Handheld electric circular saw

Abstract

The invention discloses a handheld electric circular saw. The handheld electric circular saw comprises an enclosure (1), an output shaft extending out of the enclosure (1), a saw blade (2) arranged on the output shaft, a first protection cover (3) used for containing the saw blade (2) and a bottom plate (4), wherein a drive mechanism is arranged in the enclosure (1), and the first protection cover (3) and the enclosure (1) are fixed. The handheld electric circular saw is characterized in that the electric circular saw further comprises a second protection cover (5) capable of surrounding saw tooth positions of the saw blade (2) above the bottom plate (4) when the circular saw works or stops, and the second protection cover (5) and the bottom plate (4) are fixed. The handheld electric circular saw has few components and is simple in structure, a spring or other structures are prevented from being utilized by the lower protection cover, good reliability is achieved, and convenience is brought to overall circular saw assembly and design.

Description

technical field [0001] The invention relates to the technical field of electric tools, in particular to a hand-held electric circular saw. Background technique [0002] The electric circular saw is a tool that uses the motor as the power to drive the circular saw blade through the transmission mechanism for sawing operations. It has the characteristics of safety, reliability, reasonable structure, and high work efficiency. [0003] Currently there is an electric circular saw on the market, which includes a casing, an output shaft extending out of the casing, a saw blade arranged on the output shaft and a protective cover for accommodating the saw blade; Composed of a guard and a static guard, it is used to protect the circular saw blade and prevent injury accidents during operation. The static shield is connected with the casing, and the movable shield rotates along the circular saw blade and automatically covers the saw blade by the pressure of the torsion spring. The mov...

AI Technical Summary

Problems solved by technology

[0005] 1. During processing, the moving shield needs to be processed separately. During installation, there is a structure of rotational connection between the moving shield and the bottom plate, and the cooperation of the torsion spring or the guide mechanism is also required, which results in a large number of parts and a complex structure. Complicated and complex to assemble

[0006] 2. Since every time the circular saw is used to press down, the movable shield needs to be swung once. If the movable shield is swung for a long time, a lot of powder and other impurities will be generated during the use of the circular saw. These conditions are likely to cause the torsion spring to fail, or The rotating structure is stuck or the guiding structure is stuck, etc., so that the moving guard is stuck or cannot be reset normally, which greatly reduces the reliability of the electric circular saw

In addition, the assembly needs to accurately calculate the gap between the moving shield and the fixed shield, so that the fixed shield will not collide with the moving shield when it is pressed down; and because the swing center of the moving shield is rotationally connected with the output shaft of the casing In this way, high precision and durability are required in both design and assembly, so that the moving shield can swing normally for a long time, which brings difficulties to design and assembly

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