Hand-held electric tool

A technology for hand-held power tools and handles, applied in power tools, manufacturing tools, varistors, etc., can solve the problem of easy wear and tear of potentiometers, achieve convenient holding and operation, reduce overall size, and reduce outer diameter. Effect

Active Publication Date: 2008-07-23
POSITEC POWER TOOLS (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It should also be emphasized that the potentiometer is prone to wear after a period of use, which may be affected b

Method used

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Examples

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Embodiment Construction

[0022] like figure 1 As shown, in this embodiment, the hand-held electric tool 2 is an electric drill powered by a battery 4 and has a housing 6 . The housing 6 includes a top 8, a handle 10 extending downward from the top 8, and a foot 12 at the bottom of the handle. In the top 8, a DC motor 14, a motor fan 16 for cooling the motor 14, a gear reduction system 18 connected with the motor 14 through a motor shaft 20, and a printed circuit board 22 are arranged on the circuit board 22. The element is used to control the rotational speed of the motor 14 . An output shaft 24 extends from the gear reduction system 18 and protrudes from the housing 6 and is connected to a chuck 26 . When the electric drill is working, a working head 28 is clamped in the chuck 26 to process the workpiece (not shown).

[0023] The handle 10 has a relatively small outer diameter D, in this embodiment the outer diameter D is 4 cm, of course it can also be smaller. A speed regulating switch 30 is arr...

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Abstract

The invention relates to a hand-held electric tool, comprising a shell which is provided with a handle, a motor which is arranged in the shell and used for driving a working head and controlling the rotation speed of the working head when working, a displacement button which is arranged on the handle and used for being pressed by the operator, an elastic part which is combined with the displacement button, a pressure sensor which is connected with the elastic part and provides the output voltage according to the position of the displacement button, and a control component which is connected with the motor and variably controls the rotation speed of the motor by responding the output voltage according to the position of the displacement button. By adopting the structure, the integral dimension of the speed regulating switch is greatly reduced, and then the dimension of the external diameter of the handle is reduced, thus being convenient for the holding and operation of the operators with comparatively small hand shape.

Description

technical field [0001] The invention relates to a hand-held electric tool, in particular to a hand-held electric tool capable of adjusting the rotating speed of a working head. Background technique [0002] Existing hand-held electric tools, such as electric drills or electric screwdrivers, usually adjust the rotational speed of the working head through the operator's operation of a speed control switch. It generally consists of a case with a top, a handle attached to the top, and a compartment below the handle for the battery. The electric tool also has a button arranged on the handle for the operator to press, and a speed control switch connected with the button. The speed control switch includes a potentiometer (potentiometer), which is used to measure the distance traveled by the button under the action of the operator's pressure and generates an electrical signal proportional to the distance traveled, which is transmitted to the control element and further transmitted ...

Claims

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Application Information

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IPC IPC(8): B25F5/00B25F5/02H01C7/10H02P7/06B23B45/02B25B21/00
Inventor 强尼·鲍瑞那图
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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