Patent ID: 6327799
Filing Date: 2001-12-11
Classification: E01H,F16F

Abstract:
A snow-removing machine comprising a machine body having a snow-removing section mounted at a front portion thereof, a steering handlebar mounted at a rear portion thereof and a power unit mounted at an intermediate portion thereof; said power unit including a wheel driving shaft, a drive section having driven wheels driven by said wheel driving shaft of said power unit, said drive section being turnable relative to said machine body about said wheel driving shaft, and an expandable and contractible regulating mechanism coupled between said machine body and said drive section for regulating the level of said snow-removing section relative to said drive section, said expandable and contractible regulating mechanism comprising a cylinder connected to one of said machine body and said drive section, a piston slidably received in said cylinder for dividing the inside of said cylinder into a first chamber and a second chamber, a piston rod coupled to said piston, passing through said second chamber and connected to the other of said machine body and said drive section, a communication passage for permitting the communication between said first and second chambers, and an on-off valve for opening and closing said communication passage, wherein a first end face of said piston facing said first chamber is wider than a second end face of said piston facing said second chamber, and wherein a high-pressure gas is filled in said first and second chambers, such that the high-pressure gas flows through said communication passage upon opening of said on-off valve to enable the expansion and contraction of said cylinder and said piston rod relative to each other, and the flowing of the high-pressure gas through said communication passage is inhibited upon closing of said on-off valve, whereby the expansion and compression of the high-pressure gas in said first and second chambers is permitted.