Packing Machine Core Gear and Cam Mechanism
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Solution Overview
Problem
Previous packing machine cores are unstable in strapping force, complex in structure, and prone to faults due to gear engagement and suction tube/inductive switch control, leading to inefficiencies in strap feeding, returning, and tightening.
Innovation Solution
A machine core design utilizing a gear reduction transmission system with coaxial rollers, a swing system with reset and regulating springs, and a control mechanism with cams and inductive sensors to regulate strap tension and movement, simplifying the structure and reducing failure rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If gear engagement and suction tube with inductive switch are used to control tightening, then strap feeding and returning can be achieved, but the structure becomes complex and fault points increase
Solution Approach 1:
The patent removes the suction tube and inductive switch from the system, replacing them with a cam mechanism that directly controls the second roller's movement. This extraction of unnecessary components simplifies the structure and reduces fault points while maintaining the strap feeding and returning functions.
Solution Approach 2:
The patent replaces the complex combination of suction tube, inductive switch, and gear engagement with a purely mechanical cam mechanism. The cam's profile directly controls the second roller's position and movement, providing a simpler and more reliable mechanical system for strap feeding and returning.
2Ease of operation
If traditional control mechanisms are used, then strap tightening can be achieved, but strapping force becomes unstable
Solution Approach 1:
The patent employs a dynamic cam mechanism where the cam profile is specifically designed to control the second roller's movement throughout the packing cycle. This dynamic control ensures stable strapping force by maintaining proper roller engagement and tension throughout the tightening process, replacing static or less precise control mechanisms.
3Extent of automation
If multiple components like suction tube and inductive switch are used, then control functions can be achieved, but the number of fault points increases
Solution Approach 1:
The patent extracts and removes the suction tube and inductive switch components entirely, replacing their control functions with a mechanical cam mechanism. This reduction in component count directly decreases the number of potential fault points while maintaining full automation of the control functions through the cam-driven second roller movement.
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 achieves stable strap feeding, returning, and tightening with reduced failure rates, allowing for precise regulation of strapping force, feeding length, and ironing adhering delay, enhancing the packing process efficiency.
Implementation Method 1
the swing system having a reset spring, a regulating spring and a stretched spring
Implementation Method 2
The machine core spindle is provided with a plurality of cams for controlling the ironing adhering and strap cutting mechanism
Implementation Method 3
a first inductor matching with the first inductive cam and a second inductor matching with the strap tightening cam; signal generated by matching of the first inductive cam with the first inductor
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A machine core of a packing machine, a strap feeding and returning and strap tightening device thereof includes a first roller (1) and a second roller (2). The second roller (2) is controlled by a control mechanism to move to a first matching state with the first roller (1) and to move out of the first matching state with the first roller (1) to a second matching state. The first roller (1) is connected with a first transmission gear (10) capable of driving the first roller (1) to rotate. The second roller (2) is connected with a second transmission gear (20) capable of driving the second roller (2) to rotate. The second transmission gear (20) and the second roller (2) conduct synchronous movement. The first transmission gear (10) takes in power through a gear transmission mechanism to drive the first roller (1) to rotate. The second transmission gear (20) takes in power through the gear transmission mechanism. The second transmission gear (20) moves into a first gear matching state with a gear transmitting the power to the second transmission gear (20) through the movement, and moves out of the first gear matching state. The machine core has a simple structure, is capable of reducing failure rate, and has a good packing effect. Besides, strapping force, strap feeding length and temperature as well as ironing adhering delay may be regulated by means of a potentiometer.