Hand-held Power Tool Holder Composite Base Body
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Solution Overview
Problem
Hand-held chisel tool holders face mechanical stress and heat generation due to repetitive dynamic loads and abrasive wear during demolition work, leading to potential damage and discomfort.
Innovation Solution
A tool holder with a base body composed of a metal frame embedded in a plastic body, featuring perforated sleeves and guide rails for improved mechanical stability and heat dissipation, along with a locking mechanism for secure tool retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal base body is used to provide mechanical stability, then strength and stability are improved, but heat accumulation increases due to poor heat dissipation
Solution Approach 1:
The base body is constructed as a composite structure with a metal frame (providing strength) embedded in a plastic body (providing heat dissipation). This composite design allows the metal components to maintain mechanical stability while the plastic material helps dissipate heat, preventing excessive temperature buildup during operation.
2Strength
If the base body is made from solid metal to withstand mechanical loads, then strength is improved, but weight increases
Solution Approach 1:
The tool holder base body uses a composite construction where a metal frame (optimized for strength) is embedded in a lighter plastic body. This allows the structure to withstand mechanical loads while significantly reducing the overall weight compared to a solid metal construction, improving user comfort during operation.
Solution Approach 2:
The base body is segmented into functional components: a metal frame structure for strength and stiffness, and a plastic body for weight reduction and heat dissipation. This segmentation allows each material to be used where it provides the most benefit, optimizing the strength-to-weight ratio.
3Reliability
If locking bodies are made of metal to ensure secure locking, then reliability is improved, but heat conduction to the tool increases
Solution Approach 1:
The locking bodies are positioned within the plastic body rather than being exposed metal components. This local arrangement ensures that the metal locking mechanism maintains its reliability for securing the tool, while the surrounding plastic material acts as a thermal barrier, preventing heat from being conducted to the locked tool.
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 mechanical stability and heat management, reducing wear and temperature buildup, thus extending tool life and user comfort during intense use.
Implementation Method 1
The base body is formed from a metal frame with at least one perforated sleeve and a plastic body in which the metal frame is embedded
Implementation Method 2
The perforation improves the embedding in the plastic. Sections of the cage preferably lie flat against the sleeve in order to improve heat exchange.
Data Source
Figure 1~2
Figure 3~6
AI summary
The tool holder (2) according to the invention for a hand-held power tool has a main body (18), one or more locking bodies (21), and an actuation ring (22) which is arranged movably on the main body (18) between a locking position and an unlocking position. The main body (19) has a receiving space (20) for receiving a tool (3). The locking bodies (21) are arranged lying in radial openings (23) of the main body (18). In the locking position, the actuation ring (22) enforces an engagement of the locking bodies (21) with the receiving space (20) and, in the unlocking position, it releases the enforced engagement of the locking bodies (21) with the receiving space (20). The main body (18) is formed from a metal framework (27) with at least one perforated sleeve (28) and a plastic body in which the metal framework (27) is embedded.