Electric circular saw
AssigneeNanjing Chervon Industry Co., Ltd.
InventorsCong Li, Shisheng Wang, Mingqi Zhou
Life of this patent
Estimating the term…
Abstract
An electric circular saw includes a motor, a transmission assembly, a housing assembly, a base plate, and a fan shield. The housing assembly includes a gearbox. The base plate includes a base plate plane surface. The fan shield includes a flow guide part and a fitting part. The fitting part is connected to the gearbox. The transmission assembly includes a worm and a worm gear. A tip diameter of the worm is greater than or equal to 20 mm and less than or equal to 30 mm and a tip diameter of the worm gear is greater than or equal to 20 mm and less than or equal to 35 mm. When the electric circular saw has a maximum cutting depth, a vertical distance between a center of the worm gear and the base plate plane surface is less than or equal to 25.5 mm.
Claims9
An electric circular saw, comprising:
- a motor;
- a saw blade driven by the motor to rotate about a first axis;
- a transmission assembly connecting the motor to the saw blade;
- a housing assembly comprising a gearbox wherein the gearbox is configured to support the transmission assembly;
- a base plate connected to the housing assembly having a base plate plane surface for contacting a workpiece;
- a fan driven by the motor to generate a heat dissipation airflow;
- and
- a fan shield, which is at least in part disposed along a circumferential direction of the fan;
- wherein the fan shield comprises:
- a flow guide part configured to guide a flow direction of the heat dissipation airflow;
- and
- a fitting part disposed around the flow guide part in a circumferential direction of the flow guide part and connected to the gearbox;
- and
- wherein the transmission assembly consists of a single worm, a single worm gear that meshes with the worm, and an output shaft extending along the first axis, the worm gear is connected to the saw blade via the output shaft and configured to drive the saw blade, the first axis penetrates through a center of the worm gear, the worm is connected to the motor, a tip diameter of the worm gear is greater than or equal to 20 mm and less than or equal to 35 mm, a tip diameter of the worm is greater than or equal to 20 mm and less than or equal to 30 mm, the base plate is rotatable with respect to the housing assembly and has a first position where the electric circular saw has a maximum cutting depth, and a vertical distance between the center of the worm gear and the base plate plane surface is less than or equal to 25.5 mm when the base plate is at the first position,
- wherein the worm extends along a second axis, and an angle between the second axis and the base plate plane surface is greater than or equal to 10 degrees and less than or equal to 18 degrees when the base plate is at the first position, and
- wherein, the saw blade has a diameter of 7.25 inches, the maximum cutting depth of the electric circular saw is greater than or equal to 64.5 mm and less than or equal to 68.5 mm.
Dependencies are inferred from the claim text.