Rack connection structure

The utility model discloses a rack connection structure, the rack comprises at least two the same branch rack end -to -end connection, every both ends of dividing the rack is equallyd divide and do not is equipped with tenon and mortise, is connected with the cooperation of mortise through the tenon between the adjacent minute rack, the rack is annular, shape intercepting in the process of dividing the rack one section circular arc behind the branches such as circle that the rack formed. The utility model provides a rack connection structure has changed integrated into one piece structure setting in the past, and rack itself adopts tenon fourth of the twelve earthly branches structural connection, condition emergence that effective screen slot degree of consistency of having avoided causing because of expend with heat and contract with cold changes. 本实用新型公开了种齿条连接结构，所述齿条由至少两个相同的分齿条首尾连接组成；每个分齿条的两端均分别设有榫头和卯眼，相邻分齿条之间通过榫头与卯眼的配合连接；所述齿条为环形，分齿条的形状截取于经过所述齿条所形成的圆等分后的段圆弧。本实用新型提供了种齿条连接结构，改变了以往的体成型结构设置，齿条本身采用榫卯结构连接，有效了避免了