Friction gear

The utility model relates to a friction type speed changer, comprising a casing, a main body, a spring, and a brake sheet component. The utility model is arranged at the back end of a worm shaft of a speed reducing machine in installation, which can prevent an internal contracting brake of an anti-d...

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Bibliographic Details
Main Authors QIUFA LI, QINGYU SU, DECAI ZHANG
Format Patent
LanguageEnglish
Published 24.10.2001
Edition7
Subjects
ELEVATORS
ESCALATORS OR MOVING WALKWAYS
HAULING
HOISTING
LIFTING
PERFORMING OPERATIONS
TRANSPORTING
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Summary:The utility model relates to a friction type speed changer, comprising a casing, a main body, a spring, and a brake sheet component. The utility model is arranged at the back end of a worm shaft of a speed reducing machine in installation, which can prevent an internal contracting brake of an anti-dropping safety device from automatically clamping and causing an elevator to stop running and causing passengers to stay in the elevator. The utility model can limit the lifting down speed of the elevator with 1.2 times of a rated speed and can reach the first floor, and has the advantages of safety, convenience for the passengers, simple operation, and no need of the operation of a professional elevator maintenance staff.
Bibliography:Application Number: CN2000265533U