Hydraulic Pump Mounting Flange Geometry for Compact High Torque
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Solution Overview
Problem
There is a trade-off between improving cooling efficiency in engine assemblies and the cost and size constraints of hydraulic motors and pumps, particularly in scenarios where increased torque is required without the practicality of using larger components due to space and cost limitations, and the need for retrofitting existing engines without significant design changes.
Innovation Solution
A hydraulic pump or motor mounting configuration that includes a shaft with specific bolt receiving slots and a pilot projection, allowing for increased torque transmission while maintaining a compact design, with dimensions and ratios optimized to accommodate more than 500 N/m of torque, and a mounting flange with bolt slots that define a radius center spaced a certain X dimension, enabling efficient torque handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a larger hydraulic motor and/or pump is used to increase torque for faster fan operation, then cooling efficiency is improved, but device size and cost increase
Solution Approach 1:
The patent changes the mounting configuration parameters of the hydraulic motor, specifically the bolt receiving slot spacing (X dimension) and slot width (Y dimension), to optimize torque transmission. By adjusting these geometric parameters, the system achieves improved cooling efficiency through better torque handling without increasing the overall motor size, thus resolving the contradiction between productivity and device volume.
2Productivity
If a larger hydraulic motor and/or pump is used to increase torque for faster fan operation, then cooling efficiency is improved, but manufacturing cost increases
Solution Approach 1:
The patent optimizes the mounting flange geometry parameters (X dimension for bolt slot spacing, Y dimension for slot width) to achieve improved torque transmission and cooling efficiency. These parameter changes allow the use of existing standard components and manufacturing processes, avoiding the need for expensive custom larger motors while still achieving the desired performance improvement, thus resolving the contradiction between productivity and manufacturing cost.
3Force
If the hydraulic motor design is changed to accommodate increased torque, then torque capacity is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by modifying only the mounting flange area (bolt receiving slots and pilot projection) rather than redesigning the entire hydraulic motor. This localized change to specific geometric parameters (X and Y dimensions) allows the torque capacity to be improved while keeping the rest of the device simple and unchanged, thus resolving the contradiction between force and device complexity.
Data Source
AI summary
A hydraulic pump or motor includes a mounting flange that is disposed at the first end of the housing. The mounting flange defines a pair of bolt receiving slots that are disposed along the X-axis on either side of the shaft. The pair of bolt receiving slots each define a radius center that are spaced away from each other a X dimension, and a pilot projection extends longitudinally away from the mounting flange, defining a pilot projection diameter. A ratio of the X dimension to the pilot projection diameter ranges from 1.1 to 1.5.