Electric drill with driving mode switching

A driving mode and electric drill technology, which is applied in the manufacture of tools and portable mobile devices, etc., can solve the problems of many parts in the transmission link of mode switching, large running resistance, and cumulative error affecting performance, etc.
CN102431013AActive Publication Date: 2012-05-02NANJING JIUCHI ELECTROMECHANICAL IND
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING JIUCHI ELECTROMECHANICAL IND
Publication Date
2012-05-02

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Abstract

The invention relates to an electric drill with driving mode switching, belonging to the technical field of electric tools. The electric drill comprises a motor, a function switching cup and a torque regulating cup, wherein the motor is connected with an output shaft through a reducing mechanism in transmission mode. The invention is improved in the following ways: the other end of a conjunction piece abuts against one end of a locking ring; the other end of the locking ring is connected with an axial pressure regulating mechanism driven by the torque regulating cup; when the function switching cup is in a first switching position, contrate teeth of the movable and static impact rings are separated, and the locking ring forms axial constraint on the conjunction piece; when the function switching cup is in a second switching position, the contrate teeth of the movable and static impact rings remain separated, and the locking ring loses axial constraint on the conjunction piece; and when the function switching cup is in a third switching position, the contrate teeth of the movable and static impact rings abuts against each other, and the locking ring forms axial constraint on the conjunction piece. The invention can lower the manufacturing and assembly cost, is beneficial to avoiding poor quality caused by accumulated tolerance, and is easier to operate.
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Description

technical field

[0001] The invention relates to an electric drill, in particular to an electric drill with driving mode switching, and belongs to the technical field of electric tools. Background technique

[0002] A hand-held electric drill capable of drilling, screwing, and impact mode switching is a commonly used electric tool that has been widely used.

[0003] The early US patent No. US6142242 discloses the following technical solution of this electric drill (note: for ease of interpretation, the part numbers corresponding to the drawings of the US6142242 embodiment are in parentheses in this paragraph): a percussion drill, including a motor (3 ) of the main body shell (2); the planetary gear reduction mechanism (10) installed in the main body shell, the planetary gear reduction mechanism is provided with a rotatable internal gear (13), an input end that can be installed on the motor, and a A cam mechanism (17, 18, 19) that transmits rotational power to the output of t...

Claims

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