TWI602660B - Energy-saving electric screwdriver - Google Patents

Description

Energy-saving electric screwdriver

The invention relates to an improvement of an electric screwdriver, in particular to an energy-saving electric screwdriver which is environmentally friendly, energy-saving and economical.

According to the general idea, the electric screwdriver has been plugged into the power socket by using the power cord in the past, and has become a power supply by using the rechargeable battery so as not to be restricted by the power source; however, since the rechargeable battery has time. Restricted, so the electric screwdriver cannot be used when the power consumption is insufficient.

Secondly, when the electric screwdriver is used to lock the screw, regardless of the torque, the maximum horsepower output is used, and the user rarely adjusts the electric screwdriver to the maximum torque. The commonly used maximum torque value is between 30% and 80. Between %, especially when working with the horsepower of the maximum torque value, it will cause the electric screwdriver to generate heat, consume energy and reduce the life.

Furthermore, since the electric screwdriver is a small automatic tool that is manually operated, the battery size and capacity are limited, and the battery power consumption is often lost when it is used unconsciously.

The primary object of the present invention is to provide an energy-saving electric screwdriver capable of extending the life of the battery, improving the use efficiency, and switching operation through various energy-saving modes by combining a micro-controller (MCU), thereby enabling the electric screwdriver to be used in various Use different torque modes to select different functions and achieve double the battery's normal use time.

Another object of the present invention is to provide an energy-saving electric screwdriver, thereby achieving the prolonged service life of the rechargeable battery and achieving the substantial effect of real energy saving and carbon saving.

A further object of the present invention is to provide an energy-saving electric screwdriver, which is set by a micro-controller (MCU) of an electric screwdriver, including: database construction, tool failure maintenance automatic detection, self-writing, screw counting , multi-functional benefits of work area control and USB information output.

In order to achieve the above objectives, the inventor of the present invention designed a new energy-saving electric screwdriver, which mainly uses the setting of the micro-controller (MCU) to adjust the electric screwdriver with three-stage energy-saving use mode, including: full-open mode (Sport), general Mode (Normal), energy-saving mode (ECO); and adding a supercapacitor (Capacitor) to the battery in the control board inside the electric screwdriver, thereby using the micro-controller (MCU) in the control board at the rotation speed Under the premise of changing, the current limiting operation and the current output of different modes are controlled for different torque requirements, so that the current output of the battery is controlled, thereby achieving power saving effect in different energy saving modes, and reducing the battery due to current saving. The temperature not only saves power but also extends battery life.

The above energy saving mode (ECO) is set in the range of 30% to 50% and the slow start mode for the torque output and battery power output range.

The above general mode (Normal), the torque output and battery power output range are set in the range of 50% to 80% and the general startup mode.

In the above full-open mode (Sport), the torque output and battery power output range are set in the range of 80% to 100% and the quick start mode.

When the above-mentioned electric screwdriver is used in the energy saving mode (ECO) or the normal mode (Normal), when the load is greater than the output horsepower, the screw locking cannot be completed, and the micro control is performed. The MCU will automatically switch the switch from the original energy-saving mode (ECO) or normal mode (Normal) to the full-open mode (Sport) to complete the lock lock operation.

The above-mentioned setting of the microcontroller (MCU) further includes: database construction, tool fault repair automatic detection, self-writing, screw counting, work area control and USB information output function.

The embodiments of the present invention are described below in conjunction with the drawings. The following examples are set forth to illustrate the invention and are not intended to limit the scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

(1) ‧‧‧Energy-saving electric screwdriver

(10) ‧‧‧Shell

(11)‧‧‧ chuck device

(12)‧‧‧ board machine

(2)‧‧‧Switch

(3) ‧‧‧Supercapacitor (Capacitor)

(4) ‧‧‧Gold oxygen field effect transistor (MOSFET)

(5) ‧‧‧Microcontrollers (MCUs)

(6) ‧‧‧Battery

(7)‧‧‧Motor device

The first figure is an external view of an electric screwdriver of a preferred embodiment.

