Hydropneumatic gun for setting blind-rivet nuts

Details Hydropneumatic gun for setting blind-rivet nuts Hydropneumatic gun for setting blind-rivet nuts

B - Operations, Transporting

21

J

218/2

B21J 15/10 (2006.01) B21J 15/18 (2006.01)

Patent

CA 1300564

-30- Abstract The present invention relates to improvements in a hydropneumatic gun for setting blind-rivet nuts used for integrally securing, for example, two panels to each other with a nut. In the hydropneumatic gun for setting blind-rivet nuts, an air piston fitted in an air cylin- der is moved to pressurize oil housed in the gun body, causing an oil piston to be retracted, so that a screw mandrel attached to the oil piston at its tip is re- tracted to the inner part of the gun body, thereby to exert a deforming force to a sleeve of a nut threadedly mounted on the screw mandrel. The hydropneumatic gun for setting blind rivet nuts comprises an air motor to be rotated by compressed air, an air motor driving air guide passage, an air motor forward/reverse rotation direction changeover mechanism for switching the rota- tion direction of the air motor, and a power transmis- sion mechanism for transmitting an air motor driving force to the screw mandrel. According to the present invention, a series of operations of the screw mandrel such as forward rotation, stop of the rotation, retrac- tion, reverse rotation and advancement can be carried out smoothly and sequentially.

557485

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