Suction-extraction device for a demolition hammer
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Solution Overview
Problem
Existing suction-extraction devices for demolition hammers are prone to falling or becoming obstructed, leading to reduced visibility of the chisel edge and increased risk of damage, especially during heavy demolition work, and are often rendered ineffective by wear.
Innovation Solution
A suction-extraction device with a flexible suction hose that can be mounted on the demolition hammer housing at a fastening point spaced from the free end, allowing the suction body to pivot radially, and featuring a retaining clip with an adjustable eye for secure attachment and adjustable position relative to the chisel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suction body is fitted over the demolition chisel, then dust extraction is achieved, but the suction body falls down and can be destroyed, and visibility of the chisel edge is restricted
Solution Approach 1:
The suction body is extracted from the chisel surface and repositioned to the housing. The suction hose connects the suction body to the vacuum source, separating the suction function from the chisel itself. This eliminates the interference with chisel visibility while maintaining dust extraction capability.
Solution Approach 2:
The housing serves as an intermediary structure to mount the suction body. Instead of attaching directly to the chisel, the suction body is mounted on the housing at a fastening point, using the housing as a mediator that provides stable attachment without interfering with the chisel's working area or visibility.
2Reliability
If the suction body is fitted over the demolition chisel, then dust extraction is achieved, but the suction body slips down with increasing wear of the chisel
Solution Approach 1:
The suction body is extracted from dependency on the chisel for attachment. By mounting on the housing instead, the suction body's attachment stability becomes independent of chisel wear, ensuring continuous reliable operation throughout the chisel's service life and beyond.
Solution Approach 2:
Instead of attaching the suction body to the consumable chisel that wears down, the attachment is inverted to the durable housing that does not wear. This reverses the attachment relationship from chisel-dependent to housing-dependent, solving the slip-down problem.
3Reliability
If the suction body is fitted over the demolition chisel, then dust extraction is achieved, but the suction body can be destroyed during chiseling over edges or into extracted material
Solution Approach 1:
The suction body is extracted from the hazardous zone near the chisel tip where it would contact edges and extracted material. By positioning it on the housing, the suction body is removed from the danger area while the chisel maintains full flexibility for demolition work.
Solution Approach 2:
The dust extraction system is segmented into separate functional zones: the chisel performs demolition work in the working region, while the suction body performs dust extraction from a safe distance on the housing. This spatial segmentation protects the suction body from damage while maintaining operational effectiveness.
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
Ensures continuous dust extraction and enhanced user safety by maintaining visibility of the chisel edge and preventing the suction body from slipping or being damaged, even during wear, thereby ensuring safe and effective operation.
Implementation Method 1
Dust can be sucked up from a working region of the demolition chisel via the suction body
Data Source
AI summary
Suction-extraction device for a demolition hammer, wherein the demolition hammer has a housing and a tool fitting for receiving a demolition chisel, wherein the suction-extraction device has a flexible suction hose on whose free end there is connected a suction body via which dust is to be sucked up from a working region of the demolition chisel, wherein the suction-extraction device has a fastening element by which the suction hose can be mounted on the housing of the demolition hammer at a fastening point of the suction hose that is spaced apart from the free end, with the result that, during suction operation, the suction body can be freely pivoted with respect to the demolition chisel, at least in the radial direction.