US 11,906,006 B2Granted

Self-activated no-back device

AssigneeHoneywell International Inc.

InventorsJakub Chmelar, Jiri Berjak, Ronald Vaughan, Tomas Ripel

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Abstract

A self-activated no-back device includes a housing, an input shaft, an output shaft, a reactor hub, first grooves, a brake hub, second grooves, a plurality of balls, a reactor plate, a brake pack, a reactor spring, and a load spring. The first grooves are formed on an interior side of the reactor hub interior side, and the second grooves are formed in an interior side of the brake hub. Each second groove is aligned with a different first groove to define a plurality of groove pairs. Each ball is positioned in a different one of the groove pairs. One side of the reactor plate contacts the reactor hub. The brake pack is selectively contacted by the brake hub. The reactor spring supplies a spring force to the reactor plate, and the load spring supplies a spring force to the brake pack.

Claims19

Dependent claims

A self-activated no-back device, comprising:

a housing;
an input shaft rotationally mounted on the housing and adapted to receive an input drive torque;
an output shaft rotationally mounted on the housing, the output shaft selectively engaged with the input shaft and adapted to receive output load torque;
a reactor hub surrounding a portion of the input shaft and selectively rotatable therewith, the reactor hub having a reactor hub exterior side and a reactor hub interior side;
a plurality of first grooves formed in the reactor hub interior side, each of the first grooves having at least one first cam surface;
a brake hub mounted on the output shaft and rotatable therewith, the brake hub having a brake hub exterior side and a brake hub interior side;
a plurality of second grooves formed in the brake hub interior side, each of the second grooves having at least one second cam surface, and each of the second grooves aligned with one of the plurality of first grooves to define a plurality of groove pairs;
a plurality of balls, each ball positioned in one of the plurality of groove pairs;
a reactor plate mounted within the housing and having a reactor plate interior side and a reactor plate exterior side, the reactor plate interior side contacting the reactor hub;
a brake pack mounted within the housing and selectively contacted by the brake hub exterior side;
a reactor spring mounted within the housing and supplying a first spring force to the reactor plate;
and
a load spring mounted within the housing and supplying a second spring force to the brake pack.

10 more elements

A self-activated no-back device, comprising:

a housing;
an input shaft rotationally mounted on the housing and adapted to receive an input drive torque;
an output shaft rotationally mounted on the housing, the output shaft selectively engaged with the input shaft and adapted to receive output load torque;
a reactor hub surrounding a portion of the input shaft and selectively rotatable therewith, the reactor hub having a reactor hub exterior side and a reactor hub interior side;
a plurality of first grooves formed in the reactor hub interior side, each of the first grooves having a first cam surface;
a brake hub mounted on the output shaft and rotatable therewith, the brake hub having a brake hub exterior side and a brake hub interior side;
a plurality of second grooves formed in the brake hub interior side, each of the second grooves having a second cam surface, and each of the second grooves aligned with one of the plurality of first grooves to define a plurality of groove pairs;
a plurality of balls, each ball positioned in a different one of the groove pairs;
a reactor plate mounted within the housing and having a reactor plate interior side and a reactor plate exterior side, the reactor plate interior side contacting the reactor hub;
a brake pack mounted within the housing and selectively contacted by the brake hub exterior side, the brake pack comprising a plurality of brake plates and a plurality of brake discs, each brake disc is disposed between, and contacting, a pair of the plurality of brake plates;
a reactor spring mounted within the housing and supplying a first spring force to the reactor plate that causes the reactor plate interior side to contact the reactor hub;
and
a load spring mounted within the housing and supplying a second spring force to the brake pack that causes each brake disc to contact the pair of the plurality of brake plates,
wherein the brake hub exterior side contacts the brake pack when the balls are displaced a predetermined distance along the first and second cam surfaces.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/497,396Filed 8 Oct 2021
Published: US 2023/0115546 A113 Apr 2023
Granted: 20 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

B64C 13/28
Without power amplification or where power amplification is irrelevant: mechanical
F16D 59/02
Self-acting brakes, e.g. coming into operation at a predetermined speed: spring-loaded and adapted to be released by mechanical, fluid, or…
F16D 55/04
With axially-movable discs or pads pressed against axially-located rotating members: by moving discs or pads away from one another against radial…
F16D 55/38
Brakes with a plurality of rotating discs all lying side by side: mechanically actuated