The second drawing is a bottom view of the electric screwdriver of a preferred embodiment.

The third figure is a circuit diagram of a control device of a preferred embodiment.

The fourth figure is a flow chart of the energy saving mode of a preferred embodiment.

The fifth drawing is a general mode flow diagram of a preferred embodiment.

The sixth drawing is a flow chart of the full open mode of a preferred embodiment.

Figure 7 is a flow chart showing the actual operation of the control device of a preferred embodiment.

In the eighth diagram (A), a battery which is charged and discharged more than 500 times is used, and is respectively incorporated in the present invention and a general electric screwdriver, and a comparison table for the actual use current of the motor is used.

The eighth figure (B) is a comparison table in which the brand new battery is separately loaded into the present invention and a general electric screwdriver for the actual current used by the motor.

The eighth figure (C) is a comparison table of the number of times the screws are locked for different energy-saving modes under the same capacity and fully charged battery.

Fig. 8(D) is a comparison table of changes in temperature between the present invention and a general electric screwdriver under normal use time.

Referring to the first figure, an energy-saving electric screwdriver according to a preferred embodiment is disclosed. The electric screwdriver (1) is of a charging type and has a set of matching housings (10) externally. (10) The form is not limited, such as a pen type, a gun type, etc., in this case, a gun type, and the inside of the casing (10) is provided with: a motor device (not shown), a gear device (the surface is not Display), clutch device (not shown), chuck device (11), trigger device (12) and control device (not shown); these devices are the basic structure of a general (brushless) electric screwdriver and The function is not the focus of the application, so it will not be repeated.

The energy-saving electric screwdriver of the present invention can further be added to the accelerator (or supercharger) device which the inventor has previously approved in the national novel patent No. M444913, that is, the accelerator device is disposed at the power output shaft position of the motor device to achieve the slowing down. The starting effect, thereby increasing the horsepower of the (brushless) motor by about twice the horsepower, but the power consumption is only increased by about 30%. This method can shorten the time for locking the screw and increase the working efficiency; and a torque external adjustment The LOCK device is disposed at the position of the chuck device (11) of the energy-saving electric screwdriver (not shown) to prevent the user from adjusting the torque value arbitrarily, affecting the screw lock quality, and effectively managing the product quality.

Referring to the second figure, the present invention mainly combines an electric screwdriver with a multi-function micro-controller (MCU); the micro-controller (MCU) (5) includes: a database construction (including The total number of tool lock screws, the number of times of work, the number of OK/NG, Regular inspection can effectively manage and check the quality of work; tool fault repair automatic detection (including over temperature display, over current display, over voltage display, start open damage, MOS damage, MCU damage, brake plate damage), to facilitate maintenance; self-write Record (including tool code, LED light selection, buzzer selection, steering selection, start time setting, brake time setting, operation time setting) to achieve power saving and reliable work management; screw count (including OK/NG times) Display, screw length setting, screw total angle setting), can reduce the error rate when locking the screw; work area control (can be set to limit the use in a specific area), can not be used in non-specific areas, reduce mis-locking, easy to improve quality Management; and USB information output function (all data connected to the PC, can be downloaded, read and recorded, and then connected to the main computer for quality management, and do all the above functions, easy to input management to reduce errors), without Purchase counting display and data input machine for easy operation and management.

As shown in the second figure, in addition to the above-mentioned microcontroller (MCU) (5), the control device of the energy-saving electric screwdriver is further provided with an ultra-capacitor and a rechargeable battery in the internal structure to jointly provide the electric screwdriver ( 1) Power required at startup. In a specific implementation, the structure of the control device includes at least: a power-saving mode switch (2), a supercapacitor (3), a gold-oxygen field-effect transistor (MOSFET) (4), and a microcontroller (MCU). (5); the input end of the control device is electrically connected to the rechargeable battery (6), and the output end is electrically connected to the motor device (7).

