Hammer Head Joint Structure to Prevent Handle Detachment
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Solution Overview
Problem
Conventional tool hammers suffer from loosening and detachment of the hammer head from the handle due to long usage, leading to operational deviations and safety risks.
Innovation Solution
A tool hammer design featuring a tapering hole in the hammer head, a straight hole in the handle, a positioning block with concave grooves, and a fixing member secured by a filler unit, enhancing the connection strength between the hammer head and handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional hammer head and handle combination is used, then the structure is simple and easy to manufacture, but the connection loosens and detaches after long usage
Solution Approach 1:
The connection structure is divided into multiple functional components: a positioning block with concave filling grooves for precise positioning, a fixing member for mechanical fastening, and a filler unit for material bonding. This segmentation allows each component to perform its specific function while collectively providing robust connection stability that prevents loosening and detachment after long usage.
Solution Approach 2:
The positioning block is inserted into the tapering hole of the hammer head, with the fixing member passing through both the positioning block and the handle. The filler unit fills the tapering hole, straight hole, and concave filling grooves, creating a nested structure where multiple components are integrated within each other to form a unified, stable connection.
2Reliability
If a simple hammer head and handle connection is used, then the manufacturing cost is low, but the hammer head detaches during strikes causing safety risks
Solution Approach 1:
The positioning block is pre-positioned in the tapering hole with its concave filling grooves aligned to receive the filler unit. The fixing member is pre-configured to pass through both the positioning block and the handle, creating a pre-assembled connection structure that ensures safety before the hammer is put into service, preventing detachment during strikes.
Solution Approach 2:
The connection structure combines multiple materials and bonding methods: the filler unit provides material bonding to fill and secure the positioning block and fixing member, while the fixing member provides mechanical fastening. This composite approach creates a multi-layered connection system that ensures safety and prevents detachment, outweighing the increased manufacturing complexity.
3Ease of operation
If the hammer head and handle are loosely connected, then assembly is easy, but the hammering direction and force deviate during use
Solution Approach 1:
The tapering hole in the hammer head has a radial cross-sectional area that is larger than the straight hole in the handle, creating an asymmetric connection structure. The positioning block with its concave filling grooves further asymmetrically positions the fixing member, ensuring precise alignment and control of the hammer head relative to the handle, thereby maintaining accurate hammering direction and force.
Solution Approach 2:
The positioning block acts as an intermediary component between the hammer head and handle, with its concave filling grooves providing precise positioning. The fixing member serves as another intermediary that mechanically fastens the positioning block to the handle. These intermediary components work together to eliminate looseness and ensure precise control of the hammer head during operation.
Data Source
AI summary
A tool hammer includes a hammer head, a handle, a positioning block, a fixing member, and a filler unit. The hammer head has a tapering hole on the top and a straight hole on the bottom. The handle has a combination part received in the straight hole. The positioning block is disposed in the tapering hole. Two corresponding sides of the positioning block are formed in a tapering shape and provided with a concave filling groove. The fixing member orderly passes through the positioning block and the combination part, so that the bottom face of the positioning block abuts against the top face of the combination part. The filler unit is filled in the tapering hole, the straight hole, and the filling groove. The combination strength between the hammer head and the handle is improved, effectively preventing detachment, enhancing durability and service life of the tool hammer.