| 摘要 |
A chain saw comprising first and second assemblies. The first assembly generates mechanical vibrations and may include an internal combustion engine, a cutting chain with a guide bar and a drive system. The second assembly comprises an inertia mass and may include a fuel tank and a carburetor. Vibration isolation means connect the two assemblies and a handle network may be provided to define a cage-like structure connected with the second assembly. The first assembly is resiliently supported within the cage-like network by the vibration isolation means and bumper devices are associated therewith to preclude the failure of the resilient vibration isolation means due to unusual shearing influences being applied thereto. The axis of rotation of a crank shaft within the engine and the cutting plane of the overall saw are arranged to direct a substantial portion of the total vibrational energy along a primary plane of vibration. The vibration isolation means and the bumper devices are generally aligned with, and cooperate to absorb shock energy directed along, this primary plane. The vibration isolation means may be arranged to absorb vibration in shear and the bumper devices may be arranged to absorb energy generally in compression.
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