Mower Blade Mounting Structure with Sliding Locking Mechanism
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Solution Overview
Problem
Conventional mowing blade replacement on mowing machines is difficult due to the use of bolts and nuts, requiring special tools and posing challenges during maintenance.
Innovation Solution
A mount/dismount structure featuring a fitting trench on the mowing machine's stay with a locking portion that allows the mowing blade to be securely fitted and rotated, using a sliding mechanism without the need for special tools, with a configuration that prevents easy dismounting and includes a shaft portion that changes width to ensure secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bolts and nuts are used to fasten the mowing blade to the stay, then the blade is securely attached, but the blade becomes difficult to replace and requires special tools for maintenance
Solution Approach 1:
The attachment structure is divided into separate functional components: a locking portion with head, shaft, and seat sections, and a fitting trench with distinct mount/dismount and fixing portions. This segmentation allows the blade to be securely attached during operation while enabling easy release when needed, eliminating the need for tools.
Solution Approach 2:
The locking portion is designed to be dynamically adjustable between two states: a locked state where the shaft engages the fixing portion for secure attachment, and an unlocked state where the head can be inserted into or removed from the mount/dismount portion. This dynamic capability enables tool-free blade replacement while maintaining operational security.
2Ease of operation
If a simple mounting structure is used, then blade replacement is easy, but the blade may accidentally dismount during operation
Solution Approach 1:
The locking portion and fitting trench are designed with asymmetric geometries that permit insertion in only one direction. The head portion can be inserted into the mount/dismount portion, but the shaft cannot pass through the fixing portion during rotation, preventing accidental dismounting while allowing intentional removal.
Solution Approach 2:
The shaft portion acts as an intermediary element between the head and seat portions, physically blocking the path between the mount/dismount portion and fixing portion. This intermediary structure ensures that once locked, the blade cannot accidentally disengage during operation.
3Ease of repair
If the locking portion is easily removable, then maintenance is simple, but the blade may detach during normal operation
Solution Approach 1:
The mount/dismount portion is designed with a wide opening that allows the head portion to be easily inserted during maintenance, but the subsequent rotation of the shaft creates a blocking action that prevents removal during operation. This preliminary easy insertion followed by automatic locking provides both maintenance simplicity and operational reliability.
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 simple and secure mounting and dismounting of the mowing blade without tools, preventing accidental dismounting during operation and ensuring the blade remains attached due to centrifugal force and directional control, facilitating easy replacement and maintenance.
Implementation Method 1
The shaft portion that may be pierced through the fitting trench can have a shaft width changed relative to the fitting trench by rotating the shaft portion
Implementation Method 2
ensuring the blade remains attached due to centrifugal force and directional control
Data Source
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AI summary
[Object] The invention provides a mount/dismount structure of a mowing blade of a mowing machine that achieves simple and secure fitting of the mowing blade fitted to a front end of a stay, without requiring a particular tool. [Solving means] The invention is a mount/dismount structure of a mowing blade that is fitted to a front end of a rotary stay of a crass mower. A fitting trench 6 of a mowing blade 5 is formed on a head portion of a stay 1. The mowing blade 5 is rotatably fitted to the fitting trench 6 via a locking portion 10. The fitting trench 6 has a mount/dismount portion 7 of the locking portion 10, and a fixing portion 9 of the locking portion 10. The locking portion 10 is inserted from the mount/dismount portion 7, and the mowing blade 5 is fitted by sliding the locking portion 10 to the fixing portion 9 along the fitting trench 6. The mount/dismount portion 7 is set at a base side of the stay, and the fixing portion 9 is set at a front end side of the stay.