Structure and classification of chain saw guide bar

　　Structure and classification of chain saw guide bar

　　The guide bar is a very important part of the chain saw. In order to extend the service life of the chain saw, the chain saw guide bar should be maintained after the work is completed. The normal use and maintenance of the chain saw guide bar should ensure sufficient chain oil during the work, so that the chain saw is underneath. It can continue to maintain good working conditions during the next work. The structure, shape and size of the guide bar not only affect the friction loss between the saw chain and the guide bar, but also have a direct impact on the power consumption of sawing wood and the quality of sawing.

　　Cantilever guides are divided into guides with guide wheels and alloy toe cap guides without guide wheels and guides with guide wheels with buffering devices according to whether there are guide wheels and buffer devices at the cantilever end.

　　The guide bar with guide wheels can reduce the movement resistance of the saw chain around the end of the guide bar. The saw chain runs smoothly, but the structure is complex; the integral guide bar without guide wheels has a simple structure, but its end is more with a guide wheel The guide bar is large, which is mainly to reduce the frictional resistance there, which is conducive to the smooth winding of the saw chain). At the same time, in order to enhance the wear resistance and heat resistance of the end of the guide bar, the end of the guide bar without a guide wheel is usually covered with an alloy with better heat and wear resistance. In order to reduce the impact and vibration of the saw chain and other parts of the sawing mechanism during the sawing process, some guides are equipped with buffers at the ends, and the guides of chainsaws have a complex structure and poor rigidity.

　　In order to reduce the weight of the guide bar, the guide bar of the chain saw is made into a hollow shape. Because there are cavities on the guide bar body, when it is used for branching and clearing of small shrubs around the stump, the operation is often affected by the insertion of small branches or small shrubs into the holes of the guide bar body.

　　In order to prolong the service life of the guide bar and reduce wear, the modern chain saw guide bar is made symmetrical. In this way, the working surface of the guide bar can be changed over and over during work to achieve uniform wear.