초록 ▼

A chain saw (1) includes a guide bar (5) supporting a chain (7) and attached to a main body (3). Disposed within the body is an anchor bolt (9) for securing the guide bar to the main body. Disposed within a sprocket cover (8) is a hexagonal nut (11) screwed onto the anchor bolt. Furthermore, provide

A chain saw (1) includes a guide bar (5) supporting a chain (7) and attached to a main body (3). Disposed within the body is an anchor bolt (9) for securing the guide bar to the main body. Disposed within a sprocket cover (8) is a hexagonal nut (11) screwed onto the anchor bolt. Furthermore, provided coaxially with the hexagonal nut is a cylindrical element (15) having a hexagonal cavity (13) that engages the hexagonal nut and is axially movable and rotatable about the same axis as the hexagonal nut. Also provided is a lever (17) disposed at the outer end of the cylindrical element. Provided within the sprocket cover are an adjustment pin (19) engaging the guide bar, a screw stock (20) onto which the adjustment pin is threaded and which extends in the axial direction of the guide bar, a first helical gear (21) disposed at one end of the screw stock, and a second helical gear (23) meshing with the first helical gear. Further provided is a rotating element (25) coaxial with the second helical gear. Rotation of the lever and thus the rotating element from the exterior of the saw causes rotation of the second helical gear.

대표청구항 ▼

1. A chain saw comprising:a main body; a chain; a guide bar for supporting the chain; an anchor bolt that has an axis and is disposed within the chain saw, the anchor bolt securing the guide bar to the main body; a hexagonal nut that threadably engages the anchor bolt; a cylindrical element provided

1. A chain saw comprising:a main body; a chain; a guide bar for supporting the chain; an anchor bolt that has an axis and is disposed within the chain saw, the anchor bolt securing the guide bar to the main body; a hexagonal nut that threadably engages the anchor bolt; a cylindrical element provided along the same axis as the hexagonal nut and adapted to be both axially movable and rotatable about the same axis as the hexagonal nut, the cylindrical element including, at one end thereof that faces the hexagonal nut, a hexagonal cavity that is adapted to engage the hexagonal nut; a lever disposed on the opposing end of the cylindrical element from the hexagonal cavity of the cylindrical element, the lever being adapted to move between a raised position and a lowered position; an adjustment pin that engages the guide bar; a screw stock that both threadably engages the adjustment pin and extends along an axis of the guide bar; a first helical gear disposed at one end of the screw stock; a second helical gear that has an axis of rotation and meshes with the first helical gear such that rotation of the second helical gear causes rotation of the first helical gear; a rotating element disposed along the same axis of rotation as that of the second helical gear, wherein rotation of the rotating element causes rotation of the second helical gear; and a sprocket cover provided on a side face of the main body, the sprocket cover defining an interior and an exterior thereof, wherein the rotating element and the lever are so arranged as to permit their operation from the exterior of the sprocket cover, and wherein pulling the lever up to the raised position and moving the lever along the axis of the anchor bolt allows the cylindrical element to engage the hexagonal nut.