The charging head network has purchasedBosch GO electric screwdriver, which is equipped with 18650 lithium battery and powered by a brush motor.The screwdriver is charged with Micro USB interface, and the package is equipped with charger and data cable.It is also equipped with 28 screwdriver heads and extension rods, ready for use, to meet the needs of daily assembly and maintenance.
This screwdriver is also packed in a metal suitcase, which is not only fully configured, but also upgraded for self use or free gifts.The screwdriver handle is equipped with a positive and reverse switch, a power indicator and a torque adjustment dial, which can be used in different scenarios.It is brought by the charging head network belowBosch Disassemble the GO electric screwdriver to see the design and materials inside.
Bosch GO electric screwdriver is packed in a metal suitcase, with BOSCH brand design on the front, which looks very high-grade overall.
Open the suitcase, there areBosch GO electric screwdriver body, charger, data cable and screwdriver head box with screwdriver head.
It is provided with a charging kit, in which the charger uses USB-A interface and the wire is USB-A to Micro USB wire.
Close up of charger nameplate, supporting 100-240V~50/60Hz 150mA input and 5V1A output, manufactured by Tianbao Electronics Co., Ltd.
The screwdriver head is stored in a special storage box, which can effectively avoid loss. In addition, it is also equipped with a metal extension rod to cope with some deep hole operation scenarios.
Bosch GO electric screwdriver is designed with a lifting rope, so that the product can be hung up when the operation is stopped for the convenience of next use.On both sides of the fuselage are textured black rubber sleeves, giving users a comfortable holding experience.The front is a blue plastic shell, designed with BOSCH brand, sliding switch key and indicator light.
A circular bulge is arranged on the sliding key to increase the friction force and ensure the stable operation of the user.
Under normal startup, the indicator lights green to indicate the battery power.
Bosch GO electric screwdriver parameter nameplate is pasted on the back, and the product has passed CE and EAC certification.
The bottom of the fuselage is sealed with a housing with tamper proof screws.
The bottom is equipped with a torque adjusting turntable, a hidden Micro USB charging interface, and a rubber plug to protect against dust and moisture.
Close up of front output shaft of Bosch GO electric screwdriver.
List of Bosch GO electric screwdriver direct installation bits.
Overview of scenes of adding metal extension rods.
Bosch GO electric screwdriver unpacking
After seeing the unpacking and appearance display of this Bosch electric screwdriver, we will take a look at the internal design and materials.
First, unscrew the fixing screws at the tail of the fuselage, and disassemble the shell. Inside, there are PCBA modules and 18650 lithium batteries.
Continue prying the sealing cover at the front of the engine body.
Inside the sealing cover are fixing clips.
Remove fixing clip and continue disassembly.
Remove the front gasket and spring.
Remove the paddle of forward and reverse rotation and power switch, and continue disassembly.
The inner part of the paddle is fixed with a snap.
Take out the movement from the inside of the handle.
The front end of the core is a reduction box, and the internal part is equipped with a reduction gear.
Planetary reduction gear is set inside the reduction box.
A three-stage metal planetary reduction gear is arranged inside the reduction box.
The reduction gearbox is connected with the front end by welding.
The power takeoff shaft connector is hexagonal.
The rear end of the movement is equipped with a PCB and a motor.
18650 battery is set on the back of PCBA module.
PCBA module and 18650 battery are fixed by plastic bracket.
Close up of the brush motor, with information labels on the side.
The electric screwdriver is equipped with a Samsung 18650 battery. The battery model is INR18650-15Q, the capacity is 1500mAh, the maximum discharge current is 18A, the rated voltage is 3.6V, and the charging limit voltage is 4.2V.
A thermistor is pasted on the side of the battery to detect the temperature of the battery.
At the front of the PCBA module, there is a positive and reverse switch on the left side, a power indicator on the right side, and a torque adjustment turntable on the far right.
The back is soldered with MCU, lithium battery charging chip and Micro USB socket.
The motor is connected by wire welding, and the PCBA module welding switch is used for pressing and starting.
Close up of microswitch used to detect pressing.
Close up of MOS tube and current detection resistance for motor control.
MOS tube used for motor operation control is from Texas Instruments, model CSD17573, NMOS, withstand voltage 30V, conductivity 1.45m Ω, and sealed with SON5 * 6.
The forward and reverse switch is from Defeng, and the contact specification is 10A 4.2V DC.
Close up of three LED power indicators, and equipped with a light shield.
Close up of the turntable used to adjust torque.
The main control MCU is from Zhongying Electronics, model SH79F1615. It is a high-speed and efficient 8051 compatible single chip microcomputer, with 256 byte RAM and two 16 bit timers, integrated with 16K Flash and 2K EEPROM.
A boost chip is from Texas Instruments, which is screen printed CKT. The actual model is TPS61222. The chip has a fixed 5V output and an internal integrated switch tube. It has output overvoltage protection, overheat protection and input voltage lockout protection.
The lithium battery charging chip is from Texas Instruments, silk screen NXE, and the actual model is BQ24040. It is a 1A linear lithium battery charging chip with input overvoltage protection function.
A close-up of the Mirro USB mother seat, corresponding to the solder joints of the torque adjustment turntable, coated with glue for insulation.
Take a look at all of them and have a family photo.
Disassembly summary of charging head network
Bosch GO electric screwdriver is designed with a straight handle. The front end is equipped with a power output shaft. It can be directly installed with a 6.35mm universal screwdriver head or assembled with an extension rod.This electric screwdriver has a built-in lithium battery, which is charged through the Micro USB interface. The kit is equipped with a charger, data cable and a screwdriver head, which can meet the needs of daily use.
The charging head network learned through disassembly that the Bosch GO electric screwdriver is powered by a brush motor, the planetary reduction gears are all metal gears, and the motor also uses metal gears.The screwdriver is equipped with a Samsung 15Q power 18650 battery, which supports 12C discharge. The battery is equipped with a thermistor to detect temperature for overheating protection.
The screwdriver uses Zhongying electronic MCU for the whole machine control and power display. The boost converter, battery charging chip and motor control MOS tube are all from Texas Instruments, and the PCB solder joints are coated with glue to strengthen insulation.The shell is of plastic structure, with rubber anti-skid, and fixed by screws. The internal structure is compact, and the workmanship is solid and reliable.