Motor Tool Handle Mounting Same Face Attachment
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Solution Overview
Problem
The existing methods for mounting a front handle to a base portion of a hand-held motor-driven tool, such as chain saws, require a lengthy assembly process due to the need for multiple screws and adjustments, increasing assembly time and tool weight.
Innovation Solution
The handle portion is designed with attachment means that allow both ends of the front handle to be mounted on the same face of the base portion, using recesses, protrusions, and cavities to facilitate a stable and quick attachment with fewer screws, reducing assembly time and weight while maintaining stability and cost-efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple screws are used to attach both ends of the front handle to different faces of the base portion, then the attachment is stable and reliable, but the assembly time increases and the tool weight increases
Solution Approach 1:
The patent combines multiple attachment operations into a single face of the base portion. Both the first attachment means (for the first end of the front handle) and the second attachment means (for the second end of the front handle) are arranged to be mounted at the same first lateral face, eliminating the need to turn the tool around and reducing assembly steps
Solution Approach 2:
The base portion is segmented with a recess extending from the second lateral face through a limited portion, creating distinct mounting zones on the same face. This segmentation allows independent attachment of handle ends while maintaining compact structure
2Reliability
If multiple screws are used to attach both ends of the front handle to different faces of the base portion, then the attachment is stable and reliable, but the tool weight increases
Solution Approach 1:
By merging both attachment means onto the same face, the patent reduces the total number of screws required from four (two for each end on different faces) to two (one for each end on the same face), directly reducing tool weight
Solution Approach 2:
The recess structure extracts unnecessary material from the base portion, creating a lightweight yet stable mounting zone that reduces overall tool weight while maintaining attachment reliability
3Ease of manufacture
If the first and second attachment means are mounted on different faces of the base portion, then the attachment process follows traditional methods, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The patent merges both attachment operations to occur on the same face of the base portion, allowing operators to complete both attachments in one positioning operation without reorienting the tool, thereby improving assembly efficiency
Solution Approach 2:
The recess extends from the second lateral face through a limited portion of the base portion, creating a three-dimensional mounting structure that enables both attachment means to be positioned optimally on the same face, improving accessibility and assembly ease
Data Source
AI summary
A handle portion for a hand-held motor-driven tool and a hand-held motor-driven tool including a base portion (20), a rear handle (30) arranged to the rear part (20a) of the base portion (20) and a front handle (40) having a first end (40a) attached to the base portion (20) and a second end (40b) attached to the base portion (20). At least a part of the front handle (40) is arranged as a loop starting from a first lateral face (20c) extending in a direction away from a lower face (20e) of the base portion (20) and further in a direction towards a second lateral face (20d). A first attachment means (12) for attaching the first end (40a) and a second attachment (13) means for attaching the second end are mountable at the same face of the first lateral face (20c), second lateral face (20d) or lower face (20e) of the base portion.