Integrated Snap Ring Return Spring for Compact Transmission Brake
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Solution Overview
Problem
Vehicle transmissions face challenges in reducing component size to create additional space, as existing brake actuated systems are bulky and inefficient in terms of space utilization.
Innovation Solution
A fluid-operated clutch assembly with a ring-shaped return spring featuring axially extending coil springs and an integrated snap ring design, which reduces axial length and allows for compact positioning within the transmission housing, thereby minimizing space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate return spring and snap ring components are used in the brake assembly, then the brake can effectively bias the piston, but the axial length and overall size of the brake assembly increases
Solution Approach 1:
The patent combines the return spring and snap ring into a single integrated component. The return spring features an integrated snap ring portion at its second end, eliminating the need for a separate snap ring component. This merging reduces the number of parts and decreases the axial length of the brake assembly while maintaining the functional effectiveness of both the return spring (biasing the piston) and the snap ring (securing the spring in the groove).
Solution Approach 2:
The integrated return spring component performs multiple functions: it acts as both the return spring (providing biasing force to the piston) and the snap ring (securing itself in the housing groove). The integrated snap ring portion at the second end of the return spring enables the component to fulfill both roles simultaneously, reducing component count and assembly space requirements.
2Reliability
If multiple separate components (return spring, snap ring) are used in the brake assembly, then each component can be optimized for its specific function, but the number of components and assembly complexity increases
Solution Approach 1:
The patent merges the return spring and snap ring into a single integrated component, reducing the number of parts from two separate components to one. The integrated snap ring portion is formed as part of the return spring structure, eliminating the need for a separate snap ring component while maintaining the functional optimization of both elements.
Solution Approach 2:
The integrated return spring component performs multiple functions: it acts as both the return spring (providing biasing force to the piston) and the snap ring (securing itself in the housing groove). The integrated snap ring portion at the second end of the return spring enables the component to fulfill both roles simultaneously, reducing component count and assembly space requirements.
3Ease of manufacture
If traditional separate component design is used, then manufacturing of individual components is simplified, but the overall transmission size and space requirements increase
Solution Approach 1:
The patent combines the return spring and snap ring into a single integrated component that can be manufactured as one piece. The integrated snap ring portion is formed as part of the return spring structure, allowing for more efficient use of space within the transmission housing and reducing the overall transmission size.
Solution Approach 2:
The integrated return spring with its snap ring portion nested at the second end creates a compact structure where one functional element is incorporated within another. This nesting arrangement allows the component to fit more efficiently within the available space in the transmission housing.
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 a more compact brake assembly, allowing for reduced transmission size and improved space efficiency, facilitating smoother shifting and easier calibration while maintaining effective brake operation.
Implementation Method 1
a plurality of coil springs extending axially from a face of the return spring... The springs are engaged with and bias the piston away from the clutch pack
Data Source
AI summary
A brake or clutch assembly includes a piston that moves within a housing in response to fluid pressure and is engaged with a clutch pack. A ring-shaped return spring includes a plurality of coil springs extending axially from a face of the return spring. An outer periphery of the return spring is disposed in an annular groove in the housing which axially fixes the return spring in the housing. The springs are engaged with and bias the piston away from the clutch pack.