Open Ring Bearing Mount Radial Access
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Solution Overview
Problem
Hand-held power tools with closed bearing rings in annular bearing mounts restrict radial access to the output member, complicating mounting and drive-side access, and require longer intermediate flanges for positioning.
Innovation Solution
Designing the bearing mount and ring in an open ring shape with recessed sectors and predetermined breaking points allows for insertion and support within the bearing mount, maintaining shape stability and guiding quality, even after the peripheral section is broken out, and providing non-rotatable fixing with grooves and counterparts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a closed bearing ring design is used, then the guiding quality and structural integrity are improved, but radial access to the output member is restricted and mounting options are reduced
Solution Approach 1:
The bearing ring is designed as an open ring structure with a gap that provides radial access to the output member while maintaining the bearing's guiding quality. The open design segments the continuous ring structure, allowing access without compromising the overall structural integrity needed for reliable operation.
2Stability of the object's composition
If a closed bearing ring is used, then shape stability is improved, but internal stresses from manufacturing cause deviations from target shape
Solution Approach 1:
The open ring design with intentional gaps releases internal manufacturing stresses that would otherwise cause distortion in a closed ring. By segmenting the continuous structure, the bearing ring can be manufactured with greater precision and maintain its target shape without the constraining internal stresses of a closed configuration.
3Adaptability or versatility
If the bearing ring is made open for access, then mounting options and access are improved, but the bearing ring may lose form retention
Solution Approach 1:
The bearing mount serves as an intermediary structure that provides form retention support to the open bearing ring. The mount's bearing seat receives and supports the open ring, compensating for the reduced form retention of the open design while maintaining proper guiding quality and enabling various mounting options.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a hand-held power tool having a bearing ring (19) inserted into a bearing receptacle (18), wherein the bearing receptacle (18) and the bearing ring (19) have recessed ring sectors (17) positioned relative to one another in an overlapping manner, of which the ring sector (17) of the bearing ring is configured by breaking out a circumferential section (22) of the bearing ring (19), which is defined by predetermined breaking points (20).