Angle Grinder Bearing Layout for Compact Ergonomic Housing
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Solution Overview
Problem
Existing hand-held power tools are bulky and lack ergonomic design, limiting their usability and compactness.
Innovation Solution
A hand-held power tool design featuring a bearing unit that protrudes into a first housing part, allowing for a more compact drive unit configuration, enhanced ergonomics, and flexible housing design, with a bearing unit that is cantilever-mounted and surrounded by the housing to facilitate precise alignment and cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bearing unit is arranged conventionally within the second housing part, then the drive unit can be mounted, but the power tool becomes bulky and ergonomics are reduced
Solution Approach 1:
The bearing unit is positioned to protrude into the first housing part (transmission housing) from the second housing part (motor housing), utilizing the axial dimension between the two housing parts. This dimensional repositioning allows the drive unit to be mounted more compactly along the axial direction, reducing the overall radial volume of the power tool while maintaining ergonomic grip proportions.
2Volume of moving object
If the bearing unit protrudes into the first housing part, then compactness and ergonomics are improved, but the alignment precision and mounting complexity increase
Solution Approach 1:
A bearing cap serves as an intermediary component between the bearing unit and the first housing part. The bearing cap simplifies the mounting process by providing a pre-formed interface that ensures proper alignment and positioning of the bearing unit within the first housing part, thereby reducing the alignment precision requirements for the housing parts themselves.
3Ease of operation
If the drive unit is displaced further into the first housing part, then the second housing part can be designed more flexibly for ergonomics, but the structural stability may be compromised
Solution Approach 1:
The housing is divided into two separate parts: the first housing part (transmission housing) and the second housing part (motor housing). This segmentation allows the drive unit to be displaced into the first housing part while the second housing part maintains its structural integrity and provides flexible ergonomic design for the grip region. The two housing parts work together to maintain overall structural stability.
Data Source
AI summary
A hand-held power tool, in particular an angle grinder, includes a drive unit, a machine housing, in particular having a first housing part, which is designed as a transmission housing, and a second housing part, which surrounds the drive unit, and a bearing unit, in particular a bearing housing, for supporting the drive unit. The bearing unit protrudes into the first housing part.