Angle grinder and hand-held electric tool
A power tool, hand-held technology, used in manufacturing tools, grinding machines, grinding racks, etc., can solve the problems of heavy weight, poor heat dissipation, easy to produce fatigue, etc., to achieve light weight, ingenious fan design, small size Effect
Pending Publication Date: 2020-01-03
NANJING CHERVON IND
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Problems solved by technology
At present, most cylindrical angle grinders have the problems of large size and heavy weight, and users are prone to fatigue after long-term use; in addition, there may be problems of poor heat dissipation when the rated power of the angle grinder is guaranteed to be a large value.
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[0037] figure 1 The handheld electric tool 100 shown can be an electric tool for working indoors or outdoors. In this embodiment, the handheld electric tool 100 is specifically an angle grinder as an example, and the handheld electric tool 100 can be held by a user For grinding or cutting metal, stone, etc. In this embodiment, the hand-held electric tool 100 is a cylindrical angle grinder, and the user operates the machine by holding the cylindrical body. Electric tools, such as electric drills, screwdrivers, etc., are not limited here, as long as the hand-held electric tools applicable to the technical solution of the present invention are within the protection scope of the present invention.
[0038] like Figure 1 to Figure 4 As shown, the hand-held electric tool 100 includes a housing assembly 11 , a fan 12 , a motor 13 , a transmission device 14 , and working accessories. In this embodiment, the working accessory is specifically a grinding disc 15 . For convenience of ...
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The invention discloses an angle grinder and a hand-held electric tool. The angle grinder comprises an output shaft, a motor, a transmission device, a fan and a shell assembly, wherein the output shaft is used for mounting a grinding piece; the motor is used for driving the grinding piece to rotate, the motor comprises a stator and a rotor, and a motor shaft of the motor rotates with the first axis as the axis; the transmission device is used for connecting the motor with the output shaft; the fan rotates with the first axis or the axis parallel to the first axis as the axis; an accommodatingspace for accommodating the fan and the motor is formed in the shell assembly; the shell assembly comprises a motor shell for accommodating the motor, and the motor shell basically extends along the first axis; and the minimum internal diameter D1<min> of the motor shell, the diameter d of the fan and the heat exchange surface area A of the motor constitute a functional relationship of D1<min>=f(d, A), and the minimum internal diameter D1<min> of the motor shell is 4-12 mm greater than the diameter d of the fan. The angle grinder and the hand-held electric tool which are smaller in size, lowerin weight and good in heat dissipation effect can be provided by the invention.
Description
technical field [0001] The invention relates to an electric tool, in particular to an angle grinder and a hand-held electric tool. Background technique [0002] The application of electric tools is becoming more and more extensive, and with the increase of application occasions and types of workpieces, higher requirements are put forward for the size and convenience of use of various electric tools. Under the premise, the hand-held electric tools are required to have smaller size, lighter weight and good heat dissipation performance. Angle grinders are tools that use high-speed rotating grinding discs to grind, cut, and polish workpieces. At present, most angle grinders are electric angle grinders. According to the holding method of angle grinders, they can be divided into cylinder type and rear handle type. The cylindrical angle grinder generally has less power and can be operated by the user with one hand. At present, most cylindrical angle grinders have the problems of ...
Claims
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IPC IPC(8): B24B23/02B24B41/02B24B55/02
CPCB24B23/028B24B55/02B24B41/02
Inventor 杨青松祝启鹏
Owner NANJING CHERVON IND