Referring to the third figure, the operating principle of the control device is as follows: the starting current is output by the battery (6), and the different energy-saving modes are corresponding to the switching switch (2), and the control is performed by the control of the microcontroller (MCU) (5). The current output of different degrees and proportions (such as 50%, 80%, 100%), and the remaining current is supplemented by the Capacitor (3) supply, and the micro-controller (MCU) (5) controls the gold-oxygen field. After the action transistor (MOSFET) (4) acts, it drives the horse. The device (7) starts up; therefore, the main function of the control device in this case is to control the current of the normal start, use and stop of the electric screwdriver (1), but the rotation speed is constant, so the performance and quality of the locking screw are not affected.

The descriptions of the various operating modes and functions of the energy-saving electric screwdrivers are as follows: Among them, the energy-saving mode (ECO) means that the torque output range is set within the range of 30% to 50%, and the motor device is in the slow start mode. Current output; Normal mode means that the torque output range is set within the range of 50%~80%, and the motor device is in the normal start mode; the full open mode (Sport) means that the torque output range is set at 80%~100. Within the range of %, and the motor unit is in the quick start mode.

Please refer to the energy saving mode flow chart shown in the fourth figure. According to the figure, the battery (6) supplies current through the switch (2), and then stores part of the current in the supercapacitor (3), and controls the gold-oxygen field effect by using the microcontroller (MCU) (5). A transistor (MOSFET) (4) drives the motor unit (7) to operate. Since the motor unit (7) requires a large current to start, a large current is supplied from the supercapacitor (3) to make the motor unit ( 7) It can be operated in a slow start mode without the need to provide a large current required for starting by the battery. After the motor device (7) is operated, the battery (6) is continuously supplied with power; in terms of performance, when the switch is switched (6) When cutting to the energy saving mode (ECO), if the motor (7) presets the maximum horsepower to be 50%, the battery (6) supplies 50% of the power, so at load, only 50% of the horsepower is output.

Please refer to the general mode flow chart shown in the fifth figure; as shown in the figure, when the switch (2) is switched to the normal mode (Normal), if the maximum horsepower of the preset motor unit (7) is 80%, The battery (6) is only supplied with 80% of the electric power, and the motor device (7) can be driven to operate in the normal starting mode, and in actual use, the maximum output horsepower of the motor device (7) is It is 80%.

Please refer to the full-open mode flow chart shown in the sixth figure; as shown in the figure, when the switch (2) is switched to the full-open mode (Sport), if the maximum horsepower of the preset motor unit (7) is 100% The battery (6) will supply 100% of the power and drive the motor unit (7) to perform the quick start mode, so the maximum output horsepower of the motor unit (7) is 100% in actual use.

If the energy-saving electric screwdriver (1) is used in the energy-saving mode (ECO) or the normal mode (Normal), the load is greater than the preset maximum output horsepower (50% or 80%), so that the screw lock cannot be completed. The controller (MCU) (5) will automatically switch the switch (2) from the original energy-saving mode (ECO) or the normal mode (Normal) to the full-open mode (Sport), making the energy-saving electric screwdriver (1) the most provincial. The operation of locking the lock wire is completed in an electric state.

Referring to the seventh figure, it is a flow chart after the actual use of the electric screwdriver. As shown in the figure, when the battery (6) is used for reverse charging, there is an aging condition, and the power is only 60% of the original, but when the power demand of the energy-saving electric screwdriver (1) needs 80%, the insufficient portion will be supercapacitor. (Capacitor) (3) provides supplements, which in turn drive the operation of the motor unit (7) to achieve normal operation; thus, not only can increase the service life of the battery, reduce the endless consumption of battery power, and achieve the real benefits of real energy saving and carbon saving. .

