Road Roller Battery Layout for Weight Balance and Easy Replacement
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Solution Overview
Problem
Existing work machines face challenges in achieving balanced weight distribution and efficient battery mounting, particularly when electrified, leading to reduced operability and stability during travel.
Innovation Solution
A work machine design with inclined batteries inserted through separate openings on the housing, positioned symmetrically and offset to optimize weight balance and reduce worker burden during battery replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If batteries are mounted vertically without inclination, then the structure is simple, but the center of gravity position is high and weight balance is poor
Solution Approach 1:
The patent applies asymmetry by inclining the batteries at a specific angle (e.g., 30 degrees) relative to the vertical direction. This asymmetric mounting configuration shifts the center of gravity to a lower position and achieves better weight balance in the work machine, resolving the contradiction between stability improvement and structural complexity.
2Ease of operation
If batteries are mounted vertically, then the mounting structure is simple, but the worker burden during battery replacement is high
Solution Approach 1:
The inclined battery mounting creates an asymmetric structure where batteries are positioned at an angle rather than vertically. This design allows workers to more easily access and remove batteries by pulling them in an upward direction, reducing physical burden while accepting increased structural complexity.
3Reliability
If batteries are positioned to lower center of gravity, then operability and stability improve, but the battery mounting structure becomes complex
Solution Approach 1:
The patent uses asymmetric inclined mounting of batteries within the housing to lower the center of gravity and improve traveling stability. The housing structure is designed with inclined slots or guides that accommodate the angled battery positions, achieving reliability improvement at the cost of increased structural complexity.
Solution Approach 2:
The patent transitions from vertical (one-dimensional) battery mounting to inclined multi-dimensional positioning. By arranging batteries at angles in multiple spatial dimensions, the design achieves lower center of gravity and improved stability while requiring a more complex three-dimensional housing structure to accommodate the arrangement.
Data Source
AI summary
A work machine that compacts a road surface by rotation of a roller, the work machine comprises: a motor that outputs a driving force for rotating the roller; a first battery and a second battery that supply electric power to the motor; and a housing that holds the motor, the first battery, and the second battery. An upper surface of the housing has: a first opening into which the first battery is insertable, and a second opening into which the second battery is insertable, and in a front view of the work machine. The first battery inserted from the first opening and the second battery inserted from the second opening are inclined in different directions with respect to a normal line of the road surface and held by the housing.