Header Box Cap With Retaining Lug for Compact Manual Mounting
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Solution Overview
Problem
Existing caps for heat exchanger header boxes are too bulky for compact cooling units, difficult to manually install due to space constraints, and lack secure retention during draining or degassing operations.
Innovation Solution
A cap design featuring an elastically deformable retaining lug on the shank, which allows secure retention in an intermediate position within the header box opening, enabling easy installation and preventing cap escape during operation, combined with a helical thread and rotational locking pin for quarter-turn mounting and secure sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the cap is designed to be compact to fit in new water boxes, then the space requirement is reduced, but the cap becomes difficult to manually install and operate
Solution Approach 1:
The cap is divided into distinct functional segments: a head portion for operation, a shank for mounting, and an elastically deformable retaining lug for securement. This segmentation allows each part to be optimized independently - the head can be sized for manual operation while the retaining lug provides secure retention in the compact design
Solution Approach 2:
The retaining lug is designed to be elastically deformable, transitioning between a retained position during normal operation and a released position during installation/removal. This dynamic property enables automatic securement once installed, eliminating the need for bulky manual retention mechanisms
2Reliability
If the cap is designed with secure retention features to prevent escape during draining or degassing, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The elastically deformable retaining lug automatically secures itself to the water box opening upon installation. The elastic deformation creates a self-locking mechanism that prevents cap escape during draining or degassing operations without requiring additional active retention components or complex locking mechanisms
Solution Approach 2:
The retaining lug utilizes elastic deformation as a key parameter change to achieve retention. By changing the physical state of the lug from deformed during installation to recovered during operation, the design achieves secure retention through material property changes rather than complex mechanical structures
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 cap design facilitates easy installation and secure retention in compact spaces, allowing for efficient draining and degassing while preventing cap escape, enhancing usability and safety.
Implementation Method 1
a retaining lug, in particular elastically deformable, arranged to retain the cap in an opening of the header box in an intermediate position of the cap
Data Source
AI summary
A cap (20) for a header box of a heat exchanger (1), in particular for a motor vehicle, in particular a radiator, is disclosed. This cap includes a head (21), a shank (22) comprising at least one mounting thread (23), this shank being between the head and a free end of the cap, a retaining lug (30), in particular elastically deformable, arranged to retain the cap in an opening (10) of the header box in an intermediate position of the cap, in which position the cap leaves a clear passage while being retained in the opening, this retaining lug being formed on the shank.