Battery Unit Cable Routing Under a Compact Work Machine Frame
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Solution Overview
Problem
In small-sized work machines, the narrow space between the battery unit and the cover above it poses a challenge for passing wiring members, making it difficult to connect electrical components efficiently.
Innovation Solution
The work machine design includes a turning frame with a battery unit, a first connection portion for power input/output, a second connection portion for power distribution above the battery unit, and a wiring member that passes below the battery unit to connect these portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the cable is passed above the battery unit to connect the connection portion to the junction box, then the cable length can be suppressed, but it becomes difficult to pass the cable through the narrow space between the battery unit and the cover in small-sized work machines
Solution Approach 1:
Instead of passing the cable above the battery unit as in conventional designs, the patent inverts the routing path by passing the cable below the battery unit. This is achieved by providing a cable passage in the battery unit that allows the cable to pass through from the front surface side to the rear surface side via the bottom surface, thereby avoiding the narrow space between the battery unit and the cover while still achieving efficient cable length management.
Solution Approach 2:
The patent transitions the cable routing from a two-dimensional path (above the battery unit) to a three-dimensional path that utilizes the internal structure of the battery unit. By creating a cable passage that goes through the bottom surface of the battery unit, the design adds a vertical dimension to the routing path, allowing the cable to bypass the spatial constraint between the battery unit and the cover.
2Device complexity
If the connection portion is provided on the front surface side of the battery unit, then the cable length can be suppressed when passed above, but the narrow space in small-sized work machines makes cable passage difficult
Solution Approach 1:
The patent inverts the conventional cable routing approach by passing the cable below the battery unit instead of above it. The battery unit is designed with an integrated cable passage that guides the cable from the front surface side, through the bottom surface, to the rear surface side, thereby achieving simple wiring arrangement without requiring additional space between the battery unit and the cover.
Solution Approach 2:
The patent merges the cable passage function into the battery unit structure itself. The battery unit is designed to include an integrated passage that accommodates the cable, combining the structural functions of the battery unit with the routing function, thereby eliminating the need for separate cable management components and additional installation space.
Data Source
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AI summary
[Problem] A technique capable of appropriately disposing a wiring member in a work machine including a battery unit is provided. [Solution] An exemplary work machine is a work machine including a turning body in front of which a work device is disposed, the work machine including: a turning frame constituting a bottom portion of the turning body; a battery unit disposed on the turning frame; a first connection portion that inputs electric power to the battery unit or outputs electric power of the battery unit; a second connection portion that is disposed above the battery unit and distributes electric power; and a wiring member that passes below the battery unit and connects the first connection portion to the second connection portion.