| 摘要 |
A cam and follower construction in which a flat plate has a plurality of cam grooves intersecting each other and in which the cam followers are in the form of cylindrical pins or rollers, one in each cam groove. To insure that each follower stays in its own groove and does not accidentally pass into the wrong groove at the point where they intersect, the grooves are made of different widths and different depth, the widest groove having the shallowest depth and the narrower groove having a greater depth. Thus the follower of a wide cam groove cannot pass into an intersecting narrower groove because the groove is too narrow to receive the follower, and the follower of the narrower groove cannot pass into the wider groove at the intersection, because the narrower groove is deeper and the shallower wide groove cannot accommodate it. In a modification of the construction, all of the cam grooves may have the same width near the surface of the cam plate, cooperating with follower pins or rollers of the same diameter, one groove being of a certain depth, the other grooves having a main part of lesser depth but a supplementary deeper groove receiving a guide pin extension on the follower, which serves to prevent the follower from accidently entering the wrong cam groove where the grooves intersect. |
