gears.
A planetary gear device comprising:
A planetary gear device comprising:
A planetary gear device comprising:
A planetary gear device comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Guidance of lubricant: on rotary parts, e.g. using baffles for collecting lubricant by centrifugal force
Toothed gearings for conveying rotary motion: with gears having orbital motion
Features relating to lubrication or cooling or heating: lubrication by injection; Injection nozzles or tubes therefor
Elements of gearings to be lubricated, cooled or heated: gears or bearings on planet carriers
About 7 years 11 months of term left · ends 30 Sep 2034 (estimated)
Field of the Invention
The present invention relates to planetary gear devices that are used for power transmission mechanisms for general industrial machinery, aircrafts, and the like, and that include a structure for distributing lubricating oil flow.
Description of Related Art
In any event, the present invention will become more clearly understood from the following description of preferred embodiments thereof, when taken in conjunction with the accompanying drawings. However, the embodiments and the drawings are given only for the purpose of illustration and explanation, and are not to be taken as limiting the scope of the present invention in any way whatsoever, which scope is to be determined by the appended claims. In the accompanying drawings, like reference numerals are used to denote like parts throughout the several views, and:
FIG. 1 is a front view of a planetary gear device having a structure for distributing lubricating oil flow according to a first embodiment of the present invention;
FIG. 2 is a longitudinal cross-sectional view illustrating the planetary gear device which is applied to an output device;
Hereinafter, a first embodiment of the present invention will be described with reference to FIG. 1 to FIG. 5. A planetary gear device 1 shown in FIG. 1 is mounted to a general industrial machine, an aircraft engine, or the like, and transmits power of an input shaft to an output side. Hereinafter, an input side in the axial direction of the planetary gear device 1 is referred to as a front side, and the output side opposite to the input side is referred to as a rear side.
The planetary gear device 1 includes a sun gear 2 disposed at the center portion and having external teeth 2a, a plurality of planet gears 3 disposed on an outer periphery of the sun gear 2, each having external teeth 3a, a ring gear 4 disposed on an outer periphery of a train of the planet gears, having internal teeth 4a, and baffle units 5 each disposed in a circumferential gap defined between the planet gears 3 and 3 adjacent to each other. The sun gear 2 is formed as a spur gear on the outer periphery of an input shaft 6 that is a rotary shaft. The planet gears 3 are formed as spur gears that correspond to the sun gear 2, and mesh with the sun gear 2. In the present embodiment, the three planet gears 3 are equally spaced from each other in the circumferential direction of the sun gear 2. The ring gear 4 is formed as a spur gear and meshes with the three planet gears 3.
As shown in FIG. 2, the sun gear 2, the planet gears 3, the ring gear 4, and the baffle units 5 which form the planetary gear device 1 are accommodated in a housing 9. To the housing 9, a planet gear support plate 11 is fixed. A base end portion (left side that is the input side in FIG. 2) of a hollow planet shaft 12 is attached to the planet gear support plate 11 such that the planet shaft 12 and the planet gear support plate 11 are not rotatable relative to each other. Each planet gear 3 is supported on the outer periphery of the planet shaft 12 through a slide bearing 13 such that the planet gear 3 and the planet shaft 12 are rotatable relative to each other. An end portion of the planet shaft 12 is supported by an end wall 30, which will be described below, attached to the housing 9 through the planet gear support plate 11.