Problems to be solved: Providing a structure for connection and separation between an engine and a main unit, adapted to release coupling by separating a centrifugal clutch. Means for solving the problems: A structure for connection and separation includes an engine side adapter (1) with a clutch shoe (11), an engine side annular surface (121), and an engine side projection (13) and a main unit side adapter (2) with a clutch drum (21), a main unit side annular surface (221), and a main unit side projection (23), wherein the engine side projection (13) projects in a radial direction from a circle centered on the power transmission shaft as a center, and the main unit side projection (23) projects in a direction radially opposite to the direction in which the engine side projection (13) projects and when the engine side adapter (1) or the main unit side adapter (2) is relatively rotated about the axis of the power transmission shaft with the engine side annular surface (121) and the main unit side annular surface (221) brought into contact with each other, the engine side projection (13) and the main unit side projection (23) are moved to a back side of each other from the circumferential direction to be engaged in the axial direction of the power transmission shaft.本發明要提供一種引擎與工作主機的連接分離構造,將離心離合器分離而解除連結。引擎與工作主機的連接分離構造,是由:引擎側轉接器(1)、與工作主機側轉接器(2)所構成;引擎側轉接器(1)是具備有:離合器片(11)、引擎側環狀面(121)、及引擎側突起(13);工作主機側轉接器(2)是具備有:離合器鼓(21)、工作主機側環狀面(221)、及工作主機側突起(23);引擎側突起(13),從以動力傳達軸的軸線為中心的圓周上朝半徑方向伸出,工作主機側突起(23)是朝半徑方向上之與上述引擎側突起(13)相反的方向伸出,當使引擎側環狀面(121)及工作主機側環狀面(221)面接觸而以動力傳達軸的軸線為中心而使引擎側轉接器(1)或工作主機側轉接器(2)相對旋轉時,使引擎側突起(13)及工作主機側突起(23)從周方向朝互相的背面側移動,卡合於上述動力傳達軸的軸線方向。1...引擎側轉接器2...工作主機側轉接器3...引擎4...操作桿12...引擎側殼體13...引擎側突起15...連接凹部16...引擎側滑塊21...離合器鼓22...工作主機側殼體121...引擎側環狀面122...引擎側軌道123...端子溝125...缺口126...端子導引通路127...滑塊導引通路131...漸變化內周161...滑塊突起171...端子突起
