Patent ID: 8702065

Claim:
A quick tightener, comprising a support ( 1 ), a handle ( 4 ), a ratchet wheel ( 3 ) and a half-moon shaft ( 2 ), the handle ( 4 ) is hinged to the support ( 1 ) via the half-moon shaft ( 2 ), the ratchet wheel ( 3 ) is connected with the half-moon shaft ( 2 ) and the ratchet wheel ( 3 ) is rotatable driven by the handle ( 4 ), the half-moon shaft ( 2 ) is composed of a first half-moon shaft ( 2 b ) and a second half moon shaft ( 2 a ), in which both the first half-moon shaft ( 2 b ) and the second half-moon shaft ( 2 a ) are connected with the ratchet wheel ( 3 ) of the tightener and a spacing is provided there between to connect a binding belt, characterized in that, said first half-moon shaft ( 2 b ) is fixedly connected with the ratchet wheel ( 3 ), said second half-moon shaft ( 2 a ) is fixedly connected with the ratchet wheel ( 3 ) in a circumferential direction, said second half-moon shaft ( 2 a ) is moveable axially relative to the ratchet wheel ( 3 ), and a clutch device is located between said first half-moon shaft ( 2 b ) and second half-moon shaft ( 2 a ) to connect the second half-moon shaft ( 2 a ) to the first half-moon shaft ( 2 b ) or disengage the second half-moon shaft ( 2 a ) from the first half-moon shaft ( 2 b ); wherein the clutch device has a crown bar ( 5 ) located on the first half-moon shaft ( 2 b ) and a positioning hole ( 2 a 1 ) on the second half-moon shaft ( 2 a ), a first spring ( 6 ) is provided at the crown bar ( 5 ), and the crown bar ( 5 ) is embedded into the positioning hole ( 2 a 1 ) with an elastic force of the first spring ( 6 ); and wherein a clutch lever ( 9 ) is provided at the positioning hole ( 2 a 1 ) of the second half-moon shaft ( 2 a ), a second spring ( 10 ) is provided at the clutch lever ( 9 ) which makes the clutch lever ( 9 ) tend to be drawn into the positioning hole ( 2 a 1 ), and the crown bar ( 5 ) is pressed against an end of the clutch lever ( 9 ) with an action of the first spring ( 6 ); and wherein the first half-moon shaft ( 2 b ) is fixedly connected with a hollow crown bar seat ( 7 ), one end of the crown bar seat ( 7 ) is coupled to one side of the first half-moon shaft ( 2 b ), the other end of the crown bar seat ( 7 ) extends out of the other side of the first half-moon shaft ( 2 b ) and is fixedly connected with a press cap ( 8 ), the crown bar ( 5 ) and the first spring ( 6 ) is placed within the crown bar seat ( 7 ), both ends of the spring ( 6 ) are pressed against the crown bar seat ( 7 ) and the crown bar ( 5 ), respectively, and the crown bar ( 5 ) partially extends out of the press cap ( 8 ) with the elastic force of the first spring ( 6 ).