Gear is a kind of wheel like mechanical parts that rely on the meshing of teeth to transmit torque. Through transmission with other toothed mechanical parts (such as another gear, rack, worm), gears can realize the functions of changing speed and torque, changing direction and form of movement. Due to the advantages of high transmission efficiency, accurate transmission ratio and large power range, gear structure is widely used in industrial products. The gear teeth are buckled with each other, and one gear will drive the other gear to rotate to drive power. To separate the two gears, chains, tracks and belts can also be used to drive the gears on both sides to transmit power.
The tooth eating profile of the rack is a straight line rather than an involute, which is equivalent to a cylindrical gear with an infinite radius of the dividing circle. The rack can be divided into spur gear rack and helical gear rack, which are matched with spur gear and helical gear respectively.
In the application of laser cutting machine, the rack and cylindrical gear are usually used for servo motor to transmit power, so that the laser cutting head can move in the X, y, z directions to achieve the purpose of cutting workpieces of various shapes.
The helical rack and gear have better meshing degree, stable transmission and low noise; The large coincidence degree reduces the load of each pair of gears and improves the bearing capacity of gears, so it is widely used in the manufacture of laser cutting machines.
Precautions for gear use:
1. Confirm whether the gear is installed in place before starting
2. The contact of the gear cannot be biased to one end
3. Avoid using without side clearance
4. Proper lubrication
5. If the gear is exposed, please be sure to install a protective cover to ensure safety
6. Do not touch the gear when it is rotating
7. In case of abnormal noise and vibration during operation, please stop the machine to confirm the gear engagement and assembly