Synchronizer Ring Neutral Positioning via Spring Device
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Solution Overview
Problem
Synchronizer rings in synchronizing devices often fail to return precisely to the neutral position, leading to frictional contact with the gearwheel, causing noise, jolting, and asymmetrical loading of bearings, which results in undesirable force transmission and noise production.
Innovation Solution
A spring device is used to fix the synchronizer ring to the synchronizer body in a neutral position, ensuring a defined alignment and relative contact position, thereby preventing tilting and allowing for a consistent, low-friction displacement into the neutral position without tilting moments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a radially spring-mounted latching element is used to fix the synchronizer ring in neutral position, then the synchronizer ring can be positioned centrally and radially on the sliding sleeve, but the spring force cannot be precisely radially aligned causing tilting moments that prevent complete release from the gearwheel
Solution Approach 1:
The invention extracts the latching function from the spring-mounted element and implements it through a positive latching mechanism with a latching element and receptacle. This separates the positioning function (achieved through guide surfaces) from the latching function (achieved through the latching element engaging the receptacle), allowing the synchronizer ring to be reliably fixed in neutral position without the tilting moment problem caused by radial spring force misalignment.
2Object-affected harmful factors
If the synchronizer ring is not precisely returned to neutral position, then frictional contact with gearwheel occurs causing noise and jolting, but achieving precise positioning requires complex alignment mechanisms
Solution Approach 1:
The invention applies preliminary action through radially converging guide surfaces that actively guide the synchronizer ring into the correct neutral position during the resetting process. The guide surfaces pre-align the ring before the latching element engages, ensuring precise positioning without requiring complex adjustment mechanisms. This preliminary guidance action prevents frictional contact and noise generation.
3Force
If the synchronizer ring remains in frictional contact with the gearwheel in neutral position, then force is continuously transmitted causing bearing asymmetry and shrieking, but complete release requires precise alignment that is difficult to maintain
Solution Approach 1:
The invention introduces an intermediary latching mechanism that acts as a mediator between the synchronizer ring and the sliding sleeve. The latching element engages with the receptacle to provide positive latching in neutral position, ensuring complete release from the gearwheel. This intermediary mechanism translates the rotational movement into precise axial positioning, maintaining reliable alignment without continuous force transmission.
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
This solution ensures reliable positioning of the synchronizer ring in the neutral position, eliminating drag moments and noise, and maintaining optimal radial and axial alignment, thus preventing undesirable force transmission and noise production.
Implementation Method 1
the synchronizer ring is fixed to the synchronizer body in a neutral position by means of a spring device
Data Source
AI summary
The invention relates to a synchronizing device with a synchronizer body, a sliding sleeve, a gearwheel with coupling toothing and a synchronizer ring which is displaceable between synchronizer body and coupling toothing axially in and counter to the synchronization direction(s). With the specification of being able to position the synchronizer ring reliably in a neutral position, it is proposed that the synchronizer ring is fixed to the synchronizer body in the neutral position by means of a spring device.