Patent ID: 8042657

Claim:
A one-way load self-control spiral type brake, comprising: a reel ( 10 ), two bearing frames ( 3 ) equipped in the reel ( 10 ), a brake shaft ( 2 ) set between the two bearing frames ( 3 ), two ends of the brake shaft ( 2 ) connecting a transmission shaft ( 1 ), a front end of said brake shaft ( 2 ) being equipped with a fixing apparatus ( 7 ), wherein, behind the fixing apparatus ( 7 ), a first inner friction piece ( 8 ), a first external friction piece ( 9 ), a second inner friction piece ( 8 ), a second external friction piece ( 9 ), an internal screw thread pressure plate ( 12 ), a tension spring ( 13 ), a connection piece ( 14 ) and a brake shaft coupling ( 16 ) are provided in sequential order around the brake shaft ( 2 ), and are fixed together by a socket and spigot joint, wherein the inner friction piece ( 9 ) and the brake shaft ( 2 ) mesh with each other, and an external tooth ( 17 ) is set on an outer circle of the external friction piece ( 9 ), a front end of the brake shaft coupling ( 16 ) is fixed on an outside of an internal screw thread pressure plate ( 12 ), and in the reel ( 10 ), an inner tooth ( 18 ) meshes with an external tooth ( 17 ) on an outer circle of the external friction piece ( 9 ).