Problem to be solved: to avoid the deformation of the snow removal auger and the breakage of the transmission gear by increasing the driving load of the snow removal auger by the compact torque limiter mechanism.Solution: the drive rotating portion 21 is formed on the auger drive shaft 16 so as to be relatively rotationally rotatable, and the relayed rotation portion 22 is formed so as to be capable of being relatively rotatable and slidable on the auger drive shaft 16, and the passive rotation portion 23 is formed in the auger supporting shaft 13A so as to be relatively rotationally rotatable.The plate spring 24 presses the relay rotating portion 22 against the drive rotating portion 21, and the power of the driving rotary portion 21 is transmitted to the relay rotation section 22 by friction between the drive rotating portion 21 and the relay rotation section 22 until the driving load of the snow removing auger 13 increases to the first set value.A clampin 25 is provided for interlocking the relay rotating portion 22 with the passive rotation portion 23 until the driving load of the snow removing auger 13 increases to a second set value larger than the first set value.Diagram
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