Integrated Gear Shift Hub for Fast and Stable Vehicle Parking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle parking systems face issues with force failures between the parking pawl and ratchet, leading to reduced parking safety and system failures.
Innovation Solution
A gear shifting and parking system with a driving mechanism, parking mechanism, and gear shifting mechanism, featuring a gear shifting hub, shifting heads, and a ratchet, which allows for high integration, few components, and small space occupation, while improving response speed and structural stability, preventing failures, and enhancing parking safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a parking pawl is driven by a parking arm to realize parking through the cooperation between the parking pawl and a ratchet, then the parking system can prevent the car from slipping during parking, but a force between the parking pawl driven by the parking arm and the ratchet is apt to fail, which causes the failure of the parking system and reduces the parking safety
Solution Approach 1:
The patent combines the gear shifting mechanism and parking mechanism into a single integrated system. The gear shifting hub serves dual purposes: it controls both gear shifting through the first shifting head and parking through the second shifting head. This merging of functions reduces the number of components and improves reliability by eliminating separate mechanical systems that could fail independently.
Solution Approach 2:
The gear shifting hub is designed as a universal component that performs multiple functions. It contains both the first gear shifting groove for gear changes and the second gear shifting groove for parking operations. The single hub controls both shifting heads, making one component serve multiple critical functions in the transmission system.
2Device complexity
If the gear shifting and parking mechanisms are integrated into a single system, then the system achieves high integration, few components, and small space occupation, but the force between the parking pawl and ratchet may fail
Solution Approach 1:
The patent merges the gear shifting mechanism and parking mechanism into one integrated system controlled by a single gear shifting hub. This consolidation reduces component count and simplifies the overall structure while maintaining functional separation through distinct shifting grooves and heads, thereby improving reliability through reduced mechanical interfaces.
Solution Approach 2:
Within the integrated hub, the patent segments the control paths by providing separate first and second gear shifting grooves, each dedicated to specific functions (gear shifting and parking respectively). This functional segmentation within the unified structure allows independent operation of each mechanism, preventing failure in one function from affecting the other.
3Speed
If the second gear shifting groove is provided with a parking groove section and a driving groove section, then the response speed of shifting between the parking gear P and the driving gear N-P is improved, but the structural complexity of the groove design increases
Solution Approach 1:
The second gear shifting groove is designed with dynamic characteristics through its varying depth profile. The groove depth changes correspondingly according to the gear shifting requirements, creating optimized transition paths between parking and driving positions. This dynamic groove design enables faster shifting response by providing pre-calculated optimal movement trajectories for the second shifting head.
Solution Approach 2:
The patent applies parameter changes by varying the depth of the second gear shifting groove along its length. The groove depth is not uniform but changes to optimize the shifting path, allowing the second shifting head to transition quickly between parking and driving positions while maintaining structural integrity and controlling complexity through a single geometric parameter modification.
Data Source
Figure 1
Figure 2~3
AI summary
A gear shifting and parking system (100) for a vehicle, and a vehicle having same. The gear shifting and parking system (100) comprises a driving mechanism (10), a parking mechanism (30), and a gear shifting mechanism (20), wherein the gear shifting mechanism (20) comprises a gear shifting hub (21) and a first shifting block (22); a first gear shifting groove (a) and a second gear shifting groove (b) are provided in the gear shifting hub (21); the first shifting block (22) is in sliding fit with the first gear shifting groove (a) so as to be switched among multiple gears; the parking mechanism (30) has a second shifting block (31), wherein the second shifting block (31) is in sliding fit with the second gear shifting groove (b) so as to be switched between a parking gear (P) and a driving gear (N-P). On one hand, the gear shifting and parking system (100) is high integrated, the number of parts is less, and occupied space is smaller, and on the other hand, the response speed of switching between the parking gear (P) and the driving gear (N-P) can be increased, the structural stability of the parking mechanism (30) at the parking gear (P) can be improved, the parking mechanism (30) is prevented from failing at the parking gear (P), the parking safety is improved, and sliding is avoided.