Vehicle Accessory Drive Roller Switching Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle auxiliary machine-driving devices cannot switch the drive source efficiently, limiting flexibility in power transmission.
Innovation Solution
An auxiliary machine-driving device with a fourth roller positioned between engine and motor generator rollers, a fifth roller always in contact with the motor generator roller, and an actuator to switch the fourth roller's position, enabling switching of the drive source by altering its contact state with other rollers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single friction wheel with a single actuator is used to switch between connecting/disconnecting torque transmission, then the device complexity is reduced, but the drive source switching capability is lost
Solution Approach 1:
The system is divided into multiple friction wheels (first friction wheel connected to engine, second friction wheel connected to motor generator, third friction wheel connected to accessory) that can independently engage or disengage. This segmentation allows different drive source combinations while maintaining relatively simple individual actuator designs for each wheel.
Solution Approach 2:
The multiple friction wheels serve universal functions by enabling the accessory to be driven by different sources (engine alone, motor generator alone, or both together). Each friction wheel can independently connect or disconnect its associated drive source, providing versatile drive source switching capability without requiring a completely complex reconfiguration system.
2Adaptability or versatility
If multiple rollers are added to enable drive source switching, then the drive source switching capability is improved, but the device complexity increases
Solution Approach 1:
The fourth roller acts as an intermediary idler wheel between the first and second friction wheels. By positioning and actuating this single intermediate roller, the system can control the engagement state of both the first and second friction wheels with the third roller, enabling drive source switching without requiring separate actuators for each friction wheel connection.
Solution Approach 2:
The fourth roller is designed to automatically control the engagement/disengagement of multiple friction wheel connections through its single actuation. When the fourth roller moves to engage the first and second rollers, it simultaneously establishes or breaks multiple torque transmission paths, allowing the system to self-regulate complex connections through a single actuator action.
3Weight of moving object
If a single idler roller is used to control multiple friction wheel connections, then the actuator load is reduced and size can be minimized, but the mechanism complexity increases
Solution Approach 1:
The fourth roller combines multiple functions into a single component: it acts as an idler wheel for both the first-friction-wheel-to-third-roller path and the second-friction-wheel-to-third-roller path. By merging these control functions into one roller, the system reduces the number of actuators needed while the geometric arrangement of rollers manages the inherent mechanical complexity.
Solution Approach 2:
The system uses spatial arrangement and geometric positioning of the rollers in a two-dimensional plane to manage complexity. The fourth roller's position and the angular relationships between all rollers create a geometric control mechanism that reduces actuator complexity while maintaining multiple connection capabilities through careful layout rather than complex mechanical linkages.
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
Enables efficient switching of the drive source for auxiliary machines by changing the position of a single idler roller, reducing the load on the actuator and allowing for reduced size and faster engine restart times.
Implementation Method 1
a fourth roller (first idler roller) disposed between a first roller (engine roller) that rotates integrally with the rotary shaft of the engine (3) and a second roller (motor generator roller) that rotates integrally with the rotary shaft of a motor/generator (2)
Implementation Method 2
a fifth roller (second idler roller) that is always in contact with the second roller (motor generator roller) and a third roller (water pump roller) that rotates integrally with the rotary shaft of an auxiliary machine (4)
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
An auxiliary machine-driving device for a vehicle is provided with: a fourth roller provided between a first roller that rotates integrally with the rotary shaft of the engine and a second roller that rotates integrally with the rotary shaft of a motor generator; a fifth roller that is always in contact with the second roller and a third roller that rotates integrally with the rotary shaft of an accessory that is driven by the engine or the motor generator; and an actuator for switching the fourth roller between a state of contact with and a state of separation from the first and second rollers.