Transmission Synchronizer Teeth With Integrated Mechanical Stop
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Solution Overview
Problem
Existing synchronization devices for manual vehicle transmissions require additional effort, cost, and space for mechanical attacks, which restrict design and increase complexity.
Innovation Solution
A synchronization device that integrates the mechanical switching stop into the clutch body's external toothing, allowing the sliding muffle to be synchronized without additional space requirements, using adjustable teeth and gaps that prevent further axial movement beyond the synchronized position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate mechanical stop component is used, then the sliding sleeve can be reliably stopped at the synchronized position, but the device complexity and installation space requirements increase
Solution Approach 1:
The patent merges the mechanical stop function with the clutch body's external teeth by designing specific stop sections on the clutch teeth that directly engage with contact sections on the sliding sleeve teeth. This integration eliminates the need for separate stop components while maintaining reliable positioning at the synchronized position.
Solution Approach 2:
The clutch body's external teeth are designed to serve multiple functions: power transmission through gear engagement and mechanical stopping through specifically shaped stop sections. This multi-functionality reduces the overall component count while ensuring reliable stopping action.
2Manufacturing precision
If additional mechanical stop components are added, then the sliding sleeve positioning is improved, but manufacturing costs and effort increase
Solution Approach 1:
The stop sections are integrated into the clutch body's external teeth design, allowing the stopping function to be achieved during the same manufacturing process as the gear teeth. This eliminates separate manufacturing operations and reduces overall manufacturing effort while maintaining precise positioning.
3Reliability
If the mechanical stop is implemented with additional components, then the stopping function is reliable, but the installation space requirements increase
Solution Approach 1:
The mechanical stop function is merged into the existing clutch body structure, utilizing the space already occupied by the external teeth. The stop sections are formed as part of the tooth geometry, requiring no additional installation space beyond what is already allocated for the clutch body.
4Measurement precision
If the sliding sleeve and clutch body teeth are designed with stop sections, then the synchronized position is precisely defined, but the design complexity of the teeth increases
Solution Approach 1:
The teeth are designed with uniform geometry except for specific local regions where stop sections are introduced. These localized modifications provide precise positioning functionality while minimizing the overall complexity increase, as most of the tooth structure remains standard.
Data Source
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AI summary
A synchronizing device (10) for a motor vehicle transmission comprises a sliding sleeve (14) and at least one clutch body (18). The sliding sleeve comprises internal teeth (20) with a plurality of sliding sleeve teeth (26) and intervening sliding sleeve tooth gaps (28). The clutch body (18) comprises external teeth (24) with a plurality of clutch teeth (30) and intervening clutch tooth gaps (32). The sliding sleeve (14) and the clutch body (18) are adjustable relative to each other in the axial sliding direction (X). In a synchronized position of the synchronizing device (10), the sliding sleeve teeth (26) are at least partially engaged in the clutch tooth gaps (32), and the clutch teeth (30) are at least partially engaged in the sliding sleeve tooth gaps (28).Two adjacent sliding sleeve teeth (26) each have a contact section (36), both of which are assigned to a special coupling tooth (30') that has two stop sections (38). Alternatively or additionally, two adjacent coupling teeth (30) each have a stop section (38), both of which are assigned to a special sliding sleeve tooth (26') that has two contact sections (36). In the synchronized position, the two stop sections (38) bear against each other, thereby forming a mechanical switching stop (34) in the axial sliding direction (X).