Electric Hammer Barrel Cover Segmentation and Ridge Groove Fixing
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Solution Overview
Problem
The existing electric hammer designs face usability issues due to heat conduction from the metal barrel during operation and require complex and costly disassembly procedures for maintenance, as the barrel cover needs to be removed in multiple parts, complicating repair and increasing labor time.
Innovation Solution
A divided barrel cover system with a cylindrical front cover and rear cover, where the front cover is fixed using a ridge and groove mechanism, and the rear cover has a larger diameter for independent attachment and detachment, allowing for simpler assembly and disassembly, and improved sealing with an overlapping seal member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-piece barrel cover is used to cover the entire barrel, then the sealing and protection are improved, but the disassembly and assembly time and labor increase significantly when repair is needed
Solution Approach 1:
The barrel cover is divided into two separate covers: a front cover that covers the front part of the barrel and a rear cover that covers the rear part. The rear cover can be independently removed for repair work without requiring removal of the entire barrel cover or disassembly of front components. This segmentation allows maintenance personnel to access the striking mechanism quickly by removing only the rear cover, significantly reducing disassembly and assembly time while maintaining protective and sealing functions.
2Productivity
If the barrel cover is divided into front and rear covers to reduce disassembly time, then the maintenance efficiency is improved, but the structure becomes more complex and cost increases
Solution Approach 1:
The barrel cover is segmented into front and rear covers that can be independently assembled and disassembled. The rear cover is designed to be removable without affecting the front cover or requiring disassembly of mounting portions, thereby simplifying the maintenance process while adding minimal structural complexity.
Solution Approach 2:
The front cover is designed with rotatably fitted ridges that can dynamically adjust during assembly and disassembly operations. The ridges fit into grooves on the barrel and can rotate to facilitate easier attachment and detachment of the front cover, reducing the complexity of fixing mechanisms while maintaining secure attachment during operation.
3Ease of operation
If the front cover is made rotatable to facilitate assembly and disassembly, then the ease of operation is improved, but the reliability of fixation may be compromised
Solution Approach 1:
The front cover incorporates ridges that are rotatably fitted into grooves on the barrel. During assembly, the ridges can rotate to align with the grooves, facilitating easy attachment. Once assembled, the ridges maintain secure engagement within the grooves, ensuring reliable fixation during operation. The rotational capability is utilized only during assembly/disassembly, while the fixed engagement ensures operational reliability.
Solution Approach 2:
The ridges are designed with preliminary positioning features that guide them into the grooves before final engagement. This beforehand alignment ensures that the ridges are properly positioned and cushioned into place, preventing misalignment or improper fixation while maintaining ease of assembly through the rotational fitting mechanism.
Data Source
AI summary
PROBLEM TO BE SOLVED: To fix a front cover in a simple and reasonable manner. MEANS OF SOLVING THE PROBLEM: In an electric hammer 1, ridges 34 are provided in an outer surface of a barrel 8, grooves 33 are provided in an inner surface of a front cover 31, and rotation of the front cover 31 with respect to the barrel 8 is prevented by fitting the ridges 34 in the grooves 33. A flange 35, which is latched on a stepped portion 37 provided in front of the ridges 34 and the grooves 33 in the inner surface of the front cover 31, is provided in a peripheral edge of a lock ring 28, and forward movement of the front cover 31 is restricted by latching the flange 35 on the stepped portion 37.