Chip Socket Load Plate Retention to Prevent Bolt Push-Out
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Solution Overview
Problem
Existing chip socket retaining structures face issues where unfixed bolts can move closer to nuts due to load plate movement, causing them to be pushed out and lost during assembly.
Innovation Solution
A chip retaining structure featuring a seat frame with a pivotable load plate, through holes with inward flanges, and retaining groups consisting of bolts, nuts, and collars, where the collar limits the bolt's movement by abutting with the flange, preventing displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple bolts are used to fasten the load plate to the chip connector, then the fixation reliability is improved, but the risk of unfixed bolts being pushed out and lost increases
Solution Approach 1:
The collar acts as an intermediary component between the bolt and the load plate. It prevents the bolt from being pushed out by the moving load plate while still allowing the bolt to be screwed into the nut. The collar's flange portion abuts against the flange of the through hole, creating a mechanical barrier that stops bolt displacement.
Solution Approach 2:
The collar is pre-installed on the bolt before assembly, with its position predetermined by the interference fit between the collar's bottom face and the bolt's second cylinder portion. This preliminary positioning ensures that when the load plate moves during assembly, the bolt is already protected by the collar and cannot be pushed out.
2Ease of operation
If the load plate is made pivotable to cover the chip module, then the ease of operation is improved, but the stability of bolt position deteriorates
Solution Approach 1:
The collar serves as a mediator that decouples the movement of the load plate from the bolt position. While the load plate can pivot freely for ease of operation, the collar prevents this movement from being transmitted to the bolt, thereby maintaining bolt position stability despite load plate mobility.
3Ease of manufacture
If the collar is interference-fitted to the bolt, then the ease of manufacture is improved, but the device complexity increases
Solution Approach 1:
The retaining structure is segmented into distinct functional components: the bolt for fastening, the collar for positioning and protection, and the nut for securing. This segmentation allows each component to be manufactured independently using standard processes, with the interference fit between collar and bolt being a simple cylindrical mating that is easy to manufacture.
Data Source
AI summary
A chip retaining structure adapted for fixing a chip module in a chip socket includes a seat frame, a load plate and two retaining groups. The load plate is assembled on the seat frame and pivotable relative to one side of the seat frame. The load plate defines at least two through holes. Each through hole has a flange protruding inwardly adjacent to an upper face of the load plate. Each retaining groups comprises a bolt, a nut, and a collar. The bolt includes a nut portion, a first cylinder portion, a second cylinder portion, and a threaded portion. The nut is retained in the seat frame and screwed with the threaded portion. The collar is sleeved on the second cylinder portion and defines a flange portion. The bolt is limited in an up and down direction by the nut portion and the flange portion of the collar.