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US 8,911,320 B2Granted
Power tool
AssigneeMakita Corporation
InventorsManabu Tokunaga, Akihiro Ito, Shinji Hirabayashi
Life of this patent
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Abstract
In a disc grinder, a spindle mounted with a grindstone intersects an output shaft of an electric motor. The disc grinder includes the three-point pressing continuously-variable transmission between the output shaft of the electric motor and a bevel gear train. The bevel gear train is used for deceleration. The traction grease having a high traction coefficient is used as the lubricant of the traction drive. A grease reservoir or felt members arranged in sliding contact with the pressing parts are disposed in the transmission case.
Claims22
A power tool comprising:
- a continuously-variable transmission traction drive, the continuously-variable transmission drive having an output shaft and a spindle;
- and
- a tool tip to be mounted on the spindle,
- wherein the spindle is not aligned coaxially with the output shaft of the continuously-variable transmission, and
- wherein the spindle is arranged to intersect the output shaft of the continuously-variable transmission.
2 more elements
A power tool comprising:
- a continuously-variable transmission traction drive, the continuously-variable transmission drive having:
- a solar roller provided on a motor shaft,
- planetary rollers pressed on the solar roller,
- a carrier aligned coaxially with the motor shaft, the carrier configured to rotatably support the planetary rollers,
- an output shaft aligned coaxially with the motor shaft, torque of the motor shaft being transmitted to the output shaft through the solar roller and the planetary rollers, and
- a spindle;
- and
- a tool tip to be mounted on the spindle,
- wherein the spindle is not aligned coaxially with the output shaft of the continuously-variable transmission.
6 more elements
Dependencies are inferred from the claim text.