Blade Change Carrier Device with Spring-Loaded Locking Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing blade carriers for rotary driven devices, such as lawn mowers, are not designed to facilitate easy and rapid blade changes without requiring specialized tools, strength, or extensive training, and lack a sturdy locking mechanism that can withstand the rigors of the rotary blade environment.
Innovation Solution
A blade carrier device with a housing having a bottom and false floor forming a channel, a housed blade-lock member with a downstanding tip biased by a compression spring, and a lever port for easy blade insertion and removal, allowing the blade-lock member to be raised or lowered to secure or release the blade, linked to a rotary drive shaft for rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sturdy locking mechanism is used to secure the blade during rotation, then reliability and strength are improved, but the complexity of the device increases
Solution Approach 1:
The blade-lock member is designed as a movable component that can transition between a lowered position (locking) and a raised position (unlocking). The compression spring provides dynamic biasing force to maintain the locking position, while the lever mechanism allows easy transition to the unlocking position for blade removal. This dynamic design enables reliable blade securing during operation while simplifying the overall structure compared to static multi-component locking systems.
Solution Approach 2:
The compression spring automatically biases the blade-lock member to the lowered locking position without requiring external power or complex control systems. The spring's elastic force continuously maintains the locking engagement, providing self-regulating securement that reduces the need for additional actuators or control mechanisms, thereby reducing device complexity while maintaining reliability.
2Ease of operation
If a simple blade removal mechanism is used, then ease of operation is improved, but the strength and durability of the carrier decreases
Solution Approach 1:
The lever port and lever mechanism provide a simple, tool-based unlocking action that requires minimal force and no specialized tools. The lever pivots on a fulcrum to mechanically advantage the compression spring, easily raising the blade-lock member to the unlocking position. This simple dynamic mechanism maintains carrier strength by using efficient lever mechanics rather than requiring complex multi-stage release systems.
Solution Approach 2:
The lever acts as an intermediary mechanism between the user's manual input and the compression spring's locking force. By inserting a lever through the lever port and pivoting it on the fulcrum, the user can easily overcome the spring's biasing force to unlock the blade. This intermediary lever mechanism simplifies operation while maintaining structural integrity, as it uses basic lever physics rather than requiring complex electronic or hydraulic systems.
3Strength
If specialized tools and training are required for blade changes, then the locking mechanism strength is improved, but the ease of operation deteriorates
Solution Approach 1:
The compression spring provides automatic, continuous biasing force to maintain the locked position without requiring external power sources, complex controls, or specialized knowledge. The system self-regulates the locking engagement through the spring's elastic properties, eliminating the need for electronic controls, hydraulic systems, or specialized training to understand the locking mechanism's operation.
Solution Approach 2:
The lever port serves as an accessible intermediary interface that allows users to easily interact with the locking mechanism using simple lever tools. The lever pivots on a exposed fulcrum, providing intuitive mechanical advantage to overcome the spring's locking force. This design eliminates the need for specialized tools or training, as the lever mechanism mirrors basic physics principles that users can easily understand and apply.
4Stability of the object's composition
If a complex blade changing procedure is used, then the structural integrity during rotation is improved, but the time required for blade changes increases
Solution Approach 1:
The blade-lock member transitions quickly between locked and unlocked states through the lever mechanism's simple pivoting motion. The compression spring rapidly returns the member to the locked position after release, enabling fast blade changes. This dynamic quick-transition design maintains stable blade attachment during operation while significantly reducing the time required for blade replacement compared to multi-step locking procedures.
Solution Approach 2:
The compression spring is pre-loaded to provide continuous biasing force that maintains the locked position before any blade change operation. This preliminary action ensures the blade is securely locked during normal operation, and the spring's pre-positioned energy enables rapid unlocking when the lever is actuated, reducing blade change time while maintaining structural integrity.
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 quick and secure blade changes without specialized tools or training, ensuring durability and ease of operation, while maintaining structural integrity during blade rotation.
Implementation Method 1
a housed compression spring biasing the blade-engaging tip through an opening in the housing's false floor and through a center hole in the blade to lock it within the channel
Data Source
AI summary
The invention is essentially a quick-change blade carrier for a blade mounted to a rotary drive shaft (such as on a mower) has an internally threaded bore. The carrier includes a housing linked by its cap to the rotary drive shaft, and enclosing a blade-locking member having a blade-locking tip downstanding from its underside; the device also includes a locking means (such as a compression spring) to bias the blade-locking member (and tip) downward through a center hole in the blade held within a channel in the bottom of the housing.