Transport Trolley Roller Unit Mounting Device with Anti-Rotation Clamp
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Solution Overview
Problem
Existing fastening devices for roller units on transport vehicles are inefficient due to the need for torque wrenches, leading to noise and vibration during assembly, and are hindered by paint residues and manufacturing tolerances in threaded holes.
Innovation Solution
A fastening device featuring hollow profile fastening elements with elongated groove-shaped recesses and a screw/nut combination, where either the screw or nut part has a securing component to prevent rotation, allowing for pre-assembly and easy, low-noise assembly without additional tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If torque wrenches are used to tighten fastening screws, then adequate attachment to the chassis is ensured, but noise and vibration emissions increase for assembly personnel
Solution Approach 1:
The patent replaces the traditional torque wrench (mechanical tool requiring high force) with a simple screwdriver operation. The mechanical advantage is shifted to the clamp mechanism itself, which uses leverage to apply sufficient clamping force without requiring the assembly personnel to use a torque wrench, thereby eliminating noise and vibration emissions while maintaining attachment reliability
Solution Approach 2:
The fastening system is designed to be self-servicing through the clamp mechanism that automatically applies sufficient clamping force when the screw is tightened with a simple screwdriver. The system self-regulates the clamping force through its mechanical design, eliminating the need for external torque control tools and reducing harmful emissions to assembly personnel
2Reliability
If threaded holes are made in the chassis for screw fixation, then the mounting plate can be securely attached, but paint residues accumulate in the holes from surface treatments and blasting treatments
Solution Approach 1:
The patent extracts the threaded hole requirement from the chassis by using a clamp mechanism that attaches to the chassis surface without requiring threaded holes. The clamp mechanism is fastened to the mounting plate instead, eliminating the need for threaded holes in the chassis and thereby preventing paint residue accumulation in such holes
Solution Approach 2:
The patent introduces a clamp mechanism as an intermediary component between the chassis and the mounting plate. This intermediary attaches to the chassis through surface contact rather than threaded holes, and connects to the mounting plate through a separate fastening system, thereby eliminating the direct connection that would require threaded holes and prevent paint residue issues
3Reliability
If traditional fastening screws are used for the mounting plate, then secure attachment is achieved, but assembly time increases due to the need for torque wrenches and proper tightening procedures
Solution Approach 1:
The patent replaces the complex torque wrench tightening procedure with a simple screwdriver operation on the clamp mechanism. The mechanical design of the clamp provides self-regulating clamping force, eliminating the need for precise torque control and reducing assembly time while maintaining attachment security
Solution Approach 2:
The patent segments the fastening function into two independent parts: the clamp mechanism that provides the clamping force, and the screw connection that secures the clamp to the mounting plate. This segmentation allows the clamp to be positioned and adjusted independently, then secured with a simple screwdriver operation, reducing overall assembly time while maintaining security
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The mounting device has a storage device (4) with wall openings (10a, 10b and 11a, 11b) for roller units (5) having fasteners (9a, 9b). The fasteners are arranged adjacent to the wall through hole openings with long channels (12a, 12b). The width of the channels is smaller than the diameter of the holes with mounting elements arranged with a mounting plate (8). Screws (13) are mounted with a corresponding nut part (14) which has a backup element arranged against a twist part of the bolt.