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A guide bar mounting arrangement for a tree harvester. The tail end of the guide bar is provided with a center slot and pin receiving slot at each side thereof. A sliding block has a center boss and pins permanently or removably mounted therein at the sides of the boss and the combination is slidabl

A guide bar mounting arrangement for a tree harvester. The tail end of the guide bar is provided with a center slot and pin receiving slot at each side thereof. A sliding block has a center boss and pins permanently or removably mounted therein at the sides of the boss and the combination is slidably mounted in a fixture or base member fixedly secured to the harvester adjacent a drive sprocket. The guide bar is fitted to the sliding block center slot receiving a center boss of the sliding block and the pin receiving slots engaging the pins of the sliding block. A saw chain is entrained around the guide bar and drive sprocket and the sliding block moved relative to the sprocket to tension the saw chain. The sliding block is forced against the base member to clamp the bar in position.

대표청구항 ▼

[ I claim:] [1.] A tree harvester comprising:a tree harvester boom and a chain saw mounted on the distal end of the boom;said chain saw including a power head having a drive sprocket, an elongated guide bar having a nose end and a tail end, the tail end mounted adjacent to the drive sprocket, and a

[ I claim:] [1.] A tree harvester comprising:a tree harvester boom and a chain saw mounted on the distal end of the boom;said chain saw including a power head having a drive sprocket, an elongated guide bar having a nose end and a tail end, the tail end mounted adjacent to the drive sprocket, and a saw chain loop surrounding the drive sprocket and guide bar; anda mounting apparatus mounting the bar to the harvester, said mounting apparatus including a base member and a sliding block slidably mounted to the base member, a power source slidably positioning the block relative to the base member and a clamp member selectively clamping the sliding block in a fixed position relative to the base member, said mounting apparatus including said sliding block having a boss and at least one pin at one side of the boss, said bar having a center slot open to the tail end for slidably receiving the boss and a pin receiving slot adjacent the tail end and open to the tail end for receiving said pin, said bar as mounted to the block being slidably movable with said block whereby positioning of the block thereby positions the bar relative to the sprocket for tensioning the saw chain, said pin and boss as positioned in said center slot and pin receiving slot cooperatively resisting a bar splitting force applied during cutting with the chain saw.