Street Cleaner Suction Unit Rear Wall Mounting
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Solution Overview
Problem
Existing self-propelled sweeping machines face inefficiencies in refuse collection and noise emissions due to suboptimal design of the suction air flow system, leading to reduced operational time and increased noise levels.
Innovation Solution
The suction air unit is repositioned to the outer face of the rear wall of the refuse collection container with an internal sliding surface, and an air outlet line is connected to the screening device, optimizing airflow and reducing noise by preventing sudden cross-sectional alterations and blockages, while maintaining the same external contours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the suction air unit is arranged inside the refuse collection container, then the airflow path is direct, but the usable volume of the container is reduced and noise emissions increase
Solution Approach 1:
The suction air unit is extracted from the interior of the refuse collection container and relocated to the outer face of the rear wall. This extraction eliminates the space occupation inside the container, maximizing the usable volume for refuse storage while maintaining the airflow generation function outside the container.
Solution Approach 2:
An air outlet line is introduced as an intermediary component to connect the suction air unit (located outside) to the refuse collection container interior. This intermediary conduit enables the airflow to reach the container without requiring the suction unit to be positioned inside, thus resolving the volume-loss problem while maintaining functional connectivity.
2Object-affected harmful factors
If the suction air unit is positioned centrally in the upper part of the container, then the airflow distribution is improved, but the noise emissions increase and the container design becomes more complex
Solution Approach 1:
The suction air unit is extracted from the container interior and positioned on the outer face of the rear wall. This spatial separation removes the noise source from the enclosed container space, reducing noise emissions while allowing the airflow to still effectively reach the refuse through the air outlet line.
Solution Approach 2:
The airflow path is extended into a third dimension by using a longitudinal air outlet line that runs along the length of the container. This dimensional extension allows uniform airflow distribution throughout the container volume without requiring the suction unit to be positioned centrally above the refuse.
3Ease of manufacture
If the container design includes sudden cross-sectional alterations, then the structural design is simplified, but dust and water deposition increases
Solution Approach 1:
The air outlet line is designed with a gradually changing cross-section rather than sudden alterations. This curved, progressive transition in the conduit geometry prevents turbulence and minimizes the deposition of dust and water, while still allowing for practical manufacturing implementation.
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 design enhances the usable volume of the refuse collection container, reduces noise emissions, and extends the operational time before emptying, while ensuring uniform distribution and minimizing dust and water deposition.
Implementation Method 1
suction air unit comprising a suction air blower or the like, by a suction device
Implementation Method 2
the inner face of the rear wall of the refuse collection container is configured as a sliding surface which rises, respectively is inclined, to the rear
Data Source
AI summary
A self-propelled sweeping machine, having a chassis comprising at least one driven drive axle with wheels, for cleaning drivable, preferably solid, ground surfaces such as roads, streets, paths and cycle paths, squares or the like, consists of a refuse collection container which is built onto the chassis for receiving refuse which is lifted from the ground surface by means of generated suction air and/or suction force of a suction air unit comprising a suction air blower, by a suction device provided at the front end of a suction air line, and which is supplied via the connected, preferably rising, suction air line to the interior of the refuse collection container, wherein the refuse collection container has a screening device which is arranged spaced apart from the upper container wall for separating the refuse and, for conducting the suction air, has a downstream air outlet line for the suction air to be discharged, and wherein for the emptying process the refuse collection container is configured at the rear end so as to be pivotable about a horizontal axis arranged transversely to the forward direction of movement, and for emptying refuse the inner face of the rear wall of the refuse collection container is configured as a sliding surface which rises, respectively is inclined, to the rear, wherein the suction air unit, which is line-connected by a suction air opening to the interior of the refuse collection container, is arranged on the outer face of the rear wall of the refuse collection container configured with an internal sliding surface.