Pressed Pulley Annular Bent Connecting Portion Design
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Solution Overview
Problem
Conventional pressed pulleys have an inner tubular portion with an extremely small inner diameter relative to the outer diameter, making it impossible to mount a large-sized bearing, thereby limiting load resistance and load capacity.
Innovation Solution
A pressed pulley design that omits the side plate portion by using an annular bent connecting portion with a circular arc-shaped section, allowing for an increased inner diameter of the inner tubular portion without expanding the outer diameter, enabling the mounting of a large-sized bearing and enhancing load capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a side plate portion is provided between the outer tubular portion and the inner tubular portion, then the structural integrity and stress resistance are improved, but the inner diameter of the inner tubular portion becomes extremely small, making it impossible to mount a large-sized bearing
Solution Approach 1:
The invention extracts and removes the side plate portion from the pulley structure. By eliminating this component, the inner diameter of the inner tubular portion is significantly increased, allowing for the mounting of large-sized bearings while maintaining structural integrity through alternative design configurations of the connecting portion and arc-shaped sections
Solution Approach 2:
The invention changes the dimensional configuration by transitioning from a design with a side plate to one where the connecting portion and arc-shaped sections create a different spatial arrangement. This dimensional reconfiguration allows the inner tubular portion to achieve a larger inner diameter without compromising the overall structural strength
2Strength
If the outer diameter of the outer tubular portion is increased to accommodate a large-sized bearing, then the load capacity is improved, but the overall size of the pressed pulley increases
Solution Approach 1:
By removing the side plate portion, the invention creates additional internal space that allows large-sized bearings to be mounted within the existing outer diameter constraints, thereby increasing load capacity without increasing the overall pulley size
Solution Approach 2:
The invention changes the structural parameters by eliminating the side plate and reconfiguring the connecting portion, which transforms the internal space distribution and enables the mounting of larger bearings within the same external dimensions
Data Source
AI summary
A pressed pulley includes an annular connecting portion connected to an end of the outer tubular portion around which a belt is wound and an end of the inner tubular portion. The connecting portion is an annular bent portion having a circular arc-shaped section and formed with an inner circular arc-shaped surface having a constant radius of curvature and connected to the radially inner surface of the outer tubular portion and the radially outer surface of the inner tubular portion through respective tangential lines.