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US 11,078,997 B2Granted
Motor driven electromechanical actuator
AssigneeNational Machine Group
InventorsRaymond Alvero Forrester, Jr., Robert William Hyde
Life of this patent
Estimating the term…
Abstract
A motor driven electromechanical actuator assembly includes a motor assembly having a motor shaft and a gear assembly. The gear assembly includes a plurality of gears with a belt drive that couples the motor assembly to the actuator output shaft. The actuator assembly also includes a position sensor system configured to determine a rotational characteristic of the drive shaft.
Claims20
An actuator, comprising:
- a housing defining an internal envelope and having a removable cover;
- a motor assembly provided on a surface of the internal envelope and comprising a motor and a motor shaft supported by the motor, the motor configured to supply a first torque to the motor shaft;
- a gear assembly comprising
- a drive belt coupled to receive the first torque from the motor shaft and coupled to supply a second torque to a sprocket fixed along an axis of a worm screw shaft, wherein the motor shaft and worm screw shaft extend into a first open side of the drive belt, and a second open side of the drive belt is exposed upon removal of the removable cover,
- a drive gear fixed along the axis of a drive shaft, the drive shaft having a sensor end, the drive gear being engaged along the outer surface of a worm screw portion to receive the second torque from the worm screw shaft and operable, in response thereto, to supply a drive torque to the drive shaft;
- and
- a position sensor system into which the sensor end of the drive shaft is inserted, and wherein the position sensor is configured to determine a rotational characteristic of the drive shaft, the position sensor system comprising a Hall effect sensor and a magnet.
4 more elements
An actuator, comprising:
- a housing defining an internal envelope and having a removable cover;
- a motor assembly provided on a surface of the internal envelope and comprising a motor and a motor shaft, the motor configured to supply a first torque to the motor shaft;
- a gear assembly comprising
- a drive belt coupled to receive the first torque from the motor shaft and coupled to supply a second torque to a sprocket fixed along an axis of a worm screw shaft, wherein the motor shaft and worm screw shaft extend into a first open side of the drive belt, and a second open side of the drive belt is exposed upon removal of the removable cover,
- a drive gear fixed along the axis of a drive shaft, the drive shaft having a sensor end, the drive gear coupled to receive the second torque from the worm screw shaft and operable, in response thereto, to supply a drive torque to the drive shaft;
- a position sensor system configured to receive the sensor end of the drive shaft and to determine a rotational characteristic of the drive shaft, the position sensor system comprising a Hall effect sensor and a magnet;
- and
- a temperature sensor that detects a temperature of the motor and, when the temperature of the motor exceeds a threshold temperature, a controller switches the motor into a stall condition.
5 more elements
An actuator, comprising:
- a housing defining an internal envelope and having a removable cover;
- a motor assembly provided on a surface of the internal envelope and comprising a motor and a motor shaft, the motor configured to supply a first torque to the motor shaft;
- a gear assembly comprising
- a drive belt coupled to receive the first torque from the motor shaft and coupled to supply a second torque to a sprocket fixed along an axis of a worm screw shaft, wherein the motor shaft and worm screw shaft extend into a first open side of the drive belt, and a second open side of the drive belt is exposed upon removal of the removable cover,
- a drive gear fixed along the axis of a drive shaft, the drive shaft having a sensor end, the drive gear coupled to receive the second torque from the worm screw shaft and operable, in response thereto, to supply a drive torque to the drive shaft;
- a position sensor configured to receive the sensor end of the drive shaft and to determine a rotational characteristic of the drive shaft, the position sensor comprising
- a Hall effect sensor;
- a magnet, and
- a rotational collar secured to the sensor end of the drive shaft, the rotational collar being rotatable within a receiving port disposed on the integrated chip;
- and
- a temperature sensor that detects a temperature of the motor and, when the temperature of the motor exceeds a threshold temperature, a controller switches the motor into a stall condition.
8 more elements
Dependencies are inferred from the claim text.