Crusher Rotor Locking Drive With Self-Locking Worm Gear
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Operators of material processing devices, such as impact crushers, face risks of injury or death due to unwanted rotation of the rotor during maintenance, as traditional methods lack effective control over rotor rotation.
Innovation Solution
A rotor rotation device with a drive mechanism comprising a worm shaft and worm wheel, featuring a coupling mechanism that allows selective engagement with the rotor, enabling controlled rotation and preventing back-driving to prevent unwanted rotor movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the rotor is made accessible for manual rotation during maintenance, then operators can clear blockages and perform maintenance tasks, but the operator is exposed to injury or death from unwanted rotation
Solution Approach 1:
A coupling mechanism acts as an intermediary between the operator and the rotor. This coupling can be selectively engaged or disengaged, allowing the operator to rotate the rotor only when the coupling is engaged. When disengaged, the rotor cannot rotate unexpectedly, protecting the operator while still allowing controlled rotation when needed for maintenance or clearing blockages.
2Object-affected harmful factors
If a locking mechanism is added to prevent unwanted rotor rotation, then operator safety is improved, but device complexity increases
Solution Approach 1:
The coupling mechanism is designed to be self-locking through its mechanical configuration. When engaged, the coupling automatically maintains its locked state without requiring additional power or active control systems. The mechanism uses its own structural features (such as interlocking teeth or friction surfaces) to prevent unwanted rotation, providing safety without adding complex control systems.
3Object-affected harmful factors
If a coupling mechanism is introduced to control rotor rotation, then safety is improved by preventing unwanted rotation, but the ease of operation for maintenance tasks is reduced
Solution Approach 1:
The coupling mechanism transitions between two distinct states: engaged and disengaged. When engaged, it provides rigid mechanical connection for safe controlled rotation. When disengaged, it completely decouples the rotor from driving forces. This dynamic switching capability allows the system to adapt between safety mode and maintenance mode, making the coupling state change simple and rapid.
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 provides controlled, purposeful rotation of the rotor for maintenance while preventing unwanted rotation, thereby enhancing operator safety and facilitating access to difficult-to-reach areas within the material processing device.
Implementation Method 1
the mutual configuration typically comprises a friction angle between a worm of the worm shaft and the worm wheel being larger that a lead angle of the worm
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A rotor rotation device the rotor of a crusher includes a drive mechanism comprising a worm shaft and corresponding worm wheel. The worm wheel can selectively be coupled to said rotor in order to effect controlled rotation of the rotor, e.g. to facilitate maintenance of the crusher. The worm shaft cannot be back-driven by the rotor which allows the drive mechanism to serve as a lock against unwanted or uncontrolled rotation of the rotor.