Auto Strapping Tool Inner Module Structure
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Solution Overview
Problem
Conventional auto strapping packaging tools have complex internal structures, leading to durability issues, unbalanced weight distribution, increased manufacturing costs, and reduced usability due to the use of cylindrical BLDC motors and complex component layouts.
Innovation Solution
The inner module structure of the auto strapping packaging tool is redesigned with dedicated flat motors for each module, allowing for individual control of tension and welding modules, which minimizes weight imbalance and simplifies assembly, improving user convenience and reducing manufacturing costs by forming components in units of modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a conventional cylindrical BLDC motor is used in the strapping packaging tool, then the motor can provide the necessary driving power, but the internal structure becomes complex and high vibration is transmitted to other apparatuses during welding, affecting durability
Solution Approach 1:
The patent replaces the conventional cylindrical BLDC motor with a piezoelectric actuator that utilizes piezoelectric expansion and contraction to generate linear motion. This substitution eliminates complex mechanical components such as gears, belts, and cylindrical motor structures, while reducing vibration during welding operations. The piezoelectric actuator directly converts electrical energy to mechanical motion, simplifying the internal structure while maintaining driving power.
2Power
If a long cylindrical BLDC motor is used, then the motor can provide sufficient power, but the layout of components is limited and unbalance occurs in overall weight distribution, reducing usability
Solution Approach 1:
The patent divides the tool into separate modular components, with the piezoelectric actuator serving as an independent module. This segmentation allows for flexible arrangement of components and balanced weight distribution, improving ergonomics and usability. The actuator module can be positioned optimally without being constrained by the layout requirements of a long cylindrical motor.
3Reliability
If a complex structure is used to achieve the welding function, then the welding process can be performed, but the manufacturing cost increases and it becomes difficult to deal with problems, increasing purchase and maintenance costs
Solution Approach 1:
The patent extracts the welding function from the complex mechanical system and implements it using a piezoelectric actuator that generates high-frequency vibrations. This extraction simplifies the overall structure, reducing the number of components that need to be manufactured and assembled. The piezoelectric actuator integrates the welding function directly into the gripping mechanism, eliminating separate welding components and reducing manufacturing complexity.
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
This design enhances productivity, assembly efficiency, and cost competitiveness by enabling automatic assembly, reducing manufacturing costs, and improving weight distribution, thus enhancing the overall usability and durability of the packaging tool.
Implementation Method 1
a piezoelectric actuator which expands or contracts according to application of voltage
Implementation Method 2
the bonding is mainly performed by using friction heat generated by vibrating the plastic band in a state in which the plastic band is pressed
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided is an inner module structure of an auto strapping packaging tool including a tension module in which first power generated by a first dedicated motor disposed at a rear side is transmitted to a front side to provide a tensile force to a packaging plastic band, and a welding module which is disposed at one side of the tension module, and in which a gripper unit is opened or closed by second-1 power due to axial rotation in a forward direction of a second dedicated motor disposed at a rear side, and the gripper unit linearly reciprocates by second-2 power due to axial rotation in a reverse direction of the second dedicated motor to provide a friction force to the plastic band to which the tensile force is applied through the tension module.