Pole Sander Dust Extraction Hood for Stable Air Flow
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Solution Overview
Problem
Existing pole sanders face inefficiencies in removing dust and debris from under the hood during operation, which can lead to accumulation and reduced air flow efficiency.
Innovation Solution
A handheld pole sander design featuring a DC brushless motor, planetary gear set, and a flexible dust extraction pipe with optimized air flow paths, along with a brush ring and telescopic elongate body for improved dust removal through suction, and a grounded conductive structure for electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a vacuum cleaner is attached to remove dust from under the hood, then dust removal capability is improved, but air flow efficiency deteriorates due to accumulation
Solution Approach 1:
The invention extracts the dust removal function by providing a vacuum cleaner attachment that connects to the sanding head through a nozzle and pipe system. The vacuum cleaner suction extracts dust and debris from under the hood, separating the harmful dust accumulation from the sanding operation and preventing it from blocking air flow paths.
Solution Approach 2:
The invention introduces a flexible dust extraction pipe as an intermediary component between the sanding head and vacuum cleaner. This pipe serves as a mediator that transports dust particles from the sanding zone under the hood to the vacuum cleaner, enabling efficient dust removal without interfering with the sanding process or air flow through the platen.
2Ease of operation
If the telescopic pole is made adjustable for ease of use, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The telescopic pole is segmented into multiple telescopic sections that can slide relative to each other. Each section is a separate component that can be extended or retracted independently, allowing the pole length to be adjusted to suit different working conditions while maintaining a manageable overall structure.
Solution Approach 2:
The telescopic pole incorporates a dynamic adjustment mechanism with locks and releases that allow the user to easily change the pole length during operation. The mechanism transitions between locked and unlocked states, enabling quick adjustment of the pole to different positions without complex assembly or disassembly procedures.
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
Enhances dust and debris removal efficiency by maintaining high air flow and preventing accumulation, ensuring effective operation and ease of use with adjustable length and easy vacuum attachment.
Implementation Method 1
A vacuum cleaner can be attached to the sanding head, typically via a nozzle which connects to a pipe which extends through the telescopic pole, to remove dust generated by the sanding action of the rotating platen from under the hood
Implementation Method 2
The output spindle and hence the platen, is rotated by an electric motor. The electric motor can be mounted on the sanding head
Implementation Method 3
Sand paper can be attached to the platen for sanding a work surface
Data Source
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AI summary
A handheld pole sander for performing different surface machining treatments including but not limited to sanding, polishing, grinding or rubbing a work surface comprising: an elongate body (102) having two ends; a sanding head (100) attached via a pivot mechanism (110) to a first end of the elongate body (102); an electric motor (114) mounted on the sander; wherein the sanding head (100) comprises: a hood (112) comprising a plate (156) and a sidewall (162) to form a chamber (166); an output spindle (118) having an axis of rotation (126) which projects from the hood (112) into the chamber (166); and a wall (178) mounted on top of the plate which forms a tubular passageway from an aperture (130) formed through the plate (130) to an opening; wherein the electric motor (114), when activated, rotatingly drives the output spindle (118); wherein the elongate body comprises a first passageway (154) which extends through the length of the elongate body and which is used to transport air through the length of the elongate body (102);wherein a flexible pipe (128) connects between a first end of the first passageway at the first end of the elongate body (102) and the opening to connect the chamber (166) to the first passageway; characterised in that the exit of the tubular passage has a fourth angle (412) located in a vertical plane (414) which passes through two axes, a centre axis (400), which is parallel to the axis of rotation (126) of the output spindle but which passes through the centre of the aperture (130) and a second axis (410, which is parallel to the centre axis and which passes through the part of the opening (420) of the tubular passageway located furthest from the axis of rotation of the output spindle; wherein the angle (412) in this plane (414) between the plane (422) of the circular plate (156) of the hood (112) and the direction of the tubular passage (176) in the turning direction (306) of a platen (116) when mounted on the output spindle is between 15 degrees and 50 degrees.