Low backlash direct drive actuator
- Oakland, CA
A low backlash direct drive actuator is described which comprises a motor such as a stepper motor having at least 200 steps per revolution; a two part hub assembly comprising a drive hub coaxially attached to the shaft of the motor and having a plurality of drive pins; a driven hub having a plurality of bores in one end thereof in alignment with the drive pins in the drive hub and a threaded shaft coaxially mounted in an opposite end of the driven hub; and a housing having a central bore therein into which are fitted the drive hub and driven hub, the housing having a motor mount on one end thereof to which is mounted the stepper motor, and a closed end portion with a threaded opening therein coaxial with the central bore in the housing and receiving therein the threaded shaft attached to the driven hub. Limit switches mounted to the housing cooperate with an enlarged lip on the driven hub to limit the lateral travel of the driven hub in the housing, which also acts to limit the lateral travel of the threaded shaft which functions as a lead screw.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 5359246
- OSTI ID:
- 869579
- Country of Publication:
- United States
- Language:
- English
Similar Records
Transmission speed sensor arrangement
Nutating spider crank reciprocating piston machine
Related Subjects
direct
drive
actuator
described
comprises
motor
stepper
200
steps
revolution
hub
assembly
comprising
coaxially
attached
shaft
plurality
pins
driven
bores
alignment
threaded
mounted
opposite
housing
central
bore
therein
fitted
mount
closed
portion
coaxial
receiving
limit
switches
cooperate
enlarged
lip
lateral
travel
functions
lead
screw
coaxially mounted
stepper motor
assembly comprising
central bore
lead screw
coaxially attached
bore therein
direct drive
motor mount
backlash direct
drive actuator
/310/464/