Device for adjusting the relative position of two parts

A device for adjusting the relative position of two parts comprising:

• two parts (1, 8) in the form of plates;
• an adjustment pin (3) rotatably supported by a first (1) of said two parts, including an eccentric cam pin portion (4) immediately adjacent said first part (1);
• a toothed wheel (5) with toothing (6) formed around the toothed wheel perimeter, said toothed wheel mounted on said eccentric cam pin portion for rotation immediately adjacent said first part;
• said other (8) of said two parts having a substantial annular portion disposed adjacent said first part and surrounding said toothed wheel, said other part (8) including toothing (7) formed as an internal ring gear within said substantial annular portion and engaging said toothed wheel toothing (6) so as to be rotatably driven by said toothed wheel;
• the number of teeth on said toothed wheel toothing (6) and on said toothing (7) differing by at least one;
• a third part (18) in the form of a plate disposed immediately adjacent said toothed wheel and said other part to laterally enclose said toothed wheel and said substantial annular portion between said third part and said first part;
• mutual coupling means between said two parts, said third part and said toothed wheel, including a plurality of bores (13) in said toothed wheel and a corresponding plurality of pegs (14, 15, 16) of lesser diameter than said bores, said pegs extending from said first and third parts through respective bores in said toothed wheel;
• said mutual coupling means enabling concentric rotation of said other part (8) about said adjustment pin (3) in response to eccentric rotation of said toothed wheel;
• and
• means for rigidly securing a portion of said plurality of pegs to said first and third parts to rigidly fix said first and third parts together and maintain said toothed wheel and said other part laterally enclosed between said first and third parts, and thereby substantially restrict any movement of said toothed wheel and said other part along the axis of said adjustment pin during rotation thereof.