Patent ID: 8511529
Filing Date: 2013-08-20
Classification: B25C,B25F

Abstract:
1. An oscillation reducing suspension device for a fan motor of a combustion-powered tool, the combustion-powered tool including a cylinder head which is disposed to cover a combustion chamber, and which has an upper major surface defining a cavity that extends along a rotary axis for accommodating the fan motor and which terminates at a floor surface that has a passage to communicate the cavity with the combustion chamber so as to permit an armature shaft of the fan motor to extend into the combustion chamber, and a fan which is received in the combustion chamber, and which is rotated with the armature shaft, said oscillation reducing suspension device comprising: a holding web member having a central region which defines a central opening to be sleeved on a barrel wall of the fan motor, and a surrounding region which is opposite to said central region in radial directions, and which is adapted to be securely mounted on the upper major surface of the cylinder head; a first retaining member adapted to be mounted on the barrel wall of the fan motor and disposed at one side of said central region in a direction of the rotary axis; a second retaining member adapted to be mounted on the barrel wall of the fan motor and disposed at the other side of said central region, opposite the one side of said central region; and a first damping member formed to be sleeved on the barrel wall of the fan motor, and disposed between said central region and said first retaining member, and a second damping member formed to be sleeved on the barrel wall of the fan motor, and disposed between said central region and said second retaining member so as to minimize impact of an axial vibration force on the fan motor.