Motor Driver Inclination for Straddled Vehicle Storage
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Solution Overview
Problem
Straddled vehicles equipped with motor generators face challenges in accommodating large helmets due to the size requirements of the motor driver, which enlarges the vehicle in both the front-rear and vertical directions, and complicates storage of small items.
Innovation Solution
The motor driver is positioned below the second storage portion, inclined forward and downward, overlapping with the second storage portion, allowing for deeper storage of large helmets while maintaining space for small items and reducing the vehicle's size by utilizing the space between seat frames and shallow bottom of the second storage portion for heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor driver is disposed behind the storage box in an upright posture, then the motor driver can be accommodated with sufficient heat dissipation space, but the rear portion of the vehicle is enlarged in both the front-rear direction and the vertical direction
Solution Approach 1:
The motor driver is disposed in an inclined posture rather than upright, changing the spatial orientation from vertical to diagonal. This dimensional change allows the motor driver to utilize the inclined space between the storage box and the seat frame, accommodating the motor driver without increasing the vehicle's vertical height while maintaining sufficient space for heat dissipation
2Length of stationary object
If the motor driver is disposed in the recess on the side surface of the storage box, then the vehicle size is reduced, but the capacity of the storage box becomes small and it is difficult to store a large helmet
Solution Approach 1:
The storage box is divided into two separate storage portions: a first storage portion for storing large items such as helmets, and a second storage portion for storing small items. This segmentation allows the motor driver to be disposed in the inclined space beneath the second storage portion without compromising the capacity of the first storage portion for large helmets
3Volume of stationary object
If the storage box is designed with large depth and width to accommodate a large helmet, then the helmet storage capacity is sufficient, but the rear portion of the vehicle is further enlarged in the front-rear direction
Solution Approach 1:
The motor driver is disposed in an inclined posture utilizing the diagonal space between the storage box and the seat frame. This inclined arrangement allows sufficient depth in the first storage portion for helmet storage while preventing excessive enlargement of the vehicle's front-rear length by efficiently utilizing the available inclined space
4Ease of operation
If the space for small items is designed to be shallow for convenient loading and unloading, then the storage convenience is improved, but the total storage capacity is reduced
Solution Approach 1:
The storage box is segmented into two portions with different depth characteristics: the first storage portion has large depth for helmets, while the second storage portion has shallow depth for small items. This segmentation enables the shallow second storage portion to provide convenient access for small items while the deeper first storage portion maintains adequate capacity for helmets
Data Source
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AI summary
A storage box (30) includes a first storage portion (31) and a second storage portion (32). The first storage portion (31) is configured to store a helmet. The second storage portion (32) is disposed behind the first storage portion (31). A motor driver (62) is at least partially located below a second bottom wall (84) of the second storage portion (32). In the vehicle plan view, the motor driver (62) at least partially overlaps with the second storage portion (32). The motor driver (62) is disposed to be inclined forward and downward. As seen in a vehicle side view, the forward extension line of the motor driver (62) overlaps with the first storage portion (31). In a vehicle width direction, the motor driver (62) is disposed between a left seat frame (14L) and a right seat frame (14R). As seen in the vehicle side view, the motor driver (62) at least partially overlaps the left seat frame (14L) or the right seat frame (14R). (Figure 7)