Multiple Plate Clutch Lifter Plate Spring Segmentation
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Solution Overview
Problem
Conventional multiple plate clutches require high-precision parts and control methods to adjust clutch capacity steplessly, leading to a complex structure that is difficult to implement effectively for reducing shift shock in automatic transmission vehicles.
Innovation Solution
A multiple plate clutch design featuring a main spring and a sub spring system, where the sub spring's urging force is cut off by lifting a lifter plate, allowing the clutch capacity to be set at multiple stages, thereby reducing shift shock with a simpler structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-precision parts and control methods are used to adjust clutch capacity steplessly, then clutch capacity control precision is improved, but device complexity increases
Solution Approach 1:
The clutch capacity adjustment is segmented into discrete stages rather than continuous adjustment. The lifter plate is designed with multiple positioned holes that correspond to different clutch capacity levels, allowing stepwise adjustment of the spring's effective length and thus the clutch capacity. This segmentation eliminates the need for high-precision continuous control mechanisms while achieving sufficient control precision through discrete stages.
Solution Approach 2:
The clutch capacity is made dynamically adjustable through the lifter plate mechanism. By selectively positioning the lifter plate at different holes along its travel path, the effective length of the spring is dynamically changed, thereby adjusting the clutch capacity. This dynamic adjustment mechanism replaces complex high-precision control systems with a simple mechanical positioning system.
2Adaptability or versatility
If clutch capacity is adjusted continuously, then adaptability is improved, but device complexity increases
Solution Approach 1:
The clutch capacity adjustment is segmented into discrete stages rather than continuous adjustment. The lifter plate is designed with multiple positioned holes that correspond to different clutch capacity levels, allowing stepwise adjustment of the spring's effective length and thus the clutch capacity. This segmentation eliminates the need for high-precision continuous control mechanisms while achieving sufficient control precision through discrete stages.
Solution Approach 2:
The clutch capacity is adjusted by changing the effective length parameter of the spring through the lifter plate mechanism. By selectively positioning the lifter plate at different holes along its travel path, the spring's effective length is changed, thereby adjusting the clutch capacity. This parameter change approach provides adaptability without requiring complex control systems.
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 design enables easy matching of intermediate clutch capacity with set values using a relatively simple control method, reducing shift shock by varying clutch capacity, while maintaining a compact and efficient mechanism.
Implementation Method 1
a main spring (95) that is provided between a clutch center (92) fixed in an axial direction and a pressure plate (93) displaceable in the axial direction and presses a plurality of clutch plates (94) in a clutch engagement direction
Implementation Method 2
a sub spring (97) for urging the pressure plate (93) in a clutch engagement direction through the lifter plate (96) is provided between the clutch center (92) and the lifter plate (96)
Implementation Method 3
a lifter plate (96) for lifting the pressure plate (93) in a clutch release direction
Data Source
AI summary
In a multiple plate clutch having a main spring which is provided between a clutch center fixed in an axial direction and a pressure plate displaceable in the axial direction and presses plural clutch plates in a clutch engagement direction, and a lifter plate for lifting the pressure plate in a clutch release direction, a sub spring for urging the pressure plate in the clutch engagement direction through the lifter plate is provided between the clutch center and the lifter plate, and the lifter plate is lifted by a predetermined amount or more to cut off the urging force of the sub spring to the pressure plate.