ENERGY-EFFICIENT ELECTRIC SCREW DRIVERS

• US 20150306748A1
• Filed: 04/23/2014
• Published: 10/29/2015
• Est. Priority Date: 04/23/2014
• Status: Abandoned Application

• Current Assignee: Hsiu-Lin Hsu
• Original Assignee: Hsiu-Lin Hsu
• Inventors: Hsu, Hsiu-Lin
• Application Number:
  US14/259,441
• Publication Number:
  US 20150306748A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B25B 21/00 Portable power-driven screw or nut setting or loosening tools; details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00; for mounting or dismounting wheels B60B29/006; Attachments for drilling apparatus serving the same purpose machines B23P19/06
• CPC Class Codes: B25F 5/00 Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Abstract

An energy-efficient electric screw driver designed to have three adjustment modes, including: Sport, Normal and ECO. The capacitor is mounted in the control panel of the electric screw driver and is combined with the battery for use. MCU can limit and change current at different torsions and startup current when the rotating speed is constant. The battery current output can be controlled. At different modes, the power saving effect can be achieved. Lower current also reduces battery temperature, saves power and prolongs battery life.

Claims

1. An energy-efficient electric screw driver;

the control device structure of the electric screw driver comprises;

the energy-efficient switch, capacitor, MOSFET and MCU can be connected electrically;

the control device output is electrically connected with the battery and the output is electrically connected with the motor.

2. The energy-efficient electric screw driver as claimed in claim 1, wherein energy-saving modes include Sport, Normal and ECO.

3. The device defined in claim 2, wherein ECO means range of the torsion output and battery output is 30%˜

50% and soft startup current output.

4. The energy-efficient electric screw driver as claimed in claim 2, wherein Normal means range of the torsion output and battery output is 50%˜

80% and general startup current output.

5. The an energy-efficient electric screw driver as claimed in claim 2, wherein Sport means range of the torsion output and battery output is 80%˜

10% and rapid startup current output.

6. The energy-efficient electric screw driver as claimed in claim 2, wherein load of the electric screw drivers at ECO or Normal is greater than the output horsepower, and the screw locking cannot be finished;

MCU can automatically adjust the switch from ECO to Sport to finish screw locking.