Angle grinder

Abstract

The invention relates to an angle grinder which comprises a gearbox, a rotor, a rotor front bearing, a rotor rear bearing, a bearing box, an output shaft, an output shaft bearing and a lock pin, wherein one end of the output shaft is fixedly connected with a grinding wheel piece of the angle grinder by penetrating through the bearing box, and the other end is fixedly connected with a big gear; the big gear is meshed with a small gear fixed on a rotor front end shaft; the outer side of the rotor rear bearing is connected with a wild shield and a stator; both the wild shield and the stator are sleeved on a rotor front end shaft; elastic oil seals are additionally arranged between the rotor front bearing and the rotor front end shaft and between the output shaft bearing and the output shaft respectively; O-shaped seal rings are respectively sleeved on the lock pin of the gearbox and an end cover opening of the bearing box approaching to the side of the gearbox; a bearing aluminum sleeve is sleeved on the periphery of the rotor rear bearing; and a dust preventing ring is arranged between the rotor rear bearing and a rotor rear end shaft. The invention can effectively prevent dust, dissipate heat, reinforce the seal performance of the gearbox and prolong the service life of the bearings and the durability of gears.

Description

technical field [0001] The invention relates to an electric tool, in particular to an angle grinder. Background technique [0002] The existing gear box of the angle grinder is not well sealed, and the lubricating oil used can only be solid butter, instead of liquid oil, which leads to easy invasion of external foreign matter, easy leakage of lubricating oil, low service life of bearings, and low gear life. Low durability; and when the angle grinder is in operation, the speed is very fast, the accumulated heat is very large, the heat dissipation is not very good, and in the operation process, dust easily enters the bearing through the shell, which greatly reduces the service life of the bearing . Therefore, a new technical solution needs to be provided to solve the above problems. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an angle grinder that can effectively prevent dust and dissipate heat, enhance the s...

AI Technical Summary

Problems solved by technology

[0002] The existing gear box of the angle grinder is not well sealed, and the lubricating oil used can only be solid butter, instead of liquid oil, which leads to easy invasion of external foreign matter, easy leakage of lubricating oil, low service life of bearings, and low gear life. Low durability; and when the angle grinder is in operation, the speed is very fast, the accumulated heat is very large, the heat dissipation is not very good, and in the operation process, dust easily enters the bearing through the shell, which greatly reduces the service life of the bearing

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