Garden Tool Insert Device With Segmented Housing
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Solution Overview
Problem
Existing garden insert tool devices for portable machine tools lack a drive unit, making them cumbersome to exchange and increasing the risk of operator injury during tool changes, and they often require direct handling of the insert tool unit.
Innovation Solution
A garden insert tool device with a housing comprising two interconnected shell elements that are detachably connected, allowing for easy removal from a portable power tool, and a drive connection unit that transmits drive forces and torques from the portable machine tool to the insert tool unit without a direct drive unit, enabling safe and convenient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the garden tool attachment is designed without a drive unit to minimize dimensions, then the device complexity is reduced and the attachment can be compactly mounted on the portable machine tool, but the operator must directly grasp the tool unit for tool changes, increasing the risk of operator injury
Solution Approach 1:
The housing is divided into two separable shell elements that can be detached from each other. This segmentation allows the operator to grasp and manipulate the housing shells during tool changes rather than directly handling the tool unit with cutting elements, thereby reducing injury risk while maintaining the compact drive-unit-free design
Solution Approach 2:
The housing shells serve as an intermediary between the operator and the tool unit. By providing a protective barrier and grip interface, the housing shells mediate the interaction between the operator and the dangerous cutting elements, allowing safe handling without direct contact with the tool unit
2Device complexity
If the housing is designed as a single integrated piece to simplify structure, then the device complexity is reduced, but maintenance and repairs become difficult as the housing is not easily accessible
Solution Approach 1:
The housing is segmented into two shell elements that can be detached from each other using fastening elements. This segmentation maintains structural simplicity while enabling easy access to the tool unit and internal components for maintenance and repairs
Solution Approach 2:
The housing transitions from a static integrated structure to a dynamic separable structure. The shell elements can be joined during operation for structural integrity and separated during maintenance for accessibility, adapting to different operational states
3Ease of operation
If the housing shell elements are detachably connected to allow easy removal and maintenance, then the ease of operation is improved, but the device complexity increases due to the need for fastening elements
Solution Approach 1:
The housing is segmented into detachable shell elements connected by fastening elements. This segmentation enables easy removal and installation of the housing for tool changes and maintenance, with the fastening elements providing a simple mechanical connection that balances ease of operation with minimal added complexity
Data Source
Figure 1~2
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Figure 5~6
AI summary
The device has a tool insert unit (14a) that comprises a cutting element (18a) which is movably mounted in the housing (16a), and freely arranged on a drive connection unit. The drive connection unit includes a drive connection element that is rotatably mounted in the housing. The drive connection element is connected with the cutting element of the tool insert unit. An eccentric is arranged in the drive connection unit. A coupling unit (26a) has a pair of coupling element (28a,32a) that is located on a tool holder (36a) in the housing. An independent claim is included for a garden machine tool system.