Axial Brushless DC Motor

An axial brushless DC motor comprising a stator, a rotor including a magnet, a sleeve bushing extending through the stator and including a pair of opposed distal collars, a motor shaft extends through the sleeve bushing, and a pair of opposed bearings are seated in the respective pair of collars and mount the shaft and a rotor for rotation relative to the sleeve bushing and the stator. The bearings are adapted for thrust, radial support/self-alignment, and angular adjustment of the motor shaft. In one embodiment, a stator overmold member includes a central tube that defines the sleeve bushing and includes a stator shorting ring. In one embodiment, a metal pole piece is seated in a cup-shaped magnet with a rim and the magnetic flux travels through the rim of the magnet and through a magnetic flux sensor.

Axial Brushless DC Motor

An axial brushless DC motor comprising a stator, a rotor including a magnet, a sleeve bushing extending through the stator and including a pair of opposed distal collars, a motor shaft extends through the sleeve bushing, and a pair of opposed bearings are seated in the respective pair of collars and mount the shaft and a rotor for rotation relative to the sleeve bushing and the stator. The bearings are adapted for thrust, radial support/self-alignment, and angular adjustment of the motor shaft. In one embodiment, a stator overmold member includes a central tube that defines the sleeve bushing and includes a stator shorting ring, in one embodiment, a metal pole piece is seated in a cup-shaped magnet with a rim and the magnetic flux travels through the rim of the magnet and through a magnetic flux sensor. 1. An axial brushless DC motor comprising:a stator;a rotor including a magnet;an elongate sleeve bushing extending through the stator, the sleeve bushing defining an interior through-aperture and including first and second opposed distal bearing cellars;an elongate shaft extending through the interior through-aperture of the sleeve bushing;a first bearing in the first bearing collar in the sleeve bushing and surrounding a first end of the shaft for allowing the rotation of the shaft relative to the sleeve bushing and the stator; anda second bearing in the second bearing collar in the sleeve bushing and surrounding a second opposed end of the shaft for allowing the rotation of the shaft and the rotor relative to the stator.2. The axial brushless DC motor of claim 1 , wherein the second bearing is a thrust ball bearing including balls sandwiched between opposed upper and lower bearing races claim 1 , the upper and lower bearing races including respective collars having respective ball bearing abutment surfaces that allow for the combination of thrust claim 1 , radial support/self-alignment claim 1 , and angular adjustment of the bearing races relative to each other and ...

Rotary Actuator

A rotary actuator includes a connector housing with a hollow tube, a separate motor housing clipped to one side of the connector housing, and a separate gear and sensor housing clipped to an opposed side of the connector housing. At least a first gear and a first gear carrier are located within the interior of the hollow tube. A motor shaft extends from the motor through the connector housing into the tube and into engagement with the first gear. A sensor is seated on an exterior surface of the hollow tube and a magnet is housed in the interior of the first gear carrier. The sensor is adapted to change changes in the magnetic field generated by the magnet in response to movement of the magnet. 1. A rotary actuator comprising:a connector housing including a frame;a separate motor housing secured and extending outwardly from a first side of the frame of the connector housing and defining an interior adapted to house a motor; anda separate gear and sensor housing secured and extending outwardly from a second side of the frame of the connector housing opposed to the first side of the frame of the connector housing and defining an interior adapted to house a plurality of gears, a sensor, and an output shaft.2. The rotary actuator of wherein the connector housing includes a hollow tube extending outwardly from the second side of the frame of the connector housing and into the interior of the gear and sensor housing.3. The rotary actuator of wherein the sensor is seated on the tube of the connector housing and the plurality of gears are located in the interior of the tube of the connector housing.4. The rotary actuator of further comprising first and second sets of gears mounted on first and second gear carriers respectively claim 1 , the second gear carrier also defining an interior adapted to receive a magnet.5. The rotary actuator of further comprising an internal drive arm located in the aperture defined in the second carrier.6. The rotary actuator of wherein the ...

Brake carrier having improved electromechanical actuator and mounting arrangement therefor

A brake actuator includes a carrier ( 10 ) having a centerline ( 11 ), a periphery and a radial slot ( 16 ) in the periphery, and an EMA ( 20 ), including an electric motor ( 30 ) having a longitudinal centerline ( 31 ) and a ram ( 34 ) having a longitudinal centerline ( 35 ) operatively connected to the electric motor ( 30 ), where the electric motor ( 30 ) is designed to move the ram ( 34 ) in the direction of the ram longitudinal centerline ( 35 ), the EMA ( 20 ) being mounted on the carrier ( 10 ) in the slot ( 16 ) with the ram longitudinal centerline radially ( 35 ) inward of the periphery and the motor longitudinal centerline ( 31 ) radially outward of the periphery. Also the EMA ( 20 ) used in the brake actuator.

Brake actuator

Brake control and anti-skid system

A brake and anti-skid control utilizing optical input sensors (41, 19) for determining wheel speed or position and suitable for aircraft use is disclosed. A valve control (79) has a continuous source (29) of pressurized hydraulic fluid, a hydraulically actuated wheel rotation brake device (13) which responds to applied hydraulic pressure to apply a braking force to the wheel to arrest wheel rotation, a low pressure hydraulic fluid return (33), and a flow control servo valve (17) interconnecting the source (29), the return (33), and the braking device (13) for directing fluid from the source (29) to the braking device (13) when in a first state and for directing fluid from the braking device (13) to the return (3) when in a second state. Applied hydraulic pressure is monitored and if that monitored pressure exceeds a command pressure, further fluid from the braking device (13) is diverted to the return (33).