Finally, please refer to the eighth figure (A) ~ (D), which is a chart of the actual use of the battery used in the energy-saving electric screwdriver of the present invention and the general electric screwdriver; wherein the eighth figure (A) (B) The battery will be charged and discharged more than 500 times and brand new batteries, respectively, on the present invention and the general electric screwdriver, for the actual use of the motor as a comparison table, it can be clearly seen from the figure is equipped with ultra-capacitor The invention, whether it is new or has gradually deteriorated In the case of the pool, the current supplied by the battery required for starting the motor device is significantly smaller (less), and the measured value can save 25 to 35% of the power, which naturally achieves a power saving effect.

Figure 8 (C) is a comparison table of the number of times the screws are locked for different energy-saving modes under the same capacity and fully charged battery. The chart shows that the horsepower and the maximum current are fully open in the full-open mode (Sport). The output of the maximum torque can be obtained. After the actual measurement, the energy-saving electric screwdriver of the present invention can perform the locking operation of about 1500 times; in the normal mode, since the battery current output is controlled, the motor device obtains more horsepower after the actual measurement. And 80% output with maximum torque, 50% more screw locks, about 1700 locks after actual measurement; in energy-saving mode (ECO), start, use, stop current for control (about maximum 50% of the current and the maximum current, but the speed is constant, only the action of limiting the current, so that the current output is controlled, the power saving method can be achieved (about 70% of the power can be saved), and the energy can be saved nearly twice The number of screw locks was about 2,300 times after the actual measurement, so the efficiency of the energy-saving electric screwdriver was significantly improved.

Figure 8 (D) is a comparison table of the temperature changes of the present invention and a general electric screwdriver under normal use time. It can be clearly seen from the figure that the present invention equipped with the supercapacitor is continuously used for 2 hours, and the temperature rise is only Generally, one or a half of the electric screwdrivers, that is, under a long period of operation, the temperature rise of the battery is smaller than usual, and naturally achieves the effect of prolonging the service life of the battery.

(2)‧‧‧Switch

(3) ‧‧‧Supercapacitor (Capacitor)

(4) ‧‧‧Gold oxygen field effect transistor (MOSFET)

(5) ‧‧‧Microcontrollers (MCUs)

(6) ‧‧‧Battery

(7)‧‧‧Motor device

Claims (7)

An energy-saving electric screwdriver refers to a control device structure of the electric screwdriver including: a power-saving mode switching switch, a supercapacitor, a gold-oxygen field effect transistor (MOSFET), and a micro-controller (MCU) electrically connected to each other; The input end of the control device is electrically connected to the battery, and the output end is electrically connected to the motor device. The energy-saving electric screwdriver according to claim 1, wherein the energy-saving mode further includes a full-open mode (Sport), a normal mode (Normal), and an energy-saving mode (ECO). For example, the energy-saving electric screwdriver described in claim 2, wherein the energy-saving mode (ECO) torque output range and the battery power output are set in the range of 30% to 50% and the slow start current output. For example, the energy-saving electric screwdriver described in claim 2, wherein the normal mode (Normal) torque output and the battery power output range are set in the range of 50% to 80% and the general starting current output. For example, the energy-saving electric screwdriver according to item 2 of the patent application scope, wherein the full-open mode (Sport) torque output and the battery power output range are set in the range of 80% to 100%, the fastest starting current output. For example, the energy-saving electric screwdriver described in claim 2, wherein the electric screwdriver encounters a load greater than the output horsepower when the energy-saving mode (ECO) or the normal mode (Normal) is used, and the screw locking cannot be completed, the microcontroller (MCU) The switch will be automatically switched from the original energy-saving mode (ECO) to the full-open mode (Sport) to complete the lock lock operation. For example, the energy-saving electric screwdriver described in claim 2, wherein the setting of the micro-controller (MCU) further includes: database construction, automatic detection of tool failure maintenance, self-writing, screw counting, work area control And USB information output function.