×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Self locking in Compound spur gear train

Self locking in Compound spur gear train

Self locking in Compound spur gear train

(OP)
Hello,

I were going through Electromechanical actuator document which is driven by DC Motor with Compound spur gear train.

But the system demands self locking feature after actuator reach 90deg rotation.My Question is there any possibilities of self locking with compound spur gear train (actuator doesnt have worm gear mesh ).

Regards
John


 

RE: Self locking in Compound spur gear train

No.

There are other ways to lock an actuator, but spur gears alone won't do it.

 

Mike Halloran
Pembroke Pines, FL, USA

RE: Self locking in Compound spur gear train

thought2007,

   Be careful backdriving spur gear trains.  I have analyzed some small gearmotors and have worked out that you can accelerate the gearhead output shaft fast enough to overstress the motor shaft.  Your armature inertia may be very small, but it is multipied by the square of the gear ratio.

   Spur gears do not lock the way high ratio worm gears do.  A high ratio spur gear box may appear to be locked because the torque needed to accelerate your armature is more than you can exert by gripping the gearhead shaft with your fingers.

   Your final assembly may provide the additional leverage needed to make this physically easy.  The problem will not be obvious to whoever is installing it or playing with it.

               JHG

RE: Self locking in Compound spur gear train

(OP)
Hi Everyone,

Thanks for suggestions!!

Indeed I started working by adopting worm gears to lock

Thanks once again

John

RE: Self locking in Compound spur gear train

If the system vibrates the worm gear will not lock.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources