Joint Structure With Side-Inserted Pin for Fluid Passage Assembly
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Solution Overview
Problem
Existing joint structures face difficulties in assembling an upper block with a sleeve to a lower block when a fluid passage is present, as the auxiliary member is challenging to attach due to interference with the pin and bolt insertion holes.
Innovation Solution
A joint structure design featuring first and second pin and sleeve insertion slits, along with inclined surfaces on the auxiliary member, allows for easy assembly by enabling the upper block and sleeve to be inserted laterally and stabilized during assembly, facilitated by a bolt and pin system that secures the components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sleeve having a fluid passage is provided between the pin insertion hole and the bolt insertion hole in the upper block, then the fluid passage connectivity is improved, but the assembly process becomes difficult due to interference with auxiliary member attachment
Solution Approach 1:
The pin insertion hole is changed from a conventional vertical orientation to a horizontal orientation that passes through the side surface of the upper block perpendicular to the longitudinal direction. This dimensional change allows the pin to be inserted from the side rather than from above, avoiding interference with the vertically positioned sleeve and auxiliary member attachment process.
Solution Approach 2:
The pin insertion hole is segmented into two separate holes: a first pin insertion hole formed in the upper block and a second pin insertion hole formed in the auxiliary member. This segmentation allows independent positioning and insertion paths for the pin, enabling it to pass through both components without interfering with the sleeve or other attachment operations.
2Ease of operation
If the pin insertion hole is positioned to allow lateral insertion of the upper block, then the ease of assembly is improved, but the positioning precision may be compromised
Solution Approach 1:
The pin passes through both the upper block and the auxiliary member in a nested arrangement, with the pin shaft portion inserted into the first pin insertion hole of the upper block and the second pin insertion hole of the auxiliary member. This nested configuration ensures precise relative positioning of the two components while maintaining lateral insertion capability.
Solution Approach 2:
The pin acts as an intermediary element that mediates between the upper block and the auxiliary member, providing both the lateral insertion path for ease of assembly and the precise positioning through its threaded engagement with the lower block and abutment against the auxiliary member.
Data Source
AI summary
A joint structure includes an upper block arranged on a lower block, a sleeve inserted into the upper block, an auxiliary member provided on an upper surface of the upper block, a pin in which a first shaft portion is inserted into a first pin insertion slit and a second pin insertion slit, and a first male threaded portion is screwed into the lower block, and a bolt. The first pin insertion slit of the upper block opens to one side surface of the upper block in a longitudinal direction, the second pin insertion slit of the auxiliary member opens to one side surface of the auxiliary member in the longitudinal direction. A lower surface of the auxiliary member is formed by a pair of inclined surfaces that gradually extends away from an upper surface of the auxiliary member from both ends in the longitudinal direction toward a center.