Device connected to a crank for moving a part mounted on a slider relative thereto

Abstract

A device on a slider crank for generating a motion relative to the a slider (press ram 5 ) of a part (ejecting spring pin 6 ) mounted on the slider, wherein such motion is taken off a crankpin ( 1 ) upon rotation of the crankpin around a crankshaft axis and transmitted along a pushrod (connecting rod 4 ) to the part (ejector spring pin 6 ). For this purpose, revolving parts (wheel 22, 34, 38 ; disk 98, 100 , belt 102 ; disk 142, 148 , belt 150 ) transmit rotary motion on the connecting rod ( 26, 28; 144 ) (FIG. 1 ).

1 . A slider crank mechanism comprising a reciprocating slide ( 12 ,  124 ), a crank ( 14 ,  128 ), a connecting rod ( 26 ,  28 ,  144 ) connected at a first end by a crank pin ( 20 ,  138 ) to the crank and at a second end by a hinge pin ( 18 ,  146 ) to the slide such that rotation of the crank effects reciprocating movement of the slide, a driving rotating member ( 22 ,  98 ,  142 ) and a driven rotating member ( 38 ,  100 ,  148 ) respectively located on the crank pin and hinge pin at the first and second ends of the connecting rod with rotation axes thereof respectively aligned coaxially with center axes of the crank pin and hinge pin, at least one rotary motion transfer member ( 34 ,  102 ,  150 ) connecting the driving rotating member to the driven rotating member for transmitting rotary motion of the driving rotating member to the driven rotating member along the connecting rod, and a further member ( 46 ,  72 ,  158 ) carried by the slide and drivingly connected to the driven rotating member for movement relative to the slide upon rotation of the driven rotating member.  
   
   
       2 . A slider crank mechanism as set forth in  claim 1 , wherein the crank is part of a crankshaft.  
   
   
       3 . A slider crank mechanism as set forth in  claim 1 , wherein the at least one rotary motion transfer member includes an intermediate rotating member ( 34 ) rotatably mounted to the connecting rod.  
   
   
       4 . A slider crank mechanism as set forth in  claim 3 , wherein the driving rotary member, driven rotary member and intermediate rotating member are gears.  
   
   
       5 . A slider crank mechanism as set forth in  claim 1 , wherein the at least one rotary motion transfer member includes a belt.  
   
   
       6 . A slider crank mechanism as set forth in  claim 5 , wherein the driving rotary member and driven rotary member are toothed wheels, and the belt is trained around the toothed wheels.  
   
   
       7 . A slider crank mechanism as set forth in  claim 1 , wherein a cam ( 44 ,  44 ′,  152 ) is rotated by the driven rotating member, and the further member is a cam follower ( 46 ,  82 ,  158 ) engaged with the cam.  
   
   
       8 . A slider crank mechanism as set forth in  claim 7 , wherein the cam follower is mounted to the slide for back and forth motion.