Hand Power Tool Drum Magazine Braking Device
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Solution Overview
Problem
Existing hand power tools with drum-type tool change magazines face issues where tools can slip out or be ejected forcefully from the tool receiver during sliding, leading to potential damage or injury and discomfort in use.
Innovation Solution
A braking device is integrated into the hand power tool, featuring an elastically deformable sleeve with a hook-shaped end region made of elastomer, such as rubber, to generate a braking frictional force and prevent tool ejection, ensuring safe and reliable tool transfer between the tool chamber and the tool receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a drum-type tool change magazine is used with a slide-over element for tool transfer, then tool change capability is improved, but tool ejection risk increases due to abrupt actuation
Solution Approach 1:
A braking device is introduced as an intermediary element between the tool chamber and the tool receiver. This braking device includes a braking member with a friction region that applies controlled frictional force to the tool during sliding, preventing abrupt movements and tool ejection while enabling smooth tool transfer.
Solution Approach 2:
The braking device is positioned to engage with the tool before the tool fully enters the tool receiver. The friction region of the braking member applies gradual braking force during the sliding process, cushioning the tool against abrupt deceleration and preventing ejection from the inner receiver.
2Reliability
If the braking member has a small inner diameter friction region, then braking effectiveness is improved, but tool wear increases
Solution Approach 1:
The braking member is designed with an annular friction region having a specific inner diameter that is smaller than the outer diameter of the tool. This parameter configuration ensures effective braking contact while distributing the frictional force over an annular area, reducing localized wear on the tool surface.
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
The braking device effectively reduces the risk of tool ejection, enhancing user safety and comfort by providing a stable and inexpensive solution to prevent tools from slipping out during sliding operations.
Implementation Method 1
the braking device has a braking member that is elastically deformable, at least regionally
Implementation Method 2
the braking member has a hook-shaped end region for generating a braking frictional force on the tool
Data Source
AI summary
A hand power tool has a tool receiver which is configured to receive a tool and which has an inner receiver. The tool receiver is provided on an associated tool housing, in which there is disposed a drum-type tool change magazine having at least one tool chamber for storing the tool. The tool chamber is configured to be aligned so as to be flush with the inner receiver to enable the tool to slide from the tool chamber into the inner receiver or from the inner receiver into the tool chamber. A braking device is configured to brake the tool as the tool slides from the tool chamber into the inner receiver.