Road Paver Retention Element Overload Protection
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Solution Overview
Problem
Road construction machines, such as pavers and feeders, face maintenance challenges due to the frequent destruction of material retention devices under tensile and compressive forces during material transfer, leading to increased maintenance times and costs.
Innovation Solution
The implementation of an overload protection device for the material retention device, which detaches from the hopper in a non-destructive manner when excessive forces are applied, allowing for easy reattachment and reuse of the retention element without replacing it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the retention element is made elastic to allow transport vehicle contact, then the material transfer is enabled, but the retention element is destroyed under excessive forces
Solution Approach 1:
The fastening device is divided into two independent parts: the retention element (elastic band) and the fastening mechanism (screw, nut, washer). This segmentation allows the retention element to be replaced independently when damaged, while the fastening mechanism remains intact and reusable on the material hopper.
Solution Approach 2:
The retention element is designed as a consumable part that can be discarded when damaged by excessive forces, while the fastening device (screw, nut, washer) is recovered and reused. This principle resolves the contradiction by allowing the elastic retention element to be replaced without replacing the entire fastening system.
2Reliability
If the retention element is firmly fastened to prevent material loss, then material retention is improved, but the retention element cannot be easily replaced when damaged
Solution Approach 1:
The fastening system is segmented into the retention element and the fastening mechanism, allowing the retention element to be independently removed and replaced. The fastening mechanism remains firmly attached to the material hopper, providing stable material retention while enabling easy replacement of the retention element.
Solution Approach 2:
The fastening device incorporates a dynamic fastening mechanism (screw and nut) that can be easily adjusted and removed, allowing the retention element to be firmly secured during operation but quickly replaced when needed. This provides both strong retention and easy maintenance.
3Ease of repair
If the retention element is designed to be replaceable, then maintenance is simplified, but the fastening device complexity increases
Solution Approach 1:
The fastening device is segmented into a simple, reusable fastening mechanism (screw, nut, washer) and a replaceable retention element. This segmentation achieves easy replaceability of the retention element while keeping the fastening device structure simple and standardized.
Solution Approach 2:
The fastening device uses standardized, universal components (screw, nut, washer) that can be easily assembled and disassembled. This universal design simplifies the fastening device structure while enabling easy replacement of the retention element, as the same fastening mechanism can secure any retention element.
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 solution reduces the frequency of retention element replacements, saving time and costs by enabling the retention element to be reused and refastened, while preventing damage and destruction, thus simplifying maintenance and operation of road construction machines.
Implementation Method 1
the retention element is designed elastically, such that it may be deformed by a colliding part of the transport vehicle and can be pushed or bent to the side
Implementation Method 2
the material retention device has an overload protection device, which is designed in such a way that in the event of an applied overload the retention element comes off of the material hopper and the fastening device
Data Source
AI summary
A road paver or a feeder with a machine frame, a travel carriage powered by a drive unit, and a material hopper with a material retention device arranged in the front in the operating direction, the material retention device comprising a fastening device and a retention element fastened to the material hopper through the fastening device, the material retention device having an overload protection device, which is designed in such a way that in the event of an overload applied thereto the retention element is detached the from material hopper and the fastening device, the latter remaining on the hopper, without damage. A material retention device of such a road paver or feeder and a method for protecting a material retention device of such a road paver or feeder.