Wobble joint

An automatic washing appliance, comprising:

• a wash basket;
• a wash plate disposed within said wash basket;
• and
• a power driven wobble joint comprising an inner joint member supported against pivotal movement and having a curved sliding surface, an outer joint member having a curved sliding surface and mounting said wash plate, an intermediate joint member disposed between said inner and outer joint members and having an outer curved sliding surface supporting said curved sliding surface of said outer joint member for relative pivotal movement of said outer and intermediate joint members and an inner curved sliding surface supporting said curved sliding surface of said inner joint member for relative pivotal movement of said inner and intermediate joint members, mutually engaging motion limiting features acting between said intermediate joint member and each of said inner and outer joint members and restricting said relative pivotal movement of said outer and intermediate joint members to pivotal movement in a first plane containing said axis, and restricting said relative pivotal movement of said intermediate and inner joint members to pivotal movement within a second plane containing said axis and disposed transverse to said first plane to enable said outer joint member and thus said wash plate to gyrate with wobbling action about a fixed axis of said inner joint member, and wherein said motion limiting features include first and second arcuate grooves extending parallel to said first and second planes and retainers captured in said grooves and relatively moveable therealong.