Coupler Buffer Mounting via Push Nut and Double-Headed Stud
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Solution Overview
Problem
Existing coupler buffer device mounting structures face challenges in compact spaces where small-fastening-torque operations are required, as bolts struggle to pass through limited spaces due to small closed cavities, leading to stress concentration and difficulty in dismounting without specialized tools.
Innovation Solution
A mounting structure utilizing a double-headed stud, nut, push nut, and push screws with axial screw holes, where the push screws apply thrusting forces through a hard washer to achieve clamping, reducing fastening torque requirements and allowing for easy disassembly using a raised head on the stud.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a bolt is used to pass from the vehicle body side to the coupler side, then the mounting structure can be simplified, but the bolt cannot pass through due to the small closed space on the vehicle body side
Solution Approach 1:
Instead of passing the fastener from the vehicle body side (which has limited space), the double-headed stud is passed from the coupler side (which has sufficient space) through the vehicle body to the coupler side. This reverses the traditional mounting approach, allowing the fastener to be installed from the accessible side while still securing the device to the vehicle body structure.
2Ease of manufacture
If a bolt passes from the coupler side to the vehicle body side, then the mounting can be completed, but stress concentration occurs at the root of the bolt
Solution Approach 1:
A raised head is pre-formed on the coupler side of the double-headed stud before installation. This preliminary feature allows the stud to be securely retained on the coupler side after passing through the vehicle body, distributing the stress more effectively and preventing stress concentration at the bolt root during both installation and operation.
3Reliability
If a traditional nut and bolt structure is used, then the fastening can be achieved, but the dismounting requires specialized tools and is difficult
Solution Approach 1:
The double-headed stud with its raised head on the coupler side serves as its own retrieval mechanism. During disassembly, the raised head can be engaged by a small wrench or similar tool to back out the stud from the coupler side, eliminating the need for specialized retrieval tools and simplifying the dismounting process while maintaining secure fastening during operation.
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
This configuration enables successful installation of the coupler buffer device in compact spaces with reduced stress concentration and lower fastening torque, while allowing for easy disassembly using a small wrench, ensuring strong clamping force and preventing looseness.
Implementation Method 1
a plurality of push screws screwed into the circumferentially provided axial screw holes of the push nut, wherein the coupler buffer device is clamped and fixed to the vehicle body structure by heads abutting against the coupler buffer device via a hard washer
Implementation Method 2
The small screw adopts a small fastening torque, and a plurality of thrusting forces generated by the small screw act on the hard washer to achieve a strong clamping force
Implementation Method 3
At the same time, these thrusting forces will generate a tensile force of the same magnitude in the combination of the double-headed studs, so as to achieve the installation of the coupler buffer device
Data Source
AI summary
A coupler buffer device mounting structure for small-fastening-torque pushing under a compact space includes a double-headed stud passing through an installation fabrication hole of a vehicle body structure; a nut screwed on a first end of the double-headed stud; a push nut screwed on a second end of the double-headed stud and provided with a plurality of axial screw holes in a circumferential direction; and a plurality of push screws screwed into the circumferentially provided axial screw holes of the push nut, where the coupler buffer device is clamped and fixed to the vehicle body structure by heads abutting against the coupler buffer device via a hard washer. The coupler buffer device mounting structure achieves the passing of the double-headed stud from a coupler side to a vehicle body side by using the double-headed stud, the nut, the push nut and the plurality of push screws in combination.