Protective Casing Movable Lever Coupling Splined Yoke
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Solution Overview
Problem
Existing coupling spline yoke assemblies require significant user effort for coupling and uncoupling, and lack effective protection against axial movements, leading to ergonomic and operational inefficiencies.
Innovation Solution
A protective casing with a movable lever and safety pin, featuring a triangular shape with rounded corners and a spring mechanism, allows for minimal force usage in moving the safety pin, providing secure axial movement protection and easy mounting/dismounting of the transmission shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional protective casing with a rotating sleeve is used for coupling, then the coupling mechanism is protected, but the user must rotate the sleeve for approximately 45° which requires significant effort and reduces ease of operation
Solution Approach 1:
The safety pin is designed to move dynamically between two positions (engaged and disengaged) rather than requiring rotational movement. The lever mechanism converts small linear forces into the necessary movement to overcome spring force and move the pin, significantly reducing user effort compared to rotating a sleeve 45°.
Solution Approach 2:
The lever acts as an intermediary mechanism between the user's hand and the safety pin. Instead of directly moving the pin or rotating a sleeve, the user applies force to the lever, which then translates this force through its pivot point to move the safety pin with minimal effort required from the user.
2Reliability
If a safety pin with spring is used to prevent axial movements, then the transmission shaft is protected against axial movements, but the construction becomes more complex and requires more parts
Solution Approach 1:
The safety pin, spring, and lever are integrated into a single compact assembly within the protective casing. The lever is pivotally connected to the casing and works in conjunction with the spring-loaded pin, merging multiple protective functions into one unified mechanism rather than separate components.
Solution Approach 2:
The lever serves multiple functions: it acts as a handle for user operation, a mechanical advantage multiplier to overcome spring force, and a connector between the user's input force and the safety pin movement. The spring both prevents axial movement and provides the restoring force for the pin mechanism.
3Ease of operation
If a lever mechanism is introduced to reduce user effort, then ease of operation improves, but the device complexity increases
Solution Approach 1:
The lever is designed as a simple pivoting element that can move between two stable positions, providing dynamic operation with minimal complexity. The pivot connection allows the lever to rotate freely while maintaining connection to both the casing and the safety pin, creating a simple yet effective mechanical advantage system.
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 enables effortless coupling and uncoupling with reduced energy consumption and production costs, enhancing user ergonomics and operational efficiency while maintaining secure axial movement prevention.
Implementation Method 1
a spring 3. The safety pin 2 is an element preventing axial movements of the coupling splined yoke 1. The spring 3 prevents the safety pin 2 from falling out.
Implementation Method 2
The spring 3 enables the proper positioning of the safety pin 2. The spring 3 prevents the safety pin 2 from falling out.
Implementation Method 3
The lever 5 enables a user to exert less force when moving the safety pin 2 when mounting and dismounting the coupling yoke 1 or the entire transmission shaft.
Implementation Method 4
The lever 5 enables a user to exert less force when moving the safety pin 2
Implementation Method 5
A spring ring 7 prevents axial movement of the casing 4 and prevents the casing 4 from falling off the coupling splined yoke 1.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A protective casing with a movable lever for a coupling splined yoke with a safety pin for coupling or uncoupling of a transmission shaft. The casing (4) is hollow and of a triangular shape with rounded corners and that into the casing (4) there is arranged a lever (5) covered by a cover (6) with a yoke (1). The yoke (1) is provided with a safety pin (2) and a spring (3) that enables a proper position of the safety pin (2). Said safety pin (2) prevents axial movements of the coupling splined yoke (1) and the casing (4) enables a proper position and function of the remaining elements and connects them into an entity. The lever (5) enables a user to exert less force when moving the safety pin (2) when mounting and dismounting the coupling splined yoke (1) or the entire transmission shaft. The cover (6) acts as a protection of the interior of the casing (4) against impurities from the environment, wherein a spring ring (7) prevents axial movement of the casing (4) and prevents the casing (4) from falling off the coupling splined yoke (1). The lever (5) acts as an intermediary between a user's finger/hand and the safety pin (2).