Indexing gear mechanical stop

A hand-wheel actuator assembly for preventing over rotation of a provided hand-wheel shaft comprising:

• a housing defining an opening surrounding an axis for receiving the provided hand-wheel shaft;
• a drive gear for connection to, and rotation with, the provided hand-wheel shaft about the axis, wherein the drive gear is at least partially disposed in the opening and includes at least one drive gear tooth;
• and
• a stop gear coupled to the housing and including at least one stop gear tooth for engagement with the at least one drive gear tooth and preventing rotation of the drive gear over a predetermined threshold, wherein the stop gear is connected to the housing at a pivot point and is pivotable between an on center position, a full left turn position, and a full right turn position when the at least one drive gear tooth rotates into contact and pushes the at least one stop gear tooth, wherein the stop gear includes a lower surface facing the housing, wherein the lower surface defines one of a boss or a plurality of boss receiving holes and the housing includes the other one of the boss or the plurality of boss receiving holes.

A hand-wheel actuator assembly for preventing over rotation of a provided hand-wheel shaft comprising:

• a housing defining an opening surrounding an axis for receiving the provided hand-wheel shaft;
• a drive gear for connection to, and rotation with, the provided hand-wheel shaft, wherein the drive gear is at least partially disposed in the opening and includes a drive gear tooth;
• and
• a stop gear pivotably coupled at a pivot point to the housing and including three stop gear teeth separated by two stop gear tooth voids for meshed engagement with the drive gear tooth and preventing rotation of the drive gear over a predetermined threshold, wherein the housing includes a stop gear recess and the stop gear is at least partially located within the stop gear recess, wherein the stop gear recess is defined between a first abutment surface limiting the pivotal movement of the stop gear in a first direction and a second abutment surface limiting the pivotal movement of the stop gear in a second direction, wherein the stop gear defines a first side for abutment with the first abutment surface and a second side for abutment with the second abutment surface, wherein the first side and second side define a body angle, wherein the first abutment surface and the second abutment surface define a recess angle that is larger than the body angle, wherein a tooth angle is defined centrally through each of the stop gear tooth voids and the pivot point and wherein the recess angle is substantially equal to the body angle plus the tooth angle.

A hand-wheel actuator assembly comprising:

• a housing defining an opening surrounding an axis;
• a hand-wheel shaft extending along the axis between a hand-wheel and an end;
• a drive gear rotationally coupled to the hand-wheel shaft, wherein the drive gear is at least partially disposed in the opening and includes at least one drive gear tooth;
• and
• a stop gear coupled to the housing and including at least one stop gear tooth for engagement with the at least one drive gear tooth and preventing rotation of the drive gear over a predetermined threshold, wherein the drive gear includes a splined inner surface and the hand-wheel shaft includes a splined outer surface engaged with the splined inner surface, wherein the stop gear is connected to the housing at a pivot point and is pivotable between an on center position, a full left turn position, and a full right turn position, wherein the stop gear includes a lower surface facing the housing, wherein the lower surface defines a boss and the housing includes a plurality of boss receiving holes, wherein the plurality of boss receiving holes includes a first boss receiving hole that receives and retains the boss in the full right turn positon, a second boss receiving hole that receives and retains the boss in the on center positon, and a third boss receiving hole that receives and retains the boss in the full left turn positon.