Terminal Base Bolt Holder Prevents Housing Damage
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Solution Overview
Problem
Existing terminal bases suffer from damage during electrical connection due to the bolt head being held at a side portion rather than the opening portion, leading to rotational forces that can cause damage to the housing.
Innovation Solution
A terminal base design featuring a straight strip plate-shaped bus bar with a bolt insertion hole, a holder that holds the bolt head's outer periphery over its entire circumference, and an O-ring to seal the gap between the bus bar and housing, preventing damage by distributing the rotational force effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bolt accommodating portion is formed in a shape such that the bolt can be inserted by sliding from a direction orthogonal to the bolt shaft, then the ease of assembly is improved, but the reliability deteriorates due to damage occurring when the nut is tightened strongly
Solution Approach 1:
The holder is pre-installed on the bus bar before assembly, with the bolt holding portion already positioned to receive the bolt head. This preliminary positioning ensures that when the bolt is inserted and the nut is tightened, the bolt head is immediately captured by the holder, preventing rotational damage to the housing while maintaining the sliding insertion advantage.
Solution Approach 2:
The holder acts as an intermediary component between the bolt and the housing. It captures and holds the bolt head, serving as a mediator that prevents the direct transmission of rotational forces from the nut tightening process to the housing, thereby preventing damage while allowing the sliding assembly method to proceed.
2Device complexity
If the bolt head is held at a side portion of the bolt accommodating portion, then the device complexity is reduced, but the strength deteriorates due to insufficient holding force during tightening
Solution Approach 1:
The holder extends in the thickness direction of the bus bar, creating a three-dimensional holding structure. The bolt holding portion protrudes from the bus bar surface and captures the bolt head from multiple sides, providing sufficient holding force without adding complex lateral structures to the bolt accommodating portion.
Solution Approach 2:
The holder is designed as a separate, integrated component on the bus bar rather than part of the housing structure. This segmentation allows the holding function to be concentrated in a dedicated structure that can provide strong holding force independently, while the housing maintains its simple sliding accommodation shape.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly improves the holding force and prevents damage to the housing during electrical connection by securely holding the bolt head with the holder, reducing the risk of the bolt falling off or the housing being abraded.
Implementation Method 1
an O-ring (26) configured to be mounted on the bus bar (23) at a middle of the bus bar (23) to seal a gap between the bus bar (23) and the housing (55)
Data Source
AI summary
A terminal base includes a straight, strip plate-shaped bus bar having a first end and a second end, the first end having a bolt insertion hole, a bolt configured to be inserted into the bolt insertion hole for electrical connection, the bolt having a head, a housing into which the bus bar is inserted from the second end of the bus bar such that the second end extends out of the housing, an O-ring configured to be mounted on the bus bar at a middle of the bus bar to seal a gap between the bus bar and the housing and a holder configured to regulate a movement of the O-ring. The holder is provided on the bus bar. The holder includes a bolt holding portion configured to hold an outer periphery of the head of the bolt over an entire circumference of the outer periphery of the head.