Reinforcing Bar Binding Machine Brake Actuating Unit
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Solution Overview
Problem
Conventional reinforcing bar binding machines face issues with durability due to repeated inputs causing wear on braking components, increased noise, and excessive power consumption from spring-loaded braking mechanisms, which also affect the twisting mechanism's operation.
Innovation Solution
A reinforcing bar binding machine that uses a brake actuating unit powered by the twist motor to brake the wire reel only at specific timings, releasing the braking when the wire reel stops, allowing most of the twisting mechanism's operation to occur without braking, thereby reducing repetitive input and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the braking means is actuated by repeated inputs synchronized with the rotation of the twist motor, then the wire reel can be stopped during feeding, but the contact portion is damaged or worn due to repeated inputs, reducing durability
Solution Approach 1:
The brake actuating unit is designed to operate periodically only during wire feeding operations, rather than continuously during twisting. The brake is activated when the feed motor feeds the wire and deactivated when the twist motor performs twisting, creating a periodic action pattern that matches the operational requirements while minimizing wear on the contact portion.
2Reliability
If the braking means is actuated by repeated inputs synchronized with the rotation of the twist motor, then the wire reel can be stopped during feeding, but operating noise occurs due to repeated inputs
Solution Approach 1:
The brake actuating unit operates periodically only during wire feeding operations, creating intermittent rather than continuous braking action. This periodic operation reduces the frequency of brake engagement and disengagement, thereby minimizing operating noise while maintaining effective control of wire reel rotation when needed.
3Reliability
If a spring load for actuating the braking means is always operated to the twisting mechanism, then the wire reel can be braked during feeding, but the power consumption of the twist motor is increased
Solution Approach 1:
The brake actuating unit transitions from a static, continuously engaged spring-loaded brake to a dynamic system that engages and disengages the brake based on operational phase. During wire feeding, the brake is engaged to control wire reel rotation; during twisting operations, the brake is disengaged to eliminate unnecessary spring load resistance, thereby reducing power consumption while maintaining braking functionality when required.
4Reliability
If a spring load for actuating the braking means is always operated to the twisting mechanism, then the wire reel can be braked during feeding, but the spring load is varied in accordance with the actuating position of the twisting mechanism, adversely affecting the actuation of the twisting mechanism
Solution Approach 1:
The brake actuating unit dynamically adjusts the engagement state of the brake based on the operational phase. During twisting operations, the brake is completely disengaged, eliminating variable spring load interference that would otherwise complicate the actuation of the twisting mechanism. This dynamic separation ensures that braking and twisting operations do not interfere with each other, improving ease of 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 enhances durability and reduces noise and power consumption by minimizing repetitive braking inputs and optimizing the braking operation's influence on the twisting mechanism, ensuring efficient and accurate binding.
Implementation Method 1
a brake actuating unit actuated by using the twist motor as a power source... Before completing the binding, the brake actuating unit brakes the wire reel to stop a rotation of the wire reel
Data Source
AI summary
A reinforcing bar binding machine includes a wire reel which is supported on a binding machine main body, a feed motor which drives the wire reel, a twisting mechanism which twists and binds a wire, a twist motor which drives the twisting mechanism and a brake actuating unit which is actuated by the twist motor. The twist motor starts a normal rotation when the wire is fed by a predetermined amount. The twisting mechanism twists the wire to complete the binding after the twisting mechanism is advanced to a predetermined position by the normal rotation. The twist motor starts a reverse rotation after completing the binding, and the twisting mechanism is retracted to a stand-by position by the reverse rotation. Before completing the binding, the brake actuating unit brakes the wire reel to stop the wire reel and releases the braking with respect to the wire reel.