CHAIN SAW

摘要

A chain saw is provided with an adjustment mechanism that adjusts the tension of a saw chain 4 attached along a guide bar 3 projecting from a main body 2. The adjustment mechanism has a rotation shaft 55 that is provided with a feed screw, a moving element 70 that is moved on the rotation shaft 55 in an axial direction along with rotation of the rotation shaft 55 and moves the guide bar 3 forward/backward with respect to the main body 2, and a transmission mechanism including an internal gear 51 provided on an inner peripheral surface of an adjustment dial 50 rotatably provided on the main body 2 and an external gear 52 disposed on an inner side of the adjustment dial 50 and engaged with the internal gear 51. When the internal gear 51 is rotated along with rotation of the adjustment dial 50, the rotation shaft 55 is rotated via the external gear 52.

主权项

1. A chain saw comprising an adjustment mechanism that adjusts tension of a saw chain attached along a guide bar projecting from a main body,
wherein the adjustment mechanism includes: a moving element that moves the guide bar forward/backward with respect to the main body; and a transmission mechanism including a first gear that is provided on an inner peripheral surface of a first rotation member rotatably provided on the main body and a second gear that is disposed on an inner side of the first rotation member and is engaged with the first gear, and when the first gear is rotated along with rotation of the first rotation member, the moving element is moved via the second gear.