Oscillating Power Tool Housing Shell Connection Plane
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Solution Overview
Problem
Existing oscillating handheld power tools face challenges in maintaining structural integrity and reducing movement between housing shells due to reaction forces generated by the oscillating drive unit, leading to potential wear and reduced service life.
Innovation Solution
The design incorporates a connection plane between housing shells that is essentially perpendicular to the output shaft's movement axis, with the drive axis arranged in the same plane to minimize reaction forces, and a form-fitting unit that counteracts relative movement, along with a cover plate and spring groove unit for secure and stable connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the housing shells are connected with a connection plane perpendicular to the output shaft movement axis, then the structural integrity is improved and movement between housing shells is reduced, but the assembly complexity increases due to the need for precise alignment and additional connecting elements
Solution Approach 1:
The housing is divided into multiple housing shells that can be separately manufactured and then assembled together through connection planes. This segmentation allows each shell to be optimized independently while maintaining overall structural integrity through precise connection interfaces.
Solution Approach 2:
The connection planes are pre-designed and pre-positioned on the housing shells during manufacturing. This preliminary preparation of connection interfaces enables faster and more accurate assembly, reducing the complexity of the final assembly process while ensuring proper alignment.
2Reliability
If the drive axis is arranged in the connection plane, then the reaction forces on housing shells are minimized and service life is extended, but the manufacturing precision requirements increase
Solution Approach 1:
The drive axis is positioned within the connection plane to create a balanced force distribution system. This arrangement ensures that reaction forces from the oscillating drive unit are evenly distributed and minimized, reducing stress on the housing shells and extending service life.
Solution Approach 2:
The spatial arrangement of the drive axis relative to the connection plane is optimized by adjusting positional parameters. By positioning the drive axis within the connection plane, the force vectors are redistributed to minimize reaction forces on the housing shells, achieving improved reliability.
3Stability of the object's composition
If form-fitting units are added to counteract relative movement between housing shells, then stability is improved, but the device complexity increases
Solution Approach 1:
The form-fitting units are integrated directly into the housing shells as built-in features rather than separate components. This merging of the form-fitting function into the housing structure itself provides stability while minimizing additional structural complexity.
Solution Approach 2:
The housing shells are designed with self-aligning and self-locking features through the form-fitting units. These features automatically counteract relative movement between shells during operation without requiring external adjustment mechanisms, providing stability through the structure's own properties.
Data Source
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AI summary
The invention proceeds from an oscillating hand-held power tool having at least one output unit (70a; 70b) which comprises at least one output shaft (72a; 72b), having at least one drive unit (74a; 74b) for oscillating drive of the output shaft (72a; 72b) and having at least one housing unit (10a; 10b) for accommodating the drive unit (74a; 74b) and the output unit (70a; 70b), which housing unit (10a; 10b) has at least two housing shells (12a, 14a; 12b, 14b). It is proposed that, in a mounted state, the housing shells (12a, 14a; 12b, 14b) have at least one connecting plane (78a; 78b) which extends substantially perpendicularly with respect to a movement axis (76a; 76b) of the output shaft (72a; 72b) and in which the housing shells (12a, 14a; 12b, 14b) are connected to one another.