Electric Work Vehicle Motor Positioning for Scratch-Free Attachment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric work vehicles face issues with motor attachment due to potential scratching of surfaces and interference from harnesses, especially when using materials with high hardness, leading to difficulties in smooth attachment and positioning.
Innovation Solution
A positioning mechanism with guide portions on the motor and support, utilizing pins and holes to align the motor relative to the support, preventing scratching and interference, and ensuring accurate attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the support is made of high hardness material (e.g., iron) to improve strength and durability, then the support can bear heavy loads, but the surface of the protrusion will be scratched during attachment due to contact with the hard support surface
Solution Approach 1:
A rubber buffer is introduced as an intermediary element between the protrusion and the support surface. The buffer contacts the protrusion first during attachment, preventing direct contact between the hard support surface and the protrusion surface, thereby avoiding scratches while maintaining the high strength of the iron support
2Manufacturing precision
If the motor is positioned using a recess and protrusion mechanism to achieve accurate alignment, then positioning precision is improved, but the attachment process becomes complex and may be interfered with by harnesses
Solution Approach 1:
The rubber buffer is pre-installed on the support surface at the attachment location before the motor attachment process. This preliminary action ensures that the buffer is already in position to guide and protect the protrusion during attachment, simplifying the overall process while maintaining positioning precision
Solution Approach 2:
The rubber buffer serves as a mediator that facilitates the attachment process by providing a compliant interface between the motor protrusion and the support, allowing harnesses to be routed around the buffer without interfering with the positioning mechanism
3Object-affected harmful factors
If the protrusion is made of soft material to prevent scratching, then surface damage is avoided, but the positioning accuracy and structural rigidity may be compromised
Solution Approach 1:
The rubber buffer acts as a mediator that absorbs the hardness mismatch between the iron support and the aluminum protrusion. The buffer's softness prevents scratching while its rigid structure maintains positioning accuracy, eliminating the need to compromise the protrusion material properties
Data Source
AI summary
An electric work vehicle includes a harness connecting a front portion of a motor to an inverter, and a positioning mechanism including a first guide portion on one of the motor and a support and a second guide portion on the other of the motor and the support, and configured to position the motor relative to the support as viewed in the front-back direction, by the first guide portion and the second guide portion coming in contact with each other. The positioning mechanism is configured such that, at a time of attaching the motor to the support, the first guide portion is contactable with the second guide portion while a protrusion is forward of a support front surface.