Fluid Pressure Control Housing Layout for Dense Motor Terminals
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Solution Overview
Problem
In fluid pressure control devices, a large number of terminals or a large terminal configuration leads to an increase in the size of the housing due to the need for larger through holes, which in turn increases the distance between components.
Innovation Solution
A fluid pressure control device design featuring a housing with a through hole that has a narrower width in one direction than in an orthogonal direction, allowing for more conductors and increased spacing without expanding the housing width, and positioning the second holes closer to the first hole, thus preventing housing size increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of terminals is increased or the terminal size is increased, then the current supply capability is improved, but the through hole size must be increased which causes the housing size to increase
Solution Approach 1:
The through hole is designed with an asymmetric rectangular cross-section having different width dimensions in two orthogonal directions. The first width (in the first direction) is smaller than the second width (in the second direction), allowing the housing to accommodate more terminals by arranging them along the longer second dimension while maintaining a compact first dimension that limits overall housing size.
Solution Approach 2:
Instead of increasing the through hole size uniformly in all directions, the design utilizes the second direction (orthogonal to the first direction) to provide sufficient space for multiple terminals. By orienting the rectangular cross-section such that the larger dimension is perpendicular to the arrangement direction of terminals, the housing can support increased terminal quantity without expanding the critical first dimension that determines overall housing footprint.
2Quantity of substance
If the through hole size is increased to accommodate more terminals, then the current supply capability is improved, but the distance between the through hole and other holes must be increased which causes the housing size to increase
Solution Approach 1:
The rectangular cross-section with unequal width dimensions allows the through hole to be positioned closer to other holes in the first direction (where the width is smaller) while still providing sufficient spacing in the second direction (where the width is larger) to maintain required distances between adjacent holes. This asymmetric geometry enables denser hole arrangement without compromising current supply capability.
3Reliability
If the terminal spacing is increased to reduce interference, then the current supply reliability is improved, but the housing size must be increased to accommodate the larger spacing
Solution Approach 1:
The design increases terminal spacing along the second direction (where the through hole has its larger width) rather than along the first direction. This allows adequate spacing for current supply reliability while keeping the housing compact in the first direction, effectively utilizing the larger second dimension to accommodate spaced terminals without increasing overall housing footprint.
Data Source
AI summary
A fluid pressure control device includes a motor to drive a pump; a housing having an outer surface, and a first hole that opens in a first surface of the outer surface which faces the motor. The first hole accommodates the pump, and two second holes open in the outer surface. The two second holes are spaced apart in a first direction; and a current supply unit that allows current for driving the motor to flow passes through the housing. A through hole opens in the first surface and a second surface which is opposite to the first surface of the outer surface. The through hole has a first part located between the two second holes, and a width of the first part in the first direction is smaller than a width of the first part in a second direction along the second surface and orthogonal to the first direction.