Spur Gear Blocking Mechanism Radial Latching
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Solution Overview
Problem
Existing spur gear blocking mechanisms require high forces to maintain the adjustment position, leading to mechanical overload and inefficiencies in compact designs, particularly in applications like motor vehicle level controls where torque transmission needs to be selectively blocked.
Innovation Solution
A spur gear design featuring an intermediate wheel with a helical guide track and a radially offset latching position, reducing the mechanical load on the blocking mechanism by allowing the latching position to be shifted outward, and incorporating a blocking lever with a locking pin that engages in a guide track to securely lock the gear in place, facilitating easy engagement and preventing unintentional unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the latching position is formed between two guide tracks, then the blocking mechanism can be implemented, but high forces act on the blocking mechanism leading to mechanical overload
Solution Approach 1:
The latching position is moved from a position between guide tracks to a position on the radially outer guide wall, utilizing the radial dimension to reduce forces. This dimensional shift allows the blocking mechanism to operate with lower mechanical load while maintaining reliability
2Reliability
If the intermediate wheel has a larger diameter to accommodate the guide track structure, then the blocking mechanism can function, but the overall spur gear size increases
Solution Approach 1:
By positioning the latching position on the radially outer guide wall rather than between guide tracks, the design efficiently utilizes the radial space, allowing for a more compact intermediate wheel diameter while maintaining blocking mechanism functionality
3Force
If the latching position is shifted radially outward, then forces on the blocking mechanism are reduced, but the guide track structure becomes more complex
Solution Approach 1:
The radially outer guide wall is specifically designed with a recess to form the latching position, creating a localized structural feature that reduces forces without requiring complete redesign of the entire guide track system
Data Source
AI summary
A spur gear includes an input wheel, an output wheel, and an intermediate wheel, which engages via a gear with a gear on the input wheel and with a gear on the output wheel. A blocking mechanism is provided on the intermediate wheel which, in a first operating state, permits the transmission of torque from the input wheel to the output wheel and, in a second operating state, blocks the transmission of torque from the input wheel to the output wheel. At least one guide track for the blocking mechanism is formed on the intermediate wheel, the guide track having a radially inner guide wall and a radially outer guide wall. A latching position for blocking the blocking mechanism is formed on the radially outer guide wall.