Impact Drill Torque Adjustment Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing impact drills have complex and large torque adjustment devices, which hinder size reduction and are prone to malfunction due to unreliability.
Innovation Solution
The impact drill incorporates a transmission assembly with a locking ring, lock pins, a biasing element, and a function conversion member to simplify the torque adjustment mechanism, allowing for size reduction and improved reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complex torque adjustment device is used, then torque adjustment functionality is achieved, but device size increases and reliability decreases
Solution Approach 1:
The patent merges the torque adjustment function with the transmission assembly by integrating the locking ring, lock pins, and biasing element directly into the existing transmission structure. This combination eliminates separate torque adjustment components, achieving torque variability while maintaining compact drill dimensions and improving reliability through reduced part count.
Solution Approach 2:
The locking ring serves multiple functions: it transmits power from the planet gear, provides torque adjustment through selective locking, and enables different operating modes (driving, impact, hole expansion). This multi-functionality reduces the need for separate mechanisms, thereby reducing overall device size while maintaining versatility.
2Adaptability or versatility
If a complex torque adjustment device is used, then torque adjustment functionality is achieved, but the structure becomes unreliable and prone to malfunction
Solution Approach 1:
The biasing element automatically pushes the lock pins against the locking ring, creating a self-actuating torque adjustment mechanism. The system uses the existing rotational motion and spring force to engage/disengage locking positions without requiring additional actuators or complex control systems, thereby improving reliability through simplicity and self-regulation.
Solution Approach 2:
By integrating the torque adjustment mechanism into the transmission assembly, the patent reduces the number of independent components that could potentially fail. The combined structure shares common parts and mounting points, reducing connection interfaces and potential failure points while improving overall system reliability.
3Adaptability or versatility
If traditional torque adjustment structure is used, then torque control is achieved, but device complexity increases
Solution Approach 1:
The torque adjustment mechanism is segmented into discrete functional elements: the locking ring with circumferential positions, multiple lock pins, and a biasing element. This segmentation allows for simple geometric features (teeth, grooves, slots) rather than complex continuous adjustment mechanisms, reducing overall structural complexity while maintaining torque control capability.
Solution Approach 2:
The lock pins act as intermediaries between the rotating locking ring and the stationary transmission components. This intermediary mechanism translates rotational position into axial locking force, providing a simple geometric solution for torque control without requiring complex adjustment mechanisms or multiple moving parts.
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 solution enables efficient torque adjustment, reduces the overall size of the impact drill, and enhances the reliability of the torque adjustment mechanism, addressing the limitations of existing technologies.
Implementation Method 1
a biasing element, configured to bias the lock pin such that the lock pin applies a locking force to stop the rotation of the locking ring
Data Source
AI summary
An impact drill includes a lock pin, a biasing element, a function conversion member and an operation member. The lock pin is connected to the locking ring. The biasing element is connected to the lock pin and provides a biasing force that causes the lock pin to press against the locking ring. The function conversion member includes a stop portion configured to stop the movement of the lock pin along the first axis and a release portion configured to allow the movement of the lock pin along the first axis. The operation member is connected to the function conversion member. The operation member is configured to drive the function conversion member to rotate around the first axis to switch the stop state of the movement of the lock pin along the first axis.