elevator safety gear

Elevator safety gear

safety gear of elevator is very importent for passenger elevator.basically it is a mechanism which are install or mounted at bottom of elevator cabin(some time it is install on counter weight side also whare floting pit).

some times its called emergency break.

this safety device invented by Elisha Otis how is the founder of Otis Elevator company.

basically safety gear two types of used.
1)progressive type safety gear.
2)Instantaneous type safety gear.

Structure of safety gear:

it is combination of two part.
1.Fixed part
2.Movable part or Braking part.


The safety gear sets are fixed by a connecting rod with elevator cabin, in general 02 nos safety block are placed,
movable part of safety gear are connected to governor rope,
when lift moving higher then rated speed on that time governor rope are pulled the pivot (which are connected to movable part of safety gear)
then pivot pull the movable jaw ,then safety gear are mechanically actuated.

when safety gear are inspect on that time elevator cabin are fully loaded with rated load by test weight.in general 120% of rated load.

Testing :  in this  program lift are loaded with 120% rated load then manually actuated overspeed governor. when safety gear are actuated then inspection personal are checked the marking at elevator guide rail.if it is Instantaneous type safety gear there are no option to mark sliding mark.

if safety gear are progressive then sliding mark are calculated as per manual by OEM.