Actuator, unclamp apparatus having actuator, and machining apparatus

Abstract

An actuator includes a power source, a cam member driven by power from the power source, a following member moving in connection with a motion of the cam member, an accommodation chamber accommodating an actuating medium, and a punch cylinder outputting the power transmitted to the actuating medium by the following member.

1 . An actuator comprising:
 a driving source;   a cam driven by power from said driving source;   a following member moving in connection with a motion of said cam;   an accommodation chamber accommodating an actuating medium; and   an output portion outputting the power transmitted to said actuating medium by said following member.   
   
   
       2 . The actuator according to  claim 1 , further comprising a connection portion connected with said accommodation chamber and said output portion. 
   
   
       3 . The actuator according to  claim 1 , wherein
 said actuating medium is a liquid actuating medium, and   the actuator further comprises a separation mechanism connected to said output portion to be able to separate gas in said actuating medium.   
   
   
       4 . The actuator according to  claim 1 , further comprising an auxiliary power source capable of applying auxiliary power to said cam member. 
   
   
       5 . The actuator according to  claim 1 , further comprising a valve supplying outside air into said accommodation chamber and ejecting gas in said accommodation chamber. 
   
   
       6 . An unclamp apparatus comprising the actuator according to  claim 1 . 
   
   
       7 . A machining apparatus comprising the actuator according to  claim 1 .