Planetary Gearbox Parking Brake With Gear Engagement Block
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Solution Overview
Problem
Existing vehicle parking brake systems are not effectively utilizing gear engagement to restrict motion in gear trains, leading to inefficiencies and potential safety concerns during vehicle stationary periods.
Innovation Solution
A vehicular parking brake arrangement that uses a gear engagement block to tie together two or more interconnected gears, preventing their rotational motion by engaging with the central and planetary gear assemblies, thereby ensuring the vehicle remains stationary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional parking brake system is used, then the vehicle can be held stationary, but the system does not effectively utilize gear engagement leading to inefficiencies and potential safety concerns
Solution Approach 1:
The patent combines the parking brake function with the existing gear train system by introducing a gear engagement block that interfaces directly with the planetary gear assemblies. This merges two previously separate functions (braking and gear transmission) into a unified mechanical system, improving reliability while avoiding the complexity of separate brake mechanisms.
Solution Approach 2:
The gear engagement block serves as an intermediary component between the actuator mechanism and the planetary gear assemblies. It translates actuator motion into gear engagement/disengagement, providing a reliable mechanical linkage that enhances parking brake effectiveness without requiring complex direct actuation of the gears.
2Reliability
If gear engagement block is introduced to restrict motion, then parking brake effectiveness is improved, but device complexity increases
Solution Approach 1:
The parking brake system is segmented into distinct functional components: the gear engagement block with gear teeth, the actuator mechanism, and the planetary gear assemblies. This segmentation allows each component to perform its specific function independently while working together as a unified system, improving effectiveness without creating不可维护的 complexity.
Solution Approach 2:
The gear engagement block serves multiple functions: it engages with the planetary gear assemblies to prevent rotation, provides a mechanical linkage for the actuator, and interfaces with the existing gear train. This multi-functionality improves parking brake effectiveness while minimizing the need for additional specialized components.
3Reliability
If gear engagement block with multiple gear teeth is used, then motion restriction is more effective, but manufacturing complexity increases
Solution Approach 1:
The gear engagement block uses uniform gear teeth that are homogeneous in design and can be manufactured using standard gear cutting processes. This homogeneity allows the complex multi-tooth gear block to be manufactured with the same ease as conventional single-tooth gears, maintaining ease of manufacture while achieving effective motion restriction through multiple engagement points.
Data Source
AI summary
A gearbox parking brake has a gearing assembly in which two or more interconnected gears can rotate at different directions or speeds. A first and second planetary gear assembly and a central gear are concentrically positioned about a central rotation axis, and the central gear is rotatably engaged with the two planetary gear assemblies. An input is engaged with the central gear in order to operate the planetary gear assemblies, which may function as outputs. A gear engagement block is provided with sets of gear teeth corresponding to the planetary gear assemblies and the central gear. An actuator mechanism is operatively connected to the gear engagement block in order to displace the gear engagement block between a disengaged position and an engaged position. The gear teeth of the gear engagement block are meshed with the gearing assembly in the engaged position, restricting any movement of the gearing assembly.