Electric tool

A technology of electric tools and power supply, which is applied in the direction of manufacturing tools, AC motor control, motor speed or torque control, etc., and can solve the problems of inconvenient use of electric tools

Pending Publication Date: 2018-07-31
NANJING CHERVON IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

AC-powered tools are usually only usable close to an electrical outlet, making it inconvenient to use a power tool in a working area away from an electrical outlet

Method used

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Embodiment Construction

[0024] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0025] refer to Figure 1 to Figure 3 In the illustrated electric tool 100 , for the convenience of description, a miter saw is introduced as one of the embodiments of the electric tool.

[0026] The miter saw includes: a base 101 , a workbench 102 , a saw blade 103 , a power circuit 110 , a connection circuit 120 and a motor 130 . The base 101 is used to support the workbench 102, and the miter saw can be placed stably on the ground or on an operating plane. The workbench 102 is rotatably connected to the base 101 and is used for placing workpieces. The saw blade 103 is pivotally connected to the workbench 102 through a bracket, and is used for cutting workpieces. The motor 130 is used to provide a power source, and the motor 130 drives the saw blade 103 to cut the workpiece placed on the workbench 102 .

[0027] The overall structur...

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PUM

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Abstract

The invention discloses an electric tool. The electric tool comprises a motor, a power circuit, a connecting circuit and a signal source. The motor comprises a plurality of windings; the power circuitis used for connecting with a first power supply and / or a second power supply so as to supply power to the motor, and comprises an output positive electrode and an output negative electrode for outputting electric energy; the connecting circuit comprises a switching device so as to enable the connecting circuit to have a first connecting state for enabling the windings with the first quantity toconnect between the output positive electrode and the output negative electrode, and a second connecting state for enabling the windings with the second quantity to connect between the output positiveelectrode and the output negative electrode; and the signal source is used for sending a first control signal to the switching device when the power circuit is connected with the first power supply so as to enable the connecting circuit to be at the first connecting state, and sending a second control signal to the switching device when the power circuit is connected with the second power supplyso as to enable the connecting circuit to be at the second connecting state. The electric tool has basically same output performances when connecting with the power supplies with different voltages.

Description

technical field [0001] The invention relates to an electric tool, in particular to an electric tool capable of being connected to different power sources. Background technique [0002] Existing electric tools include two types, one is powered by an AC power supply, and the other is powered by a DC power supply. Tools powered by AC power are usually only used close to a power outlet, and it is inconvenient to use a power tool in a working range far from the power outlet. This requires a DC power supply so that AC power tools can work away from the power outlet. [0003] For electric tools powered by DC power supply, due to the limited power reserve of the DC power supply, when the power of the DC power supply is exhausted, if you can choose to connect the AC power supply or a DC power supply with sufficient power to make the electric tool continue to complete the work, it will bring great benefits to the user. Great convenience. [0004] Therefore, it is necessary to desig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25F5/00H02M1/10
CPCB25F5/00H02M1/10H02P27/06B23D45/044B23D47/12H02P4/00
Inventor 王宏伟徐谦
Owner NANJING CHERVON IND
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