Trunk Sawing Machine Safety Brake for Fast Disc Stop
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing trunk sawing machines face safety risks due to the potential for operator injury from rotating saw discs and suffer from transmission belt wear during emergency stops, as previous safety systems are complex and ineffective.
Innovation Solution
A safety device with a manually actuated belt tightener and band brake allows for quick and safe stoppage of the saw disc without wearing out the transmission components, using a lever to tension or release the belt and a rotating element for friction braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If braking means act directly on the belt of the transmission to stop the saw disc, then the saw disc can be stopped quickly, but the belt wears out and transmission reliability deteriorates
Solution Approach 1:
A friction disc is introduced as an intermediary component between the driving shaft and the belt transmission system. The brake acts on this friction disc rather than directly on the belt, allowing kinetic energy to be dissipated through friction without damaging the transmission belt. This mediator protects the belt from wear while still enabling effective braking of the saw disc.
Solution Approach 2:
The braking function is extracted from the transmission belt system and separated into an independent friction disc braking mechanism. This allows the belt transmission to remain intact and undamaged while the braking operation is performed on a dedicated component (the friction disc) that is designed to withstand brake wear.
2Object-affected harmful factors
If a band brake acts on a non-rotating pulley to stop the belt, then the saw disc can be stopped, but the system becomes complex and potentially dangerous
Solution Approach 1:
The friction disc serves as a mediator between the brake mechanism and the driving shaft. Instead of having the brake act on a non-rotating pulley or the belt, it acts on this rotating friction disc that is directly connected to the driving shaft, simplifying the braking system while maintaining safety.
Solution Approach 2:
The complex band brake system acting on a non-rotating pulley is replaced with a simpler friction brake system acting on a rotating friction disc. This substitution reduces mechanical complexity while improving reliability and safety.
3Reliability
If a belt tightener is used to disengage propeller shafts, then motion transmission can be interrupted, but the lever system becomes complex and the brake function is poorly functional
Solution Approach 1:
The belt tightener and brake actuation functions are merged into a single integrated mechanism. The same lever that controls the belt tightener also actuates the brake on the friction disc, reducing the number of separate control systems while maintaining both functions effectively.
Solution Approach 2:
The lever system is designed to perform multiple functions: it controls both the belt tightener for disengaging shafts and the brake for stopping the saw disc. This multi-functional design reduces overall system complexity while maintaining reliable motion transmission control.
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
Enables rapid and safe stoppage of the saw disc with minimal wear on critical transmission components, enhancing operator safety and extending the life of the machine.
Implementation Method 1
a band brake that can be actuated by means of the aforementioned lever... acts on a rotating element on which the band brake... acts
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Trunk sawing machine with rotary saw disc (3) comprising a manually actuatable safety device for disengaging the driven shaft (4) for the actuation of the saw disc from the motor-driven driving shaft (5) and simultaneously braking the disc (3).