Electric tool

Abstract

The invention provides an electric tool. The electric tool comprises a shell, a motor placed in the shell and a planet speed reducing mechanism, wherein the planet speed reducing mechanism is provided with a center wheel, a planetary wheel, a planet carrier and a gear ring; and the planet speed reducing mechanism is provided with a gearbox shell in a gapless manner so as to be directly placed in the enclosure. The electric tool can be used for remarkably reducing the radial dimension of a holding part and strengthening the holding comfort feeling of a manipulator, and better accords with man-machine engineering; the traditional gear case shell is omitted, the cost of a part is saved, the structure is simplified, the assembly is convenient, and the production efficiency is improved; and the size and weight of a complete machine are reduced, and the electric tool is more beneficial to operation and carry.

Description

technical field [0001] The invention relates to an electric tool, in particular to a speed reduction mechanism of the electric tool. Background technique [0002] In the field of electric tools, especially impact wrenches and impact drills with impact function, the gear reduction mechanism is usually housed in the gearbox, especially for the planetary reduction mechanism, there is no gear box housing. However, since the gearbox housing occupies a certain volume in the casing, especially if the gearbox casing is separated from the ring gear, the diameter of this place will become larger. For those gearbox reduction mechanisms that are just located in the fuselage When the grip part is fixed, it will inevitably increase the circumferential dimension of the grip part, which will cause discomfort to the operator during operation, which does not conform to ergonomics; moreover, if there is noise when the gear box reduction mechanism is running at high speed When it comes to impa...

AI Technical Summary

Problems solved by technology

[0002] In the field of electric tools, especially impact wrenches and impact drills with impact function, the gear reduction mechanism is usually housed in the gearbox, especially for the planetary reduction mechanism, there is no gear box housing. However, since the gearbox housing occupies a certain volume in the casing, especially if the gearbox casing is separated from the ring gear, the diameter of this place will become larger. For those gearbox reduction mechanisms that are just located in the fuselage When the grip part is fixed, it will inevitably increase the circumferential dimension of the grip part, which will cause discomfort to the operator during operation, which does not conform to ergonomics; moreover, if there is noise when the gear box reduction mechanism is running at high speed and impact sound, it is difficult to improve without changing the gear parameters and assembly method

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