Electric brake having parking brake function

An electromagnetic braking system includes a brake stack ( 20 ), a ram ( 18 ) shiftable in a first linear direction toward and against the brake stack ( 20 ) and in a second linear direction opposite the first linear direction, a motor ( 12 ) having an output shaft ( 14 ) mechanically connected to the ram ( 18 ) and rotatable in a first rotation direction for moving the ram ( 18 ) in the first linear direction and in a second rotation direction for moving the ram ( 18 ) in the second linear direction, at least one friction member ( 32, 34, 41, 43, 52 ) having a friction surface ( 33, 35, 43, 55 ) mounted adjacent to the motor output shaft ( 14 ), and an friction surface ( 33, 35, 43, 55 ) for moving the friction surface ( 33, 35, 43, 55 ) of the at least one friction member ( 32, 34, 41, 43, 52 ) against the motor output shaft ( 14 ) in a non-locking manner and holding the friction member ( 32, 34, 41, 43, 52 ) against the motor output shaft ( 14 ) with a predetermined force to perform a park brake function, wherein the predetermined force is low enough to allow the output shaft ( 14 ) to slip when a rotational force on the output shaft ( 14 ) exceeds a given level. Also a method for performing a park brake function.

Fault detection arrangement for vehicle brake system

A method and system is provided for determining faults in a vehicle brake system. An electronic processor obtains a brake pedal signal from a brake pedal that indicates a driver intent to brake and obtains a vehicle braking response condition signal from a brake system feedback sensor. The electronic processor determines a fault state when (1) the brake pedal signal is indicative of no brake pedal movement and the vehicle braking response signal is indicative of a vehicle braking response occurring, or when (2) the brake pedal signal is indicative of brake pedal movement and the vehicle braking response condition signal is indicative of no occurrence of a vehicle braking response. The electronic processor controls an output of an audio or visual indication of a fault state and/or controls braking operation of the vehicle in response to the fault state.

Fault detection arrangement for vehicle brake system

A method and system is provided for determining faults in a vehicle brake system. An electronic processor obtains a brake pedal signal from a brake pedal that indicates a driver intent to brake and obtains a vehicle braking response condition signal from a brake system feedback sensor. The electronic processor determines a fault state when (1) the brake pedal signal is indicative of no brake pedal movement and the vehicle braking response signal is indicative of a vehicle braking response occurring, or when (2) the brake pedal signal is indicative of brake pedal movement and the vehicle braking response condition signal is indicative of no occurrence of a vehicle braking response. The electronic processor controls an output of an audio or visual indication of a fault state and/or controls braking operation of the vehicle in response to the fault state.

Axial brushless dc motor

An axial brushless DC motor comprising a stator a rotor including a magnet, a sleeve bushing extending through the stator and including a pair of opposed distal collars, a motor shaft extends through the sleeve bushing, and a pair of opposed bearings are seated in the respective pair of collars and mount the shaft and a rotor for rotation relative to the sleeve bushing and the stator. The bearings are adapted for thrust, radial support/self-alignment, and angular adjustment of the motor shaft. In one embodiment, a stator overmold member includes a central tube that defines the sleeve bushing and includes a stator shorting ring. In one embodiment, a metal pole piece is seated in a cup-shaped magnet with a rim and the magnetic flux through the rim of the magnet and through a magnetic flux sensor.

Bremssystem mit mindestens einem Freigabesignal für Bremsregler und Verfahren zu dessen Anwendung

Electric brake having parking brake function

An electromagnetic braking system includes a brake stack (20), a ram (18) shiftable in a first linear direction toward and against the brake stack (20) and in a second linear direction opposite the first linear direction, a motor (12) having an output shaft (14) mechanically connected to the ram (18) and rotatable in a first rotation direction for moving the ram (18) in the first linear direction and in a second rotation direction for moving the ram (18) in the second linear direction, at least one friction member (32, 34, 41,43, 52) having a friction surface (33, 35, 43, 55) mounted adjacent to the motor output shaft (14), and an friction surface (33, 35, 43, 55) for moving the friction surface (33, 35, 43, 55) of the at least one friction member (32, 34, 41, 43, 52) against the motor output shaft (14) in a non-locking manner and holding the friction member (32, 34, 41, 43, 52) against the motor output shaft (14) with a predetermined force to perform a park brake function, wherein the predetermined force is low enough to allow the output shaft (14) to slip when a rotational force on the output shaft (14) exceeds a given level. Also a method for performing a park brake function.

Vehicle pedal spring resistance emulator assembly with position sensor

A vehicle pedal emulator assembly comprising a housing and a sleeve both defining an interior cavity. The sleeve is adapted for sliding movement in the interior cavity of the housing. Respective first, second, third, and fourth springs located in opposed ends of the interior cavity of the housing are compressible in parallel in response to the sliding movement of the sleeve in the interior cavity of the housing. The first and second springs surround the shaft and extend between one end of the housing and one end of the shaft. The third and fourth springs extend between one end of the sleeve and the other end of the sleeve. The combination of an inductive sensor and a Hall Effect sensor are adapted for measurement of the position of the sleeve relative to the housing.