Floor Mat Access Cover for Secure Transmission Oil Port Closure
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Solution Overview
Problem
Existing work vehicles with floor mats for exposing injection ports for transmission oil face issues of unintentional opening, leading to poor appearance and clogging with dust.
Innovation Solution
A work vehicle design featuring a floor mat with an opening/closing portion that includes a protrusion and a hole for fixing, allowing the opening/closing portion to be securely closed and easily opened for transmission oil injection, using a handle for operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an opening/closing portion is provided in the floor mat to expose the injection port, then the injection port can be accessed, but the opening/closing portion may unintentionally open causing poor appearance and dust clogging
Solution Approach 1:
The floor mat is segmented into a main body and a separate opening/closing portion that can be independently manipulated. The opening/closing portion is further divided with a protrusion that can engage with the fixing portion, allowing the mat to be accessed when needed while maintaining a closed, clean appearance when not in use.
Solution Approach 2:
The protrusion is pre-positioned on the opening/closing portion to engage with the fixing portion before any opening action occurs. This preliminary engagement ensures that the opening/closing portion remains securely closed unless deliberately opened, preventing unintentional opening while maintaining ease of access when needed.
2Ease of operation
If the floor mat is made to be easily opened for injection, then operation is simplified, but the opening/closing portion becomes prone to unintentional opening
Solution Approach 1:
The fixing function is extracted as a separate feature (the protrusion engaging with the fixing portion) from the main body of the floor mat. This allows the opening/closing portion to be easily manipulated while the fixing mechanism provides secure closure without requiring complex interlocking structures.
Solution Approach 2:
The protrusion acts as an intermediary element between the opening/closing portion and the fixing portion. This simple geometric feature mediates the interaction between the movable opening/closing portion and the stationary fixing portion, enabling both easy operation and secure fixing without complex mechanisms.
3Reliability
If a fixing portion is added to prevent unintentional opening, then reliability improves, but the device complexity increases
Solution Approach 1:
The fixing portion is implemented as a localized geometric feature (a simple recess or groove) rather than a complex mechanical structure. This local quality change provides sufficient fixing capability to prevent unintentional opening while adding minimal structural complexity to the overall floor mat design.
Data Source
AI summary
A work vehicle includes a transmission case including an injection port to allow injection of transmission oil, a floor mat above the transmission case and near a driver's seat, the floor mat including an opening/closing portion to be opened in an open state in which the injection port is exposed and to be closed in a closed state in which the injection port is covered, and a fixing portion to fix the opening/closing portion in the closed state, in which the opening/closing portion includes a protrusion protruding in a predetermined direction, and the fixing portion includes a hole configured to fix the opening/closing portion when the protrusion is inserted into the hole.