Electric power tool

Abstract

An electric power tool is provided which prevents malfunction with excellent operability even when one operation mode among various modes is selectable. In a gear case (12) of a housing (2), there are provided a clutch switching groove (65) which engages with a connecting projection (62) of a clutch switching lever (57), a slit (81) which guides a guide body (82) having a stepped pin (83) which penetrates an impact switching groove (84) to engage with an auxiliary ring (78), and a percussion switching groove (101) which engages with a connecting projection (98) of a percussion switching lever (93). In addition, a switching case (64) is externally provided, so that combination of sliding positions of each switching member (57, 82 or 93) can be changed. As the switching case (64) can be operated by a switching button (30), any of all operation modes, which are, a drill mode, an impact mode, a percussion drill mode, and a clutch mode can be selected with the switching button (30) only.

Description

technical field [0001] The present invention relates to an electric power tool capable of giving intermittent blows or vibrations in the axial direction to an output shaft protruding from the front of a casing by selecting an operation mode. Background technique [0002] As an electric tool, for example, an impact tool described in Patent Document 1 and the like are known. Here, the rotation of the output shaft of the motor is transmitted to the drive shaft inside the housing through the planetary gear reduction mechanism. The arm of the anvil (output shaft) protruding from the front of the main body case is engaged to transmit the rotation of the drive shaft to the anvil via the hammer. When the load on the hammer anvil is high, the hammer moves backward due to the rotation of the ball, and the engagement with the arm of the hammer anvil is temporarily released, and the coil spring advances again to engage with the arm again. The movement of the hammer generates intermitt...

AI Technical Summary

Problems solved by technology

[0011] When there are many selectable action modes like this, it is necessary to separately operate the impact switching member for switching the impact mode and the drilling mode, the clutch switching member and the vibration switching member for switching the drilling mode to the clutch mode or the vibration drilling mode, thereby Poor operability and prone to misuse

[0012] On the other hand, in the above-mentioned vibratory drilling, since the loading device for loading the main shaft to the forward position and the loading device for loading the chuck sleeve are respectively provided, the number of parts increases, the structure is complicated, and the time for assembly is also increased. closely related to cost increase

Images