Bolt Locking Mechanism for CPU Loading Assembly
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Solution Overview
Problem
Existing loading mechanisms for CPUs on circuit boards face issues with bolt loosening due to rotation relative to locking thread sleeves, requiring costly adhesives and complicating installation.
Innovation Solution
A loading assembly with a first connection assembly featuring a bolt, nut, and spring, where a locking part on the bolt prevents rotation relative to the nut, and snap-fit members secure the bolt in place, eliminating the need for adhesives and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking thread sleeve is threaded to the bolt to prevent loosening, then the bolt loosening is prevented, but the device complexity and installation difficulty increase
Solution Approach 1:
The locking function is merged into the bolt structure itself through the locking protrusion that engages with the groove on the mounting plate, eliminating the need for a separate locking thread sleeve. This integration reduces the number of components while maintaining the anti-loosening function.
Solution Approach 2:
The locking function is extracted from a separate component (locking thread sleeve) and incorporated directly into the bolt design through the locking protrusion feature, simplifying the overall connection assembly while preserving the reliability of bolt fixation.
2Reliability
If adhesive is filled in the gap between bolt and locking thread sleeve to prevent rotation, then the bolt rotation is prevented, but the manufacturing cost increases
Solution Approach 1:
The chemical bonding method (adhesive) is replaced with a purely mechanical locking mechanism where the locking protrusion on the bolt engages with the groove on the mounting plate. This mechanical interlock prevents bolt rotation and loosening without requiring any adhesive materials or additional curing processes.
Solution Approach 2:
The design uses simple, inexpensive mechanical features (protrusion and groove) instead of expensive adhesives. The locking mechanism is achieved through basic metalforming operations that create the protrusion and groove, which are far less costly than purchasing and applying specialized locking adhesives.
3Reliability
If adhesive is used to bond bolt and locking thread sleeve, then the bolt is secured, but the installation difficulty increases
Solution Approach 1:
The chemical bonding process (adhesive application and curing) is completely replaced with a simple mechanical engagement system. The locking protrusion on the bolt fits into the groove on the mounting plate, providing immediate mechanical fixation without requiring adhesive application, waiting for curing, or complex installation procedures.
Solution Approach 2:
The locking protrusion and groove are pre-formed during manufacturing, so that during installation the bolt simply needs to be inserted and rotated into position where the protrusion automatically engages with the groove. This preliminary preparation of locking features eliminates the need for on-site adhesive application and curing time.
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 effectively prevents bolt loosening and rotation, reducing costs and simplifying the installation process while maintaining secure electrical contact.
Implementation Method 1
a spring compressed between a head of the first bolt and the pressing plate
Data Source
AI summary
A loading assembly includes a base plate configured to support a circuit board placed thereon, a pressing plate configured to press an electrical member on the circuit board, and a first connection assembly connecting the pressing plate to the base plate and pressing the electrical member on the circuit board through the pressing plate. The first connection assembly includes a first nut fixed on the base plate, a first bolt passing through the pressing plate and screwed to the first nut, and a first spring sleeved on the first bolt and compressed between a head of the first bolt and the pressing plate. A first locking part is formed on the first bolt. The first locking part is pressed against an end face of the first nut when the first bolt is screwed to an installation position to prevent the first bolt from being rotated relative to the first nut.