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Handheld electric tool

A power tool and hand-held technology, applied in the field of hand-held power tools, can solve the problems of brake device damage and impact on service life, and achieve the effects of improving service life, preventing excessive temperature, and facilitating rapid heat dissipation

Active Publication Date: 2018-04-06
NANJING CHERVON IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the braking process, the angle grinder generates a lot of heat due to friction, which can easily cause damage to the braking device and affect the service life

Method used

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Examples

Experimental program
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Embodiment Construction

[0025] Such as Figure 1 to Figure 4 As shown, a hand-held electric tool 100 includes: a grinding disc 10 , a shield 20 , an output shaft 30 , a motor 40 , a handle 50 , a transmission mechanism 60 , a housing 70 and a braking device 80 . Specifically, the handheld electric tool 100 is an angle grinder.

[0026] The grinding disc 10 is used for realizing tool functions such as grinding or cutting. The shield 20 at least partially covers the grinding disc 10 to achieve a protective function. The hand-held electric tool 100 also includes a quick-clamp mechanism 21 , which is used to quickly install or disassemble the shield 20 , and can also be used to adjust the position of the shield 20 . The output shaft 30 is used for installing or fixing the grinding disc 10 . The motor 40 drives the output shaft 30 to rotate. The motor 40 includes a drive shaft 41 , a rotor 42 and a stator 43 . The rotor 42 rotates relative to the stator 43 . The drive shaft 41 can also be called a m...

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PUM

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Abstract

The invention discloses a handheld electric tool. The handheld electric tool comprises an output shaft, a motor, a fan, a shell and a braking device, wherein the output shaft is used for fixing a polishing disc; the motor comprises a driving shaft for driving the output shaft to rotate, and the driving shaft rotates around the central axis; the fan is fixed to the driving shaft and driven to rotate by the driving shaft; the shell is used for mounting the motor; and the braking device is used for braking the motor. The braking device comprises a fixed braking part and a movable braking part, wherein the fixed braking part is fixed to the driving shaft and rotates synchronously with the driving shaft; the movable braking part moves between a braking position and a separation position relative to the fixed braking part; at least two friction parts distributed in the circumferential direction of the central axis are arranged on the movable braking part; the friction parts are used for being in contact with the fixed braking part so as to brake the motor through friction force; a clearance groove is formed in the position, between the two adjacent friction parts, in the movable brakingpart in the circumferential direction of the central axis; and the fan rotates to drive an air flow to penetrate through the clearance groove. The handheld electric tool can conduct braking rapidly, the braking device has a good heat dissipation effect, and the service life is long.

Description

technical field [0001] The invention relates to a hand-held electric tool, in particular to a hand-held electric tool with a braking device. Background technique [0002] Power tools include motors. The motor is used in the work attachment to perform the tool function. When the motor is located at the power source, the power tool can also be called a hand-held power tool. [0003] The angle grinder is a hand-held electric tool, and the grinding disc is a working accessory of the angle grinder, which is often used for cutting and grinding. When the user turns off or releases the switch, the grinding disc needs to be stopped quickly to prevent human body from accidentally touching and causing injury. [0004] The angle grinder generates a lot of heat due to friction during the braking process, which can easily cause damage to the braking device and affect the service life. Contents of the invention [0005] In order to solve the deficiencies of the prior art, the purpose...

Claims

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Application Information

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IPC IPC(8): B24B23/02B24B55/10
CPCB24B23/02B24B23/022B24B55/102
Inventor 魏为
Owner NANJING CHERVON IND
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