Power tool

Abstract

The invention relates to a power tool which comprises a head case and a main case, wherein a motor and a transmission mechanism are arranged in the main case; an output shaft stretches out from the head case, the output shaft can perform rotary oscillation movement around axis of the output shaft per se through the torque transfer of the transmission mechanism under the driving of the motor, and the output shaft is provided with a shaft body and a disk body with the radius larger than the shaft body. The power tool also comprises a spring, the spring is sheathed on the shaft body of the output shaft, both ends of the spring are respectively and tightly laminated to the inner end face of the disk body of the output shaft and a press plate on the shaft body sheathed on the output shaft, and the press plate is relatively fixed to the head case. The power tool inhibits the rotary oscillation of the output shaft by means of the spring sheathed on the output shaft, and vibrations produced on the output shaft and vibrations transferred to the output shaft from an asymmetrical balancing accessory are effectively absorbed, therefore, the vibrations transferred from the output shaft to the head case are further obviously reduced, the problem of numbing hands of a user caused by vibrations during a use process is greatly improved, and operation comfort is increased.

Description

technical field [0001] The invention relates to a power tool, especially a hand-held swing power tool. Background technique [0002] The multi-function machine is a common oscillating power tool in the industry, because its output shaft rotates and oscillates around the axis. Therefore, when different attachment working heads are installed on the output shaft, it can realize a variety of different operation functions, such as sawing, cutting, grinding, scraping, etc., to meet different working requirements. [0003] The more common multi-function machines currently on the market generally include a motor. The motor shaft of the motor is connected to an eccentric pin, and a bearing is sheathed on the eccentric pin, thereby forming an eccentric wheel structure. When the motor shaft rotates, the eccentric wheel structure can rotate eccentrically around the axis of the motor shaft. The output shaft of the multifunctional machine is set perpendicular to the motor shaft, and a s...

AI Technical Summary

Problems solved by technology

[0006] However, this shock absorption method mainly solves the vibration problem in the case of a bare machine or a symmetrically balanced accessory working head, such as a triangular grinding disc. If the user uses an asymmetrically balanced accessory working head, such as a straight saw sheet, this type of shock absorption will not be able to play a role in shock absorption

Because the action point of the straight saw blade is located on one side of the output shaft, it is unbalanced during the swing process, and it will also cause a large vibration, and this vibration will be transmitted to the housing through the output shaft, and the same Cause users to feel numb after long-term use

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