Hammer Gun Handle Device Using Composite Metal Sleeve and Plastic Body
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Solution Overview
Problem
Current handle devices for hammer guns made of metal are difficult to manufacture due to processing challenges and are heavy, leading to high material costs and operator fatigue during extended use.
Innovation Solution
A handle device comprising a metal tubular sleeve connected immovably to a plastic handle body, where the tubular sleeve is threaded to the barrel and the handle body includes a grip portion with air passages, reducing the need for additional processing and distributing weight more evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the handle device is made entirely of metal, then the structural strength is sufficient, but the manufacturing complexity and cost increase significantly
Solution Approach 1:
The handle device uses a composite structure combining metal tubular sleeve (for strength and air inlet function) and plastic handle body (for ease of manufacturing and weight reduction). The metal sleeve provides structural integrity while the plastic body is easily molded into complex shapes with integrated air passages, resolving the contradiction between strength requirements and manufacturing complexity.
Solution Approach 2:
The handle device is divided into two distinct segments: a metal tubular sleeve and a plastic handle body. This segmentation allows each component to be optimized for its specific function - the metal sleeve for structural strength and air flow, and the plastic body for ease of manufacturing and ergonomic design - while being assembled together to form the complete handle device.
2Strength
If the handle device is made entirely of metal, then the structural strength is sufficient, but the production time and material cost increase
Solution Approach 1:
By using composite materials (metal sleeve + plastic body), the production process benefits from different manufacturing methods optimized for each material. The metal sleeve can be produced by conventional metalworking while the plastic body is molded in one piece, significantly reducing production time compared to machining the entire handle device from metal, while maintaining structural strength through the metal component.
Solution Approach 2:
The air passages and mounting holes are pre-formed during the plastic molding process rather than requiring subsequent machining operations. This preliminary action of creating features during the primary manufacturing process eliminates time-consuming post-processing steps and reduces overall production time while maintaining the required structural integrity.
3Reliability
If the handle device is made entirely of metal, then the durability is high, but the weight increases causing operator fatigue
Solution Approach 1:
The composite structure combines metal (for durability and strength) with plastic (for weight reduction). The metal tubular sleeve provides the necessary durability and structural support, while the plastic handle body significantly reduces the overall weight of the handle device, eliminating operator fatigue while maintaining high durability through the metal component.
Solution Approach 2:
Different materials are applied to different parts of the handle device based on local requirements: metal is used where strength and durability are critical (tubular sleeve for air inlet and structural support), while plastic is used where weight reduction is beneficial (handle body for gripping). This local quality approach optimizes the weight-strength-durability balance.
Data Source
AI summary
A handle device for a hammer gun includes a tubular sleeve and a handle body. The tubular sleeve is adapted to connect threadedly with a barrel of the hammer gun, and includes front and rear end faces, a peripheral wall interconnecting the front and rear end faces, an installing cavity extending from the front end face toward the rear end face and adapted to receive therein the barrel of the hammer gun, and a retaining portion provided on the peripheral wall. The handle body has a grip portion, and a casing portion molded directly over the tubular sleeve and engaging the retaining portion so that the tubular sleeve is connected immovably to the handle body.