| 摘要 |
<p>Bearing system for a turntable (10) with a stepping drive, in which a table plate (12) is rotatably mounted on ball bearings on top of a housing (14), having drive pins (36) disposed on the same diameter offset at uniform angular distances and protruding from the bottom of the table plate (12), the drive pins engage a cam groove (34) in a motor-driven roll (32) mounted on the housing, wherein the shape of the cam groove determines the characteristic of the rotary movement of the turntable (12); the table plate being circularly defined, has a diameter that is greater than the associated upper part of the housing (14) that forms the bearing area (40); the part of the table plate (12) reaching radially past the housing is thickened such that it reaches slightly downward over the bearing area (40) of the housing and the races of the rolling bearing for the table plate are formed in the bearing area of the outwardly facing wall of the housing (14). On the margin of the table plate facing downwardly in the bearing area there is removably fastened a bearing ring (50), and in the inner surface of the table plate (10) opposite the races in the housing, races for mounting the rolling bodies (bearing balls 44) are formed partly in the overreaching outer margin area of the table plate and partly in the bearing ring (50).</p> |
