Self adjusting automatic load brake
AssigneeGoodrich Corporation
InventorsBejan Maghsoodi, Zachary Limas
Life of this patent
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Abstract
A self-adjusting automatic load brake for a hoist is disclosed. In various embodiments, the load brake includes a first shaft defining an annular hollow portion; a second shaft defining an engagement portion, the engagement portion configured for sliding disposition within the annular hollow portion; a first reaction plate coupled to the first shaft; a second reaction plate coupled to the second shaft; and a plurality of friction discs, with at least one of the plurality of friction discs coupled to a cup and disposed between the first reaction plate and the second reaction plate, the annular hollow portion of the first shaft and the engagement portion of the second shaft being sized and configured to accommodate thinning of the plurality of friction discs.
Claims20
A self-adjusting automatic load brake for a hoist, comprising:
- a first shaft defining an annular hollow portion, the annular hollow portion extending an axial distance into an interior portion of the first shaft;
- a second shaft defining an engagement portion, the engagement portion configured for sliding disposition within the annular hollow portion;
- a first reaction plate coupled to the first shaft;
- a second reaction plate coupled to the second shaft;
- and
- a plurality of friction discs, with at least one of the plurality of friction discs coupled to a cup and disposed between the first reaction plate and the second reaction plate,
- wherein the annular hollow portion of the first shaft and the engagement portion of the second shaft are sized and configured to accommodate thinning of the plurality of friction discs.
A drive train for a hoist having a self-adjusting automatic load brake, comprising:
- a housing;
- an output shaft rotatably disposed within the housing and configured to rotate a cable drum, the output shaft defining an annular hollow portion, the annular hollow portion extending an axial distance into an interior portion of the output shaft, and configured to translate axially along a longitudinal axis;
- a driving shaft rotatably disposed within the housing and defining an engagement portion configured for sliding disposition within the annular hollow portion;
- a cup rotatably disposed within the housing;
- a first reaction plate connected to the output shaft;
- a second reaction plate connected to the driving shaft;
- and
- a friction disc connected to the cup and disposed between the first reaction plate and the second reaction plate.
A method of braking a hoist having a self-adjusting automatic load brake, comprising:
- operating the hoist having a first shaft defining an annular hollow portion in axial alignment with a second shaft defining an engagement portion, the engagement portion configured for sliding disposition within the annular hollow portion, the annular hollow portion extending an axial distance into an interior portion of the first shaft;
- and
- urging the first shaft toward the second shaft, such that the engagement portion is slid within the annular hollow portion upon thinning of a plurality of friction discs, with at least one of the plurality of friction discs coupled to a cup and disposed between a first reaction plate coupled to the first shaft and a second reaction plate coupled to the second shaft, wherein the annular hollow portion of the first shaft and the engagement portion of the second shaft are sized and configured to accommodate thinning of the plurality of friction discs.
Dependencies are inferred from the claim text.