초록 ▼

The invention is directed to a tensioning arrangement for adjusting the tension in the saw chain of a chain saw. The cutter bar for the saw chain has an elongated opening for engaging the guiding means upon which the cutter bar is displaceably mounted and guided in the housing of the chain saw. The

The invention is directed to a tensioning arrangement for adjusting the tension in the saw chain of a chain saw. The cutter bar for the saw chain has an elongated opening for engaging the guiding means upon which the cutter bar is displaceably mounted and guided in the housing of the chain saw. The tensioning arrangement includes a bolt-like drive member which extends through the elongated opening of the cutter bar and acts upon an output member via a transmission. The output member is configured as a slider which entrains the cutter bar for displacing the latter to tension the saw chain. The drive member extends through the elongated opening and beyond the housing as well as the cover of the sprocket wheel to the outside so that it can be adjusted conveniently and simply from outside of the housing for tensioning the saw chain.

대표청구항 ▼

An arrangement for tensioning the saw chain of a power-driven chain saw having a motor housing and a cutter bar for guiding the saw chain, the cutter bar having two flat sides, one of the flat sides facing toward the housing and the other one of the flat sides facing away from the housing, the cutte

An arrangement for tensioning the saw chain of a power-driven chain saw having a motor housing and a cutter bar for guiding the saw chain, the cutter bar having two flat sides, one of the flat sides facing toward the housing and the other one of the flat sides facing away from the housing, the cutter bar defining a longitudinal axis and having an elongated opening extending substantially in the direction of said axis, the chain saw further having a sprocket wheel for moving the saw chain about the periphery of the cutter bar and a sprocket wheel cover mounted next to said other one of the flat sides of said cutter bar facing away from the housing; the arrangement comprising: a pair of guide members extending from said housing and engaging said cutter bar in said elongated opening for mounting the same on said housing so as to permit a displacement of the cutter bar with respect thereto in the direction of said axis; said housing having a recess formed therein directly next to said one side of said cutter bar, said one side and said recess conjointly defining an enclosed compartment communicating with said elongated opening; drive means mounted in said compartment and located between the guide members so as to be conventiently accessible from said other side through said elongated opening irrespective of the presence of said sprocket wheel cover; output means mounted in said compartment and arranged adjacent said cutter bar; transmission means mounted in said compartment for connecting said drive means to said output means so as to actuate the latter in response to a movement of said drive means; and, entrainment means also mounted in said compartment for interconnecting said output means with said cutter bar for entraining and moving said cutter bar in the direction of said axis away from said sprocket wheel to increase the tension in said saw chain in response to an adjustment of said drive means.