CRANK PRESS ACTUATOR Russian patent published in 1994 - IPC

FIELD: manufacture of press-forging machines, crank press actuators. SUBSTANCE: actuator has three-crank shaft 1 with equal eccentricity of cranks, connecting rods 2 to 4 pivotally connected with shaft cranks, slide 8 positioned in guides 7 and loaded with springs 5 and units for engagement of connecting rods 2 to 4. On side of these connecting rods slide 8 is provided with sockets 9 to 11. Central wheel of shaft 1 is located along axis of slide 8. Each of connecting rod engagement units is made in the form of plunger 12, 13, 14 and plate 21. Plungers 12, 13, 14 are pivotally connected with respective connecting rods 2, 3, 4 and provided with stop members 15, 16, 17, while plate 21 is loaded by spring 20 and provided with roller 18 adopted for engagement with master cam 19. Connecting rods, plungers with stop members are equal in size. Phase shift of extreme cranks of shaft 1 relative to middle crank is equal to 180 deg. EFFECT: simplified design of crank press actuator. 3 dwg