Mobile Strapping Device Single Motor Tensioning Friction Welding
Solution Overview
Problem
Existing mobile strapping devices for packaging goods are heavy, voluminous, and have poor handling properties due to their complex automation and large number of components, which affects functional reliability and ease of operation.
Innovation Solution
A mobile strapping device equipped with a planetary gear system and a brushless direct current motor, which provides a compact and lightweight design with high torque capabilities, allowing for efficient strap tensioning and friction welding without the need for external energy sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automation is increased to improve productivity, then strapping operations become more automated, but device complexity and weight increase
Solution Approach 1:
The patent combines multiple functions (tensioning, friction welding, and oscillating movement) into a single integrated drive system. The friction welder is equipped with a single motor that simultaneously performs tensioning and friction welding operations, eliminating the need for separate motors and reducing overall device complexity while maintaining automation.
Solution Approach 2:
The single motor in the friction welder is designed to perform multiple functions: it provides oscillating movement for friction welding, applies tension to the strap, and controls the welding process. This multi-functional design reduces the number of components needed while improving automation efficiency.
2Adaptability or versatility
If multiple motors are used to improve functional capability, then tensioning and welding can be performed independently, but weight and volume increase
Solution Approach 1:
The patent merges the tensioning function and friction welding function into a single motor-driven system. The friction welder's single motor controls both the oscillating movement for welding and the tensioning operation, reducing the number of motors from multiple to one, thereby reducing weight while maintaining the ability to perform both functions independently through control sequencing.
3Weight of moving object
If a single motor is used to reduce weight, then device weight decreases, but the ability to perform both tensioning and welding simultaneously is limited
Solution Approach 1:
The single motor in the friction welder is designed to continuously perform useful work by sequentially executing tensioning and friction welding operations without interruption. The motor maintains continuous rotation, first applying tension to the strap and then transitioning to oscillating movement for friction welding, ensuring continuous productive action without the need for multiple motors.
Solution Approach 2:
The single motor employs periodic oscillating movement during the friction welding phase, alternating between compression and tension forces to create the necessary friction heat. This periodic action allows the single motor to perform functions that would traditionally require multiple continuous motors, maintaining productivity while reducing weight.
4Reliability
If complex automation systems are implemented to improve strapping quality, then functional reliability improves, but handling properties deteriorate
Solution Approach 1:
The patent merges multiple control functions into a single motor control system that maintains consistent strapping quality through integrated control. By combining tensioning and friction welding control in one motor, the system reduces the complexity of multiple independent control systems while maintaining reliable strapping quality through coordinated single-motor control sequences.
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 device achieves high functional reliability and improved handling properties by using a single drive for both tensioning and friction welding, enabling efficient strapping of packaged goods with reduced risk of damage and extended battery life.
Implementation Method 1
a friction welder for producing a friction weld connection at two areas of the loop of wrapping strap disposed one on top of the other
Implementation Method 2
a chargeable energy storage means for storing energy that can be released as drive energy at least for the friction welder for producing a friction weld connection
Data Source
AI summary
A strapping device including a tensioner operable to apply a strap tension to a loop of wrapping strap, a friction welder operable to produce a friction weld connection at two areas of the loop of wrapping strap disposed one on top of the other, a motor operable in a first rotational direction to drive the tensioner and in a second opposite rotational direction to drive the friction welder, and a control device. The control device is configured to, in response to receiving a first designated input: (1) operate the motor in the first rotational direction to drive the tensioner until a predetermined strap tension is reached in the loop of wrapping strap; and (2) afterwards, automatically operate the motor in the second different rotational direction to drive the friction welder to produce the friction weld connection.