power tool

Abstract

The invention provides a power tool. The power tool comprises a machine shell, a motor contained in the machine shell, a working head driven by the motor to rotate and a base plate with a through groove allowing the working head to penetrate; the base plate and the machine shell are movably connected in a matched manner to enable the working head to be capable of penetrating the through groove and extending out of the base plate; the power tool further comprises a middle part movably connected with the base plate in a matched manner, a locking mechanism is connected between the middle part and the machine shell, and the locking mechanism has a first working state and a second working state; and the middle part moves relative to the base plate to promote the locking mechanism to be switched between the first working state and the second working state, so that the power tool can be switched between a first working mode and a second working mode.

Description

technical field [0001] The invention relates to a power tool, especially a power tool with a rotating working head, especially an electric circular saw. Background technique [0002] As disclosed in CN101623834A, a traditional electric circular saw includes a casing, a motor accommodated in the casing, a circular saw blade driven by the motor to rotate, a bottom plate provided with a through groove for the circular saw blade to pass through, the bottom plate and the casing The movable joint enables the circular saw blade to extend out of the bottom plate through the through groove, and a locking mechanism is provided between the casing and the bottom plate, and the locking mechanism locks the casing and the bottom plate at a position where the circular saw blade protrudes from the bottom plate at a specific processing depth. Before working, set the processing depth and lock the casing and the bottom plate; when working, the bottom plate slides on the surface of the workpiece...

AI Technical Summary

Problems solved by technology

[0003] This kind of traditional electric circular saw has good processing visibility, but if the operator wants to start cutting from a certain position in the middle of the workpiece, he needs to align the saw blade with the processing line and press down the entire electric circular saw to achieve cutting. Since the bottom plate is not supported on the workpiece during the pressing process, the cutting accuracy depends entirely on the operator's control, and the cutting accuracy is poor

[0004] In order to facilitate the operator to start cutting from a certain position in the middle of the workpiece, a new type of electric circular saw has appeared. This electric circular saw is provided with a spring between the casing and the bottom plate, and the spring exerts force on the casing so that the saw blade Under normal conditions, the bottom plate is not protruded, and the saw blade can only be pushed out of the bottom plate by pressing down on the casing. Therefore, this kind of electric circular saw can realize plug-in cutting, that is, the bottom plate can abut against any position on the upper surface of the workpiece, and the casing can be pressed down. That is to say, the saw blade can extend out of the bottom plate through the through groove for cutting. Since the bottom plate is always in contact with the workpiece during the process of pressing down the saw blade, the cutting accuracy is high. Connected to the surface of the workpiece, the operator is not easy to see the processing line on the surface of the workpiece, and the visibility is poor

[0005] To sum up, these two kinds of electric circular saws have their own advantages and disadvantages, and cannot meet the needs of different users.

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