Backdrive assembly with a variable preload
First Claim
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1. A backdrive assembly, comprising:
- a spring body retainer having a first body portion, the spring body retainer configured for rotational movement about an axis;
a biasing member that is configured to exert a backdriving force on the spring body retainer;
a spring leg retainer rotatably mounted to the backdrive assembly and having a second body portion and a plurality of projections, the spring leg retainer applies a preload torque to the biasing member when the spring leg retainer is rotated; and
a spring locking plate operably connected to the spring leg retainer, the spring locking plate preventing rotation of the spring leg retainer in a first direction by engaging at least one of the plurality of projections of the spring leg retainer and wherein the spring locking plate allows the spring leg retainer to rotate in a second direction, the second direction being opposite to the first direction.
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Abstract
A system is disclosed herein. The system having a backdrive assembly that includes a spring body retainer having a first body portion, the spring body retainer configured for rotational movement about an axis. A biasing member is provided that is configured to exert a backdriving force on the spring body retainer. A spring leg retainer is provided having a second body portion and a plurality of projections, the spring leg retainer being configured to incrementally apply a preload torque to the biasing member. A spring locking plate is operably connected to the spring leg retainer, the spring locking plate being configured to engage at least one of the plurality of projections.
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Citations
20 Claims
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1. A backdrive assembly, comprising:
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a spring body retainer having a first body portion, the spring body retainer configured for rotational movement about an axis; a biasing member that is configured to exert a backdriving force on the spring body retainer; a spring leg retainer rotatably mounted to the backdrive assembly and having a second body portion and a plurality of projections, the spring leg retainer applies a preload torque to the biasing member when the spring leg retainer is rotated; and a spring locking plate operably connected to the spring leg retainer, the spring locking plate preventing rotation of the spring leg retainer in a first direction by engaging at least one of the plurality of projections of the spring leg retainer and wherein the spring locking plate allows the spring leg retainer to rotate in a second direction, the second direction being opposite to the first direction. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system, comprising:
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a motor drive system including a motor coupled to a shaft; and a backdrive assembly operably coupled to the motor drive system, the backdrive assembly configured for exerting a backdriving force to the shaft of the motor, wherein the backdrive assembly further comprises; a spring body retainer having a first body portion, the spring body retainer capable of rotational movement; a biasing member that is configured to exert the backdriving force on the spring body retainer; a spring leg retainer arranged opposite the spring body retainer and rotatably mounted to the backdrive assembly, the spring leg retainer having a second body portion and a plurality of projections, the spring leg retainer applies a preload torque to the biasing member when the spring leg retainer is rotated; and a spring locking plate operably connected to the spring leg retainer, the spring locking plate preventing rotation of the spring leg retainer in a first direction by engaging at least one of the plurality of projections and wherein the spring locking plate allows the spring leg retainer to rotate in a second direction, the second direction being opposite to the first direction. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of assembling a system, comprising:
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coupling a motor to a spring body retainer; coupling a biasing member to the spring body retainer; coupling a spring leg retainer to the biasing member and fixably connecting the biasing member to each of the spring body retainer and the spring leg retainer; coupling a spring locking plate to the spring leg retainer to form an assembly; inserting the assembly into a housing and preventing rotation of the spring locking plate; rotating each of the motor and the spring body retainer in a predefined rotation; preventing rotation of the spring leg retainer in a first direction; and rotating the spring leg retainer in a second direction, the second direction being opposite to the first direction, wherein rotation of the spring leg retainer in the second direction applies a preload torque to the biasing member. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification