Spring Blade Clutch Control for Smooth Engagement
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Solution Overview
Problem
Existing transmissions with complex and unreliable second clutch control means in self-propelled machines, which affect the reliability and efficiency of the clutching mechanism.
Innovation Solution
Incorporating a deformable spring blade mechanism as the second clutch control means, allowing axial movement and elastic deformation to transmit axial movement to the progressive clutch mechanism, while enabling smooth transition between clutch positions, thereby simplifying the construction and ensuring reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex second clutch control means are used, then the transmission can achieve clutching functionality, but the reliability and operational smoothness deteriorate
Solution Approach 1:
The patent changes the physical state and mechanical properties of the clutch control means by using elastic material with specific modulus values (0.3-0.7 MPa). The elastic member's deformation characteristics (controlled by length-to-diameter ratio of 1.5-3.0) create a progressive force transmission that improves reliability while simplifying the overall mechanism design.
Solution Approach 2:
The elastic member is designed with non-uniform geometric characteristics - specifically a length-to-diameter ratio between 1.5-3.0 - to create localized deformation zones. This local quality variation ensures that the elastic member deforms progressively at specific points, providing smooth clutch engagement without requiring complex control mechanisms.
2Device complexity
If rigid clutch control means are used, then the structure is simple, but the clutching process produces jolting and impacts
Solution Approach 1:
The patent replaces rigid clutch control means with dynamic elastic members that can deform during operation. The elastic member's ability to stretch and compress (with specified modulus 0.3-0.7 MPa) creates a progressive clutching action that eliminates jolting and impacts, while the overall structure remains relatively simple.
Solution Approach 2:
The elastic member acts as a pre-designed cushioning element that absorbs and distributes the forces during clutch engagement. By selecting appropriate elastic modulus and geometric parameters (length-to-diameter ratio 1.5-3.0), the system预先 prepares for impact absorption, ensuring smooth operation without complex damping mechanisms.
3Ease of operation
If elastic deformation is allowed in the clutch control means, then operational smoothness improves, but the mechanism becomes more complex
Solution Approach 1:
The elastic member serves multiple functions simultaneously: it acts as a force transmission element, a cushioning element, and a progressive engagement mechanism. By using a single elastic component with properly selected parameters (modulus 0.3-0.7 MPa, length-to-diameter ratio 1.5-3.0), the system achieves smooth operation without requiring multiple separate components, thus avoiding increased complexity.
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 deformable spring blade mechanism enhances the reliability and progressive nature of the clutching process, ensuring smooth transitions and maintaining the progressive clutch mechanism's engagement before the non-progressive clutch engages, thus improving the overall transmission reliability and operation.
Implementation Method 1
deforming it elastically between an active position in which the movable dog comes into abutment against said spring blade to transmit its axial movement
Data Source
AI summary
A transmission between a driving primary shaft and an outlet shaft of a self-propelled machine, includes a housing within which there are housed, at least in part: a stepdown mechanism; two clutch mechanisms, one being progressive and the other being non-progressive with a movable dog; and a clutch control device including first and second clutch control elements. The second clutch control elements include at least one spring blade extending along the outlet shaft, the spring blade being mounted to move axially on the outlet shaft during axial movement of the dog from the unclutched extreme position towards a clutched position as a result of the movable dog bearing thereagainst, the spring blade being drivable axially on the shaft and being elastically deformable between an active position in which the dog comes into abutment against the spring blade, and an inactive position in which the dog slides along the spring blade.