| 摘要 |
A tumbling unit (1) such as a casting shake-out unit, rotary media drum, sand reclaimer or the like, is provided. The tumbling unit includes a cylindrical outer shell (3) and a cylindrical inner shell (5). The inner liner is formed of a series of interfitting segments (9). The segments (9) each have an inner surface (13), an outer surface (15), side edges (17), and front edge, and back edges (19), and rifling (21) extending from the outer surface (15). The side edges (17) of the segments have a groove (23) formed therein which extends the length of the said edges. The grooves (23) of neighbouring segments (9) define a channel between the segments (9). A pin (25) is received in the channel (23) to urge the neighbouring segments (9) apart to form a tight interfit among the segments in a row of the liner. The retaining pin (25) has a body (41) having side surfaces (43), a top surface (45), and a bottom surface (49). A rib (51) extends along each side surface (43) which is shaped and sized to be received in the grooves (23) of the neighbouring segments (9). An arm extends upwardly from the pin body top surface. The pin arm (53) conforms in shape and size to the side profile of the rifling (21), and is positioned on the pin body to be in alignment with the rifling of the adjacent segments, to form a continuous rifling on said liner. <IMAGE> |
