Wireless Motor Driver Torque via Planetary Gear
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Solution Overview
Problem
Wireless small motor drivers have limitations due to low torque and limited number of revolutions, restricted mobility, and short operating time due to power constraints, making them unsuitable for medium or large devices and posing safety concerns at night.
Innovation Solution
A wireless small motor driver with a rotation reduction gear that increases torque and number of revolutions, includes a multi-socket for interchangeable driver bits, a rechargeable battery with USB charging, and an integrated illumination lamp for enhanced safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a rotation reduction gear is added to increase torque, then the torque increases, but the device complexity increases
Solution Approach 1:
The patent implements a planetary gear mechanism where gears are nested within each other - a sun gear at the center, planetary gears surrounding it, and a ring gear enclosing the planetary gears. This nested configuration achieves high torque multiplication (gear ratio of 3:1 or higher) while maintaining a compact structure that does not significantly increase the overall device volume or complexity.
2Speed
If the motor is designed for high speed revolutions, then the number of revolutions increases, but the torque decreases
Solution Approach 1:
The planetary gear mechanism nested within the motor structure enables the system to achieve both high speed input from the motor and high torque output. The sun gear receives high-speed rotation from the motor, and through the planetary gear arrangement, transforms it into lower-speed, high-torque rotation at the output shaft, effectively resolving the speed-torque tradeoff.
Solution Approach 2:
The patent changes the rotational parameters through the gear mechanism - converting high-speed, low-torque motor rotation into low-speed, high-torque output rotation. The gear ratio of 3:1 or higher provides a parameter transformation that simultaneously achieves the desired number of revolutions and torque levels.
3Ease of operation
If a rechargeable battery is used to enable wireless operation, then the mobility increases, but the operating time decreases
Solution Approach 1:
The patent incorporates a rechargeable battery that can be charged in advance using a USB interface, allowing the device to be prepared for extended operation periods. The battery stores energy beforehand, enabling the motor driver to operate wirelessly for longer durations without requiring a power outlet during actual use.
4Ease of operation
If the motor driver is used as a gun type driver, then the tightening operation is convenient, but the spatial limitation increases
Solution Approach 1:
The patent transforms the static, fixed-orientation gun type driver into a more dynamic system by adding a flexible cable connection between the motor driver and the driver bit. This dynamic connection allows the driver bit to reach various spatial positions and angles while the motor driver body can remain in a convenient position for the operator, effectively resolving the spatial limitation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The motor driver can efficiently tighten bolts and nuts of various sizes, operates without a 220V or 110V receptacle, and ensures worker safety at night with extended battery life and improved precision.
Implementation Method 1
a battery for supplying uniform power to the motor
Implementation Method 2
a rotation reduction gear coupled to the motor, the rotation reduction gear transmitting rotary force to the socket and increasing a torque
Data Source
AI summary
A wireless small motor driver, in which power consumption is decreased by adjusting a gear ratio, the efficiency of an operation is increased due to a high torque, and the safety of a worker at night is ensured using an illumination lamp. The wireless small motor driver includes a driver case inside of which a motor is provided. A driver bit has a predetermined length in a bilateral direction, the driver bit being replaceable, with one or both ends thereof conforming to the shape of a bolt, and has a fixing projection. A socket is coupled to an end portion of the driver case, the driver bit being fastened to the socket. A rotation reduction gear is coupled to the motor, the rotation reduction gear transmitting rotary force to the socket and increasing a torque. A USB and a battery for supplying uniform power to the motor are added.