Track Impact Wrench Handle Decoupling for Vibration Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electrically operated impact wrenches used for tightening and loosening nuts and screws on tracks are strenuous for operators due to high torques and forces, leading to discomfort and potential vibration-related issues.
Innovation Solution
Incorporation of a vibration decoupling device with elastomeric vibration dampers to separate the handle from the impact screwing mechanism, ensuring that vibrations and forces are damped, allowing the handle to be held with both hands and reducing hand-arm vibrations to below 5 m/s2, with the rechargeable battery acting as a counterweight for further damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the impact wrench is designed to deliver high torques for tightening and loosening nuts and screws, then the tightening and loosening function is improved, but the vibration and forces acting on the operator increase, reducing operating comfort
Solution Approach 1:
The impact wrench is divided into two separate sides by a decoupling plane: the working side containing the impact screwing mechanism and electric drive motor, and the operator side containing the handle and control elements. This segmentation isolates the vibration-generating components from the operator interface, allowing high torque output while reducing vibration transmission to the operator's hands.
Solution Approach 2:
A vibration decoupling device acts as an intermediary between the working side and operator side. This device includes at least one vibration damper made of elastomeric material that mechanically connects the two sides while filtering and damping vibrations, thereby protecting the operator from excessive hand-arm vibrations while maintaining the structural integrity and power transmission of the tool.
2Reliability
If the handle is directly connected to the impact screwing mechanism for mechanical strength, then the structural reliability is improved, but the vibration transmission to the operator increases, reducing operating comfort
Solution Approach 1:
The vibration decoupling device serves as an intermediary mechanical connection between the handle and the impact screwing mechanism. It maintains the structural reliability needed for high-torque applications while simultaneously attenuating harmful vibrations through the use of elastomeric vibration dampers that absorb and dissipate vibrational energy.
Solution Approach 2:
The vibration decoupling device changes the mechanical parameters of the connection between the handle and the impact screwing mechanism. By introducing elastomeric materials with specific damping properties, the system transforms the rigid mechanical connection into a compliant one that filters vibration frequencies while maintaining sufficient structural strength for reliable operation.
3Device complexity
If the electric drive motor is positioned close to the impact screwing mechanism for compact design, then the device complexity is reduced, but the vibration and forces transmitted to the handle increase, reducing operating comfort
Solution Approach 1:
The compact arrangement of the electric drive motor and impact screwing mechanism on the working side is segmented from the operator side by the decoupling plane. This allows the motor to be positioned close to the screwing mechanism for mechanical efficiency and compact design, while the vibration decoupling device prevents these vibrations from reaching the handle, thus maintaining both simplicity and operator comfort.
4Object-affected harmful factors
If the rechargeable battery is positioned on the operator side for counterweight effect, then the vibration damping is improved, but the weight distribution changes, potentially affecting balance
Solution Approach 1:
The rechargeable battery is strategically positioned on the operator side of the decoupling plane to function as a counterweight. This placement not only balances the overall weight distribution of the impact wrench but also enhances vibration damping by creating a counterbalancing effect that reduces the net vibration transmitted to the operator's hands during operation.
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 provides enhanced operating comfort and reliability by effectively damping vibrations and forces, protecting the control device and allowing easy battery replacement, while maintaining a simple and reliable mechanical connection.
Implementation Method 1
a vibration decoupling device for vibration decoupling of the at least one handle and of the impact screwing mechanism
Implementation Method 2
The at least one vibration damper preferably comprises an elastomeric material, in particular a rubber material
Implementation Method 3
the rechargeable battery acting as a counterweight for further damping
Data Source
AI summary
An impact wrench for tightening and loosening nuts and screws on a track has a vibration decoupling device which serves for vibration decoupling of at least one handle from an electrically operated impact screwing mechanism.