A sander with automatic heat dissipation

Abstract

The invention discloses an automatic-cooling sander which comprises an abrasive disc and a rotating shaft connected with the abrasive disc. A water incoming passage is formed in the rotating shaft, a fixing block is arranged peripherally on the outer wall of the rotating shaft, the lower side face of the fixing block is slidably connected with a retaining block, a number one spring is arranged between the retaining block and the outer wall of the rotating shaft, a water storage cavity is formed in the fixing block and communicated with the water incoming passage, a water outgoing groove is formed in the lower side face of the fixing block and communicated with the water storage cavity, a slider is slidably connected in the water outgoing groove, a water draining passage is formed in the slider, one end of the water draining passage leads to the upper side face of the slider while the other end of the same leads to the right side face of the slider, an automatic water adding device is arranged on the side face of the rotating shaft, and a water outgoing quantity control device is arranged in the automatic water adding device. When in use, the automatic-cooling sander automatically cools the abrasive disc, so that service life of the abrasive disc is prolonged, and a ground damage is protected from damage caused by overhigh temperature of the abrasive disc.

Description

technical field [0001] The invention relates to a sander with automatic heat dissipation. Background technique [0002] A sander is a manual electric tool for grinding the surface of an object. It uses various driving mechanisms to make the grinding disc rotate continuously and rapidly, thereby grinding the surface of the object. It is precisely because of the continuous and rapid rotation of the grinding disc that it will generate a lot of heat after rubbing against the surface of the object, making the grinding disc hot. On the one hand, the hot grinding disc will affect the life of the grinding disc after working for a long time. On the other hand, its friction temperature Too high will cause damage to the surface of the object being polished and cause unnecessary losses. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the present invention provides a sander with automatic heat dissipation, which automatically dissipates heat to the grin...

AI Technical Summary

Problems solved by technology

It is precisely because of the continuous and rapid rotation of the grinding disc that it will generate a lot of heat after rubbing against the surface of the object, making the grinding disc hot. On the one hand, the hot grinding disc will affect the life of the grinding disc, on the other hand, its friction temperature Too high will cause damage to the surface of the object being polished, causing unnecessary losses

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