Spring-Preloaded Shaft Locking for Stable Cutter Stack Clamping
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Solution Overview
Problem
Industrial machines face challenges with shaft flexion and cutter degradation due to uneven load distribution, leading to premature wear and reduced adaptability, as existing clamping systems require precise torque and complex installation procedures, which can result in machine damage and reduced durability.
Innovation Solution
A locking system for industrial machines that includes a lock-ring, spacing plate, compression plate, and spring, allowing for adjustable axial preload on cutter stacks via a bolt torque mechanism, enabling efficient installation and increased adaptability through a polygonal interface for cutter alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If threaded clamping devices are used to reduce cutter play, then cutter stability is improved, but installation and servicing complexity increases
Solution Approach 1:
The patent replaces threaded mechanical clamping devices with a friction-based clamping mechanism. The clamp assembly applies axial force to the cutter stack through friction contact, eliminating the need for threading operations. This substitution maintains cutter stability while dramatically simplifying installation and servicing procedures.
Solution Approach 2:
The invention extracts the threading function from the clamping system entirely. By removing the threaded connection requirement, the system eliminates complex installation procedures while maintaining the essential function of securing cutters to the shaft through friction-based clamping.
2Stability of the object's composition
If precise bolt torque is applied to clamp cutter stack, then cutter stability is improved, but risk of machine damage increases
Solution Approach 1:
The patent replaces torque-dependent bolt clamping with a friction-based clamping system that applies axial force independently of precise torque control. This eliminates the risk of over-torquing causing shaft shoulder deformation or bolt deformation while maintaining effective cutter clamping through friction contact.
Solution Approach 2:
The invention changes the clamping mechanism from torque-controlled to friction-force-controlled. By transitioning from rotational torque application to axial friction force application, the system eliminates the harmful effects of improper torque while maintaining stable cutter clamping through controlled friction forces.
3Object-affected harmful factors
If under-torqueing is applied to cutter stack, then machine damage is prevented, but axial stack play increases
Solution Approach 1:
The patent replaces torque-based clamping with friction-based clamping that directly applies axial force to the cutter stack. This substitution ensures adequate clamping force without the risk of under-torquing, as the friction mechanism naturally maintains sufficient axial force to prevent stack play while avoiding machine damage.
Solution Approach 2:
The friction-based clamping system self-regulates to provide adequate axial clamping force without requiring precise operator input. The friction mechanism inherently maintains sufficient force to prevent axial play while avoiding excessive force that could cause damage, eliminating the under-torqueing problem.
4Strength
If welded cutter-shaft interface is used to increase strength, then cutter load carrying capacity is improved, but reducer adaptability decreases
Solution Approach 1:
The patent replaces welded mechanical connection with a friction-based clamping system. This substitution maintains strong load carrying capacity through friction forces while enabling easy cutter replacement and machine reconfiguration, thereby preserving adaptability that welding eliminates.
Solution Approach 2:
The invention changes the connection method from permanent welding to reversible friction clamping. This parameter change maintains the necessary strength for load carrying through controlled friction forces while restoring adaptability by allowing easy cutter removal and reconfiguration.
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 locking system reduces the likelihood of improper installation, enhances machine durability, and increases adaptability by allowing for precise control of cutter stack preloading and easy installation, while preventing unwanted axial movement and wear.
Implementation Method 1
a spring axially interposed between a spring retainer spacing plate and the compression plate. When installed, the locking system exerts an axial preload on a cutter stack mounted on the rotational shaft.
Data Source
AI summary
A locking system in an industrial machine is provided. The locking system includes a lock-ring positioned in a lock-ring recess in a rotational shaft, a spacing plate axially interfacing with the lock-ring, and a compression plate with a threaded opening. The locking system further includes a bolt threadingly engaged with the threaded opening in the compression plate and a spring axially interposed between the spacing plate and the compression plate.