Dual-Power Reducer Locking Structure for Off-Road Torque and Parking
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Solution Overview
Problem
Current dual power source driven reducers lack effective utilization of power during extreme off-road driving and have unreliable parking mechanisms, particularly on steep slopes, leading to incomplete parking and slipping risks.
Innovation Solution
A differential lock and parking structure comprising a movable and fixed fluted disc assembly with an electromagnetic armature, and a parking mechanism with a pawl assembly and cam system, allowing for relative rotation locking between power sources and mechanical parking, enhancing torque and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two power sources output power independently in current dual power source driven reducer, then the structure is simple, but the ability of power sources cannot be effectively utilized, reducing the ability of getting unstuck and driving pleasure
Solution Approach 1:
The patent merges the two independent power sources into a unified power transmission system through a differential mechanism. The first and second pinions, driven by separate power sources, mesh with a common gear, allowing power to be combined and transmitted together. This enables effective utilization of both power sources for extreme off-road driving while maintaining a relatively compact structure.
2Reliability
If electronic brake and other mechanisms are used for parking, then the structure is compact, but the reliability is low, causing risk of incomplete parking and slipping on steep slopes
Solution Approach 1:
The patent replaces the electronic brake-based parking system with a purely mechanical parking mechanism. A parking pawl engages with a parking gear to lock the output shaft, providing reliable mechanical parking. This mechanical substitution eliminates reliance on electronic systems, significantly improving parking reliability on steep slopes while adding only a simple mechanical locking component.
3Power
If differential lock mechanism with electromagnetic armature is added, then the power coupling and torque are improved, but the device complexity increases
Solution Approach 1:
The patent introduces a differential lock mechanism as an intermediary device between the two power sources and the output. The movable fluted disc assembly, controlled by an electromagnetic armature, acts as a mediator that can lock or unlock the connection between the first and second pinions. This allows power coupling and torque enhancement when needed, while remaining a relatively simple add-on component.
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 solution enables improved power coupling and torque for extreme off-road conditions, enhancing the vehicle's ability to get unstuck and ensuring safe mechanical parking, reducing the reliance on electronic brakes and improving driving pleasure.
Implementation Method 1
the fixed armature assembly is energized to generate an electromagnetic force to move the movable fluted disc assembly toward the fixed fluted disc assembly
Data Source
AI summary
A differential lock and parking structure is provided for a dual power source driving speed reducer, that includes first and second shafts, a differential lock mechanism, and a parking mechanism. The first and second shafts are connected to dual power sources, respectively; the differential lock mechanism and the parking mechanism are provided at the tail ends of the first and second shafts; and the differential lock mechanism includes a movable chainring assembly, a fixed chainring assembly, and a fixed armature assembly. The parking mechanism includes a parking gear integrated with a fixed chainring, a pawl assembly, and a parking cam assembly that drives the pawl assembly to realize the conversion between parking-in and parking-out.