Resin-Filled Mechanical Bond for Striking Head Handle Connection
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Solution Overview
Problem
Hand-held striking tools often suffer from weak bonding between the striking head and handle, leading to reduced durability and strength, which can result in premature failure and safety concerns during use.
Innovation Solution
A striking tool design featuring a resin-filled gap between the handle's mounting portion and the striking head's passage, where the resin interlocks with ribs to create both adhesive and mechanical bonds, enhancing the connection's strength and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional bonding methods are used between striking head and handle, then the tool can be manufactured with simpler processes, but the bonding strength and durability are insufficient leading to premature failure
Solution Approach 1:
The patent employs a composite bonding system combining chemical adhesive bonding with mechanical interlocking. The adhesive material fills the annular space between the handle mounting portion and passage, while ribs on the mounting portion create mechanical interlock features. This composite approach achieves superior bonding strength compared to traditional single-method attachment.
Solution Approach 2:
The mounting portion incorporates ribs that create an interlocking structure with the adhesive material. This ribbed configuration allows the adhesive to mechanically interlock with the handle, creating a reinforced bond that combines chemical adhesion with mechanical interlocking resistance.
2Reliability
If simple attachment structures are used, then manufacturing is easier, but the durability and reliability of the connection deteriorates
Solution Approach 1:
The mounting portion features localized ribs positioned specifically in the annular space where adhesive bonding occurs. This local structural enhancement provides mechanical interlocking precisely where needed for bond strength, while the rest of the handle structure remains simple and easy to manufacture.
Solution Approach 2:
The attachment structure is segmented into distinct functional elements: the handle mounting portion with integrated ribs, the annular adhesive bonding space, and the striking head passage. This segmentation allows each element to be optimized independently while maintaining overall manufacturing efficiency.
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 resin-filled mechanical bond significantly increases the strength and durability of the striking tool's connection, providing a more reliable and long-lasting attachment between the striking head and handle, thereby enhancing user safety and tool performance.
Implementation Method 1
a resin filling a volume between the mounting portion and the passage to provide an adhesive bond between the striking head and the handle
Implementation Method 2
The resin interlocks with the ribs to provide a mechanical bond between the striking head and the handle
Data Source
AI summary
A striking tool includes a striking head, a passage extending through the striking head, and an elongated handle defining a longitudinal axis. The elongated handle has a mounting portion disposed in the passage, and the mounting portion includes a finger and a plurality of ribs extending outwardly from the finger to define a gap between the ribs and an internal wall of the passage. The striking tool further includes a resin filling a volume between the mounting portion and the passage to provide an adhesive bond between the striking head and the handle. The resin interlocks with the ribs to provide a mechanical bond between the striking head and the